CN104920425A - Application of insecticidal protein - Google Patents

Application of insecticidal protein Download PDF

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Publication number
CN104920425A
CN104920425A CN201510257136.5A CN201510257136A CN104920425A CN 104920425 A CN104920425 A CN 104920425A CN 201510257136 A CN201510257136 A CN 201510257136A CN 104920425 A CN104920425 A CN 104920425A
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plant
stem borer
cry2ab
striped stem
insect
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CN104920425B (en
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杨旭
张爱红
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Beijing Dabeinong Biotechnology Co Ltd
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BIOTECHNOLOGY CENTER OF BEIJING DABEINONG TECHNOLOGY GROUP Co Ltd
Beijing Dabeinong Technology Group Co Ltd
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Priority to CN201510257136.5A priority Critical patent/CN104920425B/en
Publication of CN104920425A publication Critical patent/CN104920425A/en
Priority to PCT/CN2016/082588 priority patent/WO2016184397A1/en
Priority to PH12017501966A priority patent/PH12017501966A1/en
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01H—NEW PLANTS OR NON-TRANSGENIC PROCESSES FOR OBTAINING THEM; PLANT REPRODUCTION BY TISSUE CULTURE TECHNIQUES
    • A01H1/00—Processes for modifying genotypes ; Plants characterised by associated natural traits
    • A01H1/12—Processes for modifying agronomic input traits, e.g. crop yield
    • A01H1/122—Processes for modifying agronomic input traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance
    • A01H1/1245—Processes for modifying agronomic input traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance for biotic stress resistance, e.g. pathogen, pest or disease resistance
    • A01H1/127—Processes for modifying agronomic input traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance for biotic stress resistance, e.g. pathogen, pest or disease resistance for insect resistance
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N63/00—Biocides, pest repellants or attractants, or plant growth regulators containing microorganisms, viruses, microbial fungi, animals or substances produced by, or obtained from, microorganisms, viruses, microbial fungi or animals, e.g. enzymes or fermentates
    • A01N63/50—Isolated enzymes; Isolated proteins
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01H—NEW PLANTS OR NON-TRANSGENIC PROCESSES FOR OBTAINING THEM; PLANT REPRODUCTION BY TISSUE CULTURE TECHNIQUES
    • A01H4/00—Plant reproduction by tissue culture techniques ; Tissue culture techniques therefor
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
    • A01N37/18—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues thereof
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
    • A01N47/40—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having a double or triple bond to nitrogen, e.g. cyanates, cyanamides
    • A01N47/42—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having a double or triple bond to nitrogen, e.g. cyanates, cyanamides containing —N=CX2 groups, e.g. isothiourea
    • A01N47/44—Guanidine; Derivatives thereof
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    • C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
    • C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
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Abstract

The invention relates to application of an insecticidal protein. A method for controlling sorghum striped borer pests comprises the step of at least contacting the sorghum striped borer pests with a Cry2Ab protein. The sorghum striped borer pests are controlled by generating the Cry2Ab protein in a plant body to kill the sorghum striped borer pests. Compared with the agricultural prevention and control method, chemical prevention and control method and physical prevention and control method in the prior art, the method has the advantages that the whole plant is protected in the whole growth period to prevent and control the invasion of the sorghum striped borer pests, pollution and residue are not caused, the effect is stable and thorough, and the method is simple, convenient and economic.

Description

The purposes of insecticidal proteins
Technical field
The present invention relates to a kind of purposes of insecticidal proteins, particularly relate to a kind of Cry2Ab protein and control striped stem borer to cause harm the purposes of plant by expressing in plant.
Background technology
Striped stem borer Chilo sacchariphagus belongs to Lepidoptera, Pyralidae.Have another name called article sugarcane borer, or sorghum stem borer.Mainly be distributed in East Asia, South Asia, Southeast Asia and the Indian Ocean Area.Domestic distributed pole is wide, and there is generation in the most area in northeast, North China, East China and south China.Can to cause harm the crops such as corn, Chinese sorghum, grain, fiber crops, sugarcane.In North Dry Grain area, the crops such as corn, Chinese sorghum and grain of mainly causing harm, and normal and corn borer mixing generation, cause withered heart seedling; Also be the primary pest on southern sugarcane simultaneously.
Corn is Chinese important cereal crops, and along with the reinforcement of Global Greenhouse Effect, within nearly 2 years, temperature constantly rises, and insect pest species survey and quantity all increase.Striped stem borer to be caused harm lobus cardiacus in the early stage with larva, and stage can eat into food stem stalk, leaf sheath, hinders nutrient conveying, makes stem stalk be subject to windbreak and breaks.Have a strong impact on output, ordinary loss can reach 10%-40%.In order to prevent and treat striped stem borer, the main prevention and controls that people adopt usually has: cultural control, chemical control and physical control.
Cultural control is that regulation and control crop, insect, environmental factor, creation one are conducive to plant growth and are unfavorable for the farmland ecological environment that striped stem borer occurs multifactorial for whole field ecosystem comprehensive coordination management.Overwintering Larvae pupate with emergence before, Chinese sorghum or maize straw are disposed, to reduce worm source of surviving the winter.Stalk process can adopt pulverizing, burn, make compost, cut up with a hay cutter the distinct methods such as broken, mudding.Because cultural control must obey the requirement of crop allocation and volume increase, application has certain limitation, as emergency measure, just can not seem helpless when striped stem borer is broken out.
Chemical control and pesticide control, being utilize chemical insecticide to carry out kill pests, is the important component part of the striped stem borer comprehensive regulation, and it has fast, the feature of convenient, easy and high economic benefit, particularly when the large generation of striped stem borer, be absolutely necessary emergency measure.Striped stem borer, as moth stem insect, is held extremely important to its Control stage, and medication best period is before ovum incubates the Sheng phase to larva moth stem, otherwise after high instar larvae eats into stem stalk, will be difficult to the object reaching control.Current chemical prevention and control method mainly medicine liquid spray and apply pesticide-clay mixture.But chemical control also has its limitation, as improper use often cause crops generation poisoning, insect develops immunity to drugs, and killed natural enemies, contaminated environment, make field ecosystem suffer the adverse consequencess such as destruction and the safety of residue of pesticide to people, animal constitute a threat to.
Physical control mainly according to the reaction of insect to physical factor various in environmental condition, utilize various physical factor as optical, electrical, look, temp. and humidity etc. and plant equipment carry out trapping and killing, the method such as steriliation by irradiation carrys out pest control.Most widely used is at present frequency ventilating type insecticidal lamp trapping, and it utilizes the phototaxis of adult pest, closely uses up, and uses ripple at a distance, lures insect close, has certain effect to the control of striped stem borer adult; But frequency ventilating type insecticidal lamp needs every day clears up dirt on high-voltage fence in time, otherwise insecticidal effect can be affected; And can not turn on light at thundery sky, the danger of hurting sb.'s feelings of operationally shocking by electricity in addition; The disposable input of installing lamp is in addition larger.
In order to solve cultural control, chemical control and physical control limitation in actual applications, scientists finds the anti insect gene of the encoding insecticidal proteins coming from bacillus thuringiensis to proceed in plant through research, can obtain some insect-resistant transgenic plants to prevent and treat insect pest of the plant.Cry2Ab insecticidal proteins is the one in numerous insecticidal proteins, is the insoluble sexual partner's spore crystalline protein produced by bacillus thuringiensis.
Cry2Ab albumen is taken in by insect and is entered middle intestines, under toxalbumin parent toxin is dissolved in the alkaline pH environment of insect midgut.Parent toxin, by basic protein enzymic digestion, is transformed into active fragment by albumen N-and C-end; Receptors bind on active fragment and insect midgut epithelial cell membrane, inserts goldbeater's skin, causes cell membrane to occur perforation focus, destroys osmotic pressure change inside and outside cell membrane and pH balance etc., upsets the digestion process of insect, finally cause it dead.
The plant having proved to turn Cry2Ab gene can resist the infringement of the voracious noctuid insect in meadow, but, there is no so far and control the report of striped stem borer to plant hazard about by producing the transfer-gen plant of expressing Cry2Ab albumen.
Summary of the invention
The object of this invention is to provide a kind of purposes of insecticidal proteins, provide first and control the method for striped stem borer to plant hazard by producing the transfer-gen plant of expressing Cry2Ab albumen, and effectively overcome the technological deficiencies such as prior art cultural control, chemical control and physical control.
For achieving the above object, the invention provides a kind of method controlling striped stem borer insect, comprise by striped stem borer insect at least with Cry2Ab protein contact.
Further, described Cry2Ab albumen is present in the host cell at least producing described Cry2Ab albumen, described striped stem borer insect by ingest described host cell at least with described Cry2Ab protein contact.
Further, described Cry2Ab albumen is present in the bacterium or genetically modified plants at least producing described Cry2Ab albumen, described striped stem borer insect by ingest described bacterium or described genetically modified plants organize at least with described Cry2Ab protein contact, after contact, described striped stem borer insect growth is suppressed and/or causes death, to realize the control to striped stem borer harm plant.
In technique scheme, described genetically modified plants can be in any breeding time; Described genetically modified plants be organized as root, blade, stem stalk, fruit, tassel, female fringe, bud, flower pesticide or filigree; The described control to striped stem borer harm plant does not change because planting the change in place and/or implantation time.
Described plant is from gramineous crops such as corn, Chinese sorghum, sugarcane, grain, fiber crops or the seeds of Job's tears.
Step before described contact procedure is the plant of the polynucleotides of plantation containing the described Cry2Ab albumen of coding.
Preferably, the amino acid sequence of described Cry2Ab albumen has the amino acid sequence shown in SEQ ID NO:1.The nucleotide sequence of described Cry2Ab albumen has the nucleotide sequence shown in SEQ ID NO:2.
On the basis of technique scheme, described plant can also comprise the second nucleotide that at least one is different from the nucleotide of described Cry2Ab albumen of encoding.
Further, described the second nucleotide coding Cry class insect-killing protein, Vip class insect-killing protein, protease inhibitors, agglutinin, α-amylase or peroxidase.
Preferably, described the second nucleotide coding Cry1A.105 albumen.
Further, the amino acid sequence of described Cry1A.105 albumen has the amino acid sequence shown in SEQ ID NO:3.
Further, described the second nucleotide has the nucleotide sequence shown in SEQ ID NO:4.
Selectively, described the second nucleotide is the dsRNA suppressing important gene in target insect pests.
For achieving the above object, present invention also offers the purposes that a kind of Cry2Ab protein controls striped stem borer insect.
For achieving the above object, present invention also offers a kind of method producing the plant controlling striped stem borer insect, comprise the polynucleotide sequence introducing coding Cry2Ab albumen in the genome of described plant.
For achieving the above object, present invention also offers a kind of method producing the propagulum controlling striped stem borer insect, comprise and the first plant obtained by described method and the second plant are hybridized, and/or take off the tissue plant that obtained by described method with fertility and cultivate, thus produce the propagulum of the polynucleotide sequence containing coding Cry2Ab albumen.
For achieving the above object, present invention also offers a kind of method of cultivating the plant controlling striped stem borer insect, comprising:
Plant at least one propagulum, the genome of described propagulum comprises the polynucleotide sequence of coding Cry2Ab albumen;
Described propagulum is made to grow up to plant;
Described plant is grown under the condition of artificial infection striped stem borer insect and/or striped stem borer insect naturally-occurring harm, there is compared with the plant of gathering in the crops the polynucleotide sequence with other without Cry2Ab albumen of encoding the plant of the plant injury weakened and/or the plant products with increase.
" propagulum " described in the present invention includes but not limited to plant tannins and plant vegetative propagule.Described plant tannins includes but not limited to plant seed; Described plant vegetative propagule refers to nutrition organs or certain particular tissues of plant corpus, and it can produce new plant in vitro; Described nutrition organs or certain particular tissues include but not limited to root, stem and leaf, such as: be that the plant of vegetative propagule comprises strawberry and sweet potato etc. with root; Be that the plant of vegetative propagule comprises sugarcane and potato (stem tuber) etc. with stem; Be that the plant of vegetative propagule comprises aloe and begonia etc. with leaf.
" contact " described in the present invention, refer to insect and/or insect touching, stop and/or feeding plant, plant organ, plant tissue or plant cell, described plant, plant organ, plant tissue or plant cell both can be its expression in vivo insecticidal proteins, can also be described plant, the surface of plant organ, plant tissue or plant cell has insecticidal proteins and/or have and produce the microorganism of insecticidal proteins.
Term of the present invention " control " and/or " control " refer to striped stem borer insect at least with Cry2Ab protein contact, contact after striped stem borer insect growth be suppressed and/or cause death.Further, striped stem borer insect by feeding plant organize at least with Cry2Ab protein contact, after contact, the growth of all or part of striped stem borer insect is suppressed and/or causes death.Suppress to refer to sub-lethal, namely not yet lethal but can cause grow, behavior, physiology, the aspect such as biochemistry and tissue certain effect, as grown slowly and/or stopping.Meanwhile, plant should be morphologically normal, and the consumption can cultivated under conventional approaches for product and/or generation.In addition, the plant of the control striped stem borer insect of the polynucleotide sequence containing coding Cry2Ab albumen and/or plant seed, under the condition that artificial infection striped stem borer insect and/or the naturally-occurring of striped stem borer insect endanger, have the plant injury weakened compared with not genetically modified WT lines, concrete manifestation includes but not limited to stem stalk resistance and/or the kernel weight improved and/or the volume increase etc. of improvement.Cry2Ab albumen is can be self-existent to " control " and/or " control " of striped stem borer effect, not because other can " control " and/or the existence of the material of " control " striped stem borer insect and weaken and/or disappear.Particularly, any tissue of genetically modified plants (polynucleotide sequence containing coding Cry2Ab albumen) simultaneously and/or asynchronously, exist and/or produce, Cry2Ab albumen and/or the another kind of material of striped stem borer insect can be controlled, then the existence of described another kind of material neither affects Cry2Ab albumen and acts on " control " and/or " control " of striped stem borer, described " control " and/or " control " effect can not be caused to be realized by described another kind of material completely and/or partly, and have nothing to do with Cry2Ab albumen.Under normal circumstances, in land for growing field crops, the process of striped stem borer insect feeding plant tissue is of short duration and be difficult to observe with the naked eye, therefore, under the condition that artificial infection striped stem borer insect and/or the naturally-occurring of striped stem borer insect endanger, there is dead striped stem borer insect in any tissue as genetically modified plants (polynucleotide sequence containing coding Cry2Ab albumen), and/or stop the striped stem borer insect growing and be suppressed thereon, and/or there is the plant injury weakened compared with not genetically modified WT lines, be and achieve method of the present invention and/or purposes, namely by striped stem borer insect at least with Cry2Ab protein contact to realize the method and/or the purposes that control striped stem borer insect.
In the present invention, the expression of Cry2Ab albumen in a kind of genetically modified plants can along with the expression of one or more Cry class insect-killing protein.This kind of Pesticidal toxins co expression in same strain genetically modified plants that exceedes can make plant comprise by genetic engineering and gene needed for expressing realizes.In addition, a Plants (the 1st parent) can express Cry2Ab protein by genetic engineering procedure, and the second plant (the 2nd parent) can express Cry class insect-killing protein by genetic engineering procedure.The progeny plants of all genes of expressing introducing the 1st parent and the 2nd parent is obtained by the 1st parent and the 2nd parents.
RNA interference (RNA interference, RNAi) refer to high conservative during evolution, brought out by double-stranded RNA (double-stranded RNA, dsRNA), the phenomenon of the efficient selective degradation of homologous mRNA.Therefore the expression of specific gene in RNAi technology specific depletion or closedown target insect pests can be used in the present invention.
In categorizing system, generally the morphological feature such as type of the main nervuration according to adult wing, linkage mode and feeler, Lepidoptera is divided into suborder, Superfamily, section etc., and Pyralidae is one of section of most species in Lepidoptera, the whole world has found more than 10,000 kinds, and only China's record just has several thousand.Major part Pyralidae insect is the insect of crops, and majority is caused harm, as striped rice borer and corn borer to eat into stem form.Although striped stem borer and striped rice borer, corn borer etc. belong to Lepidoptera Pyralidae, except there is similitude in criteria for classification, then there is huge difference in other morphosis; Like the strawberry in plant the same with apple (belonging to the Rosales rose family), the features such as they have colored both sexes, radiation symmetric, 5, petal, but its fruit and plant forms but vary.No matter striped stem borer is from Larva Morpho. Logy or adult form, all has the feature of its uniqueness.As back ordinate, just have in peasant and spread " Chinese sorghum corn paddy, lineback 345 ", represent that belonging to the striped stem borer of Pyralidae, corn borer and millet borer quantitatively just exists obvious difference at lineback.And be exactly dorsal blood vessel under the ordinate of back, dorsal blood vessel is the important component part of insect causing circulatory, is filled with the hemolymph of the title of insect " blood " inside.Therefore body surface form seems the difference of trickle lineback quantity, embodiment be but the difference of dorsal blood vessel, be the difference in the insect circulatory system.
Not only there is larger difference in the insect belonging to Pyralidae together, simultaneously on feeding habit, also there are differences in morphological feature.The paddy stem borer being such as all Pyralidae is only caused harm paddy rice, other gramineous crop of seldom causing harm.And striped stem borer to be caused paddy rice there are no report and causes harm, be more to southern sugarcane, the corn in the north, Chinese sorghum and millet are caused and cause harm.The difference of feeding habit, also imply that the enzyme that the digested system of body produces is different with receptor protein.And the enzyme produced in digestive tract is the key point that Bt gene works, the enzyme that only can combine with specific b t gene or receptor protein, just likely make certain this insect of Bt gene pairs have insect resistant effect.Increasing research shows, the susceptibility performance of not equal with order, even equal insect not of the same race to Bt albumen of the same race is different.Striped rice borer Chilo suppressalis, the Asiatic corn borer Ostrinia furnacalis of such as Vip3Aa gene pairs Pyralidae show anti-insect activity, but but do not have insect resistant effect for the Indian meal moth Plodia interpunctella and European corn borer Ostrinia nubilalis belonging to Pyralidae together.Above-mentioned four kinds of insects all belong to Lepidoptera Pyralidae, but Bt albumen of the same race shows different resistance effects to four kinds of Pyralidae insects.Especially European corn borer and Asiatic corn borer even belong to Pyralidae Genus Ostinia (belonging to together with order is equal) in classification, but it is but distinct to the reaction of Bt albumen of the same race, more absolutely prove that the interaction mode of Bt albumen and insect bodies endoenzyme and acceptor is complexity and is difficult to expect.
Meanwhile, in the research circle of bacillus thuringiensis, there is the understanding that one general, think that the mode of action of Cry2 toxin on insects is unique, itself and Cry1A type endotoxin not only do not have significant autoploidy on amino acid sequence, and show different combinations and hole Formation and characteristics, therefore, when known Cry2 toxin and Cry1A type endotoxin combinationally use to control/prevent and treat the endotoxic target pest of Cry1A, cannot determine whether Cry2 toxin has control/preventive and therapeutic effect to described target pest.
The genome of the plant described in the present invention, plant tissue or plant cell, refers to any genetic material in plant, plant tissue or plant cell, and comprises cell nucleus and plastid and mitochondrial genomes.
Polynucleotides described in the present invention and/or nucleotide are formed complete " gene ", coded protein or polypeptide in required host cell.Those skilled in the art are easy to recognize, under polynucleotides of the present invention and/or nucleotide can being placed in the regulating and controlling sequence control of object host.
Well-known to those skilled in the art, DNA typically exists with double chain form.In this arrangement, a chain and another chain complementation, vice versa.Because DNA copies other complementary strand creating DNA in plant.Like this, the present invention includes the use of polynucleotides to example in sequence table and complementary strand thereof." coding strand " that this area often uses refers to the chain be combined with antisense strand.In order to marking protein in vivo, DNA chain is transcribed into the complementary strand of a mRNA by typical case, and it translates protein as template.MRNA is actually and transcribes from " antisense " chain of DNA." have justice " or " coding " chain has a series of codon (codon is three nucleotide, once reads three and can produce specific amino acids), it can be used as open reading frame (ORF) and reads and form destination protein matter or peptide.The present invention also comprises the RNA having suitable function with the DNA of example.
Nucleic acid molecule of the present invention or its fragment under strict conditions with Cry2Ab gene recombination of the present invention.The nucleic acid hybridization of any routine or amplification method may be used to the existence identifying Cry2Ab gene of the present invention.Nucleic acid molecules or its fragment can carry out specific hybrid with other nucleic acid molecules in any case.In the present invention, if two nucleic acid molecules can form antiparallel double-strandednucleic acid structure, just can say that these two nucleic acid molecules can carry out specific hybrid to each other.If two nucleic acid molecules demonstrate complementary completely, then one of them nucleic acid molecules is claimed to be another nucleic acid molecules " complement ".In the present invention, when corresponding nucleotide complementary with another nucleic acid molecules of each nucleotide of a nucleic acid molecules, then these two nucleic acid molecules are claimed to demonstrate " complete complementary ".If two nucleic acid molecules can make their annealing and being bonded to each other under at least conventional " low strict " condition with enough stability phase mutual crosses, then claim these two nucleic acid molecules for " minimum level is complementary ".Similarly, if two nucleic acid molecules can make them anneal under " highly strict " condition of routine and be bonded to each other with enough stability phase mutual crosses, then these two nucleic acid molecules are claimed to have " complementarity ".Depart from from complete complementary and can allow, depart from as long as this and not exclusively stop two molecules to form duplex structure.In order to enable a nucleic acid molecules as primer or probe, only need to ensure that it has sufficient complementarity in sequence, to make form stable duplex structure under adopted specific solvent and salinity.
In the present invention, the sequence of basic homology is one section of nucleic acid molecules, this nucleic acid molecules under high stringency can with the complementary strand generation specific hybrid of another section of nucleic acid molecules matched.Promote the stringent condition be applicable to of DNA hybridization, such as, process greatly under 45 DEG C of conditions by 6.0 × sodium chloride/sodium citrate (SSC), then wash with 2.0 × SSC under 50 DEG C of conditions, these conditions are known to those skilled in the art.Such as, the salinity in washing step can be selected from Low stringency conditions about 2.0 × SSC, 50 DEG C to high stringency about 0.2 × SSC, 50 DEG C.In addition, the temperature condition in washing step from the room temperature of Low stringency conditions about 22 DEG C, can be elevated to about 65 DEG C of high stringency.Temperature condition and salinity can all change, and also can one of them to remain unchanged and another variable changes.Preferably, stringent condition of the present invention can be in 6 × SSC, 0.5%SDS solution, at 65 DEG C, with SEQ ID NO:2, specific hybrid occurs, and then uses 2 × SSC, 0.1%SDS and 1 × SSC, 0.1%SDS respectively to wash film 1 time.
Therefore, there is anti-insect activity and the sequence of hybridizing with SEQ ID NO:2 of the present invention under strict conditions comprises in the present invention.These sequences and sequence of the present invention be 40%-50% homology at least approximately, about 60%, 65% or 70% homology, even at least about sequence homology of 75%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or larger.
Gene described in the present invention and protein not only comprise specific exemplary sequence, also comprise part and/or fragment (comprising compared with full length protein and/or terminal deletion), variant, mutant, substituent (having alternative amino acid whose protein), chimera and the fusion of the insecticidal activity feature of the protein saving described particular example.Described " variant " or " variation " refer to that the same albumen of coding or coding have the nucleotide sequence of the equivalent protein of insecticidal activity.Described " equivalent protein " refers to the bioactive albumen with the albumen of claim with identical or substantially identical anti-striped stem borer insect.
" fragment " or " brachymemma " of the DNA molecular described in the present invention or protein sequence refers to a part or its artificial reconstructed form (being such as applicable to the sequence of expression of plants) of original DNA or the protein sequence (nucleotide or amino acid) related to, can there is change in the length of foregoing sequences, but length is enough to guarantee that (coding) protein is insect toxins.
Use standard technique can build gene variant with being easy to by modifier gene.Such as, the technology of well known manufacturing place sudden change.Such as U.S. Patent number 5605793 describes and after random fracture, to use DNA to reassembly produce the method for other molecular diversity again.Commercialization endonuclease can be used to manufacture the fragment of full-length gene, and exonuclease can be used according to standardization program.Such as, enzyme such as Bal31 or direct mutagenesis can be used to excise nucleotide from the end system of these genes.Multiple restriction enzyme can also be used to obtain the gene of encode active fragments.Protease can be used directly to obtain the active fragment of these toxin.
The present invention can derive equivalent protein and/or the gene of these equivalent protein of encoding from B.t. separator and/or DNA library.Multiple method is had to obtain insecticidal proteins of the present invention.Such as, the present invention's antibody that is open and claimed insecticidal proteins can be used to identify from protein mixture and be separated other albumen.Especially, antibody may be that the most constant by albumen and the most different from other B.t. albumen protein parts causes.Then these antibody can be used exclusively to identify the equivalent protein of activity characteristic by immunoprecipitation, enzyme linked immunosorbent assay (ELISA) (ELISA) or western immunoblot method.This area standardization program can be used to be easy to the antibody of the fragment preparing albumen or equivalent protein or this plastein disclosed in the present invention.Then the gene of these albumen of coding can be obtained from microorganism.
Due to the Feng Yuxing of genetic codon, multiple different DNA sequence dna can be encoded identical amino acid sequence.Produce the alternative DNA sequence dna of the identical or substantially identical albumen of these codings just in the technical merit of those skilled in the art.These different DNA sequence dnas comprise within the scope of the invention.Described " substantially the same " sequence refers to 49-Phe ,82-Ser,115-Arg,144-Met,145-Asn ,161-Arg,169-Met Human Connective tissue growth factor, disappearance, interpolation or insertion but does not affect in fact the sequence of insecticidal activity, also comprises the fragment retaining insecticidal activity.
The replacement of amino acid sequence in the present invention, disappearance or interpolation are the ordinary skill in the art, and preferably this seed amino acid is changed to: little characteristic changing, and the folding and/or active conserved amino acid namely significantly not affecting albumen replaces; Little disappearance, usually about 1-30 amino acid whose disappearance; Little amino or c-terminus extend, and such as aminoterminal extends a methionine residues; Little connection peptide, such as an about 20-25 residue is long.
The conservative example replaced is the replacement occurred in following amino acid group: basic amino acid (as arginine, lysine and histidine), acidic amino acid (as glutamic acid and aspartic acid), polar amino acid (as glutamine, asparagine), hydrophobic amino acid (as leucine, isoleucine and valine), ArAA (as phenyl alanine, tryptophan and tyrosine), and Small molecular amino acid (as glycine, alanine, serine, threonine and methionine).Usually those 49-Phe ,82-Ser,115-Arg,144-Met,145-Asn ,161-Arg,169-Met Human Connective tissue growth factors not changing given activity are well-known in this area, and by, such as, N.Neurath and R.L.Hill was described in new york academic publishing house (Academic Press) " Protein " that publish in 1979.Modal exchange has Ala/Ser, Val/Ile, Asp/Glu, Thu/Ser, Ala/Thr, Ser/Asn, Ala/Val, Ser/Gly, Tyr/Phe, Ala/Pro, Lys/Arg, Asp/Asn, Leu/Ile, Leu/Val, Ala/Glu and Asp/Gly, and their contrary exchanges.
For a person skilled in the art apparently, this replacement can occur outside the region played an important role to molecular function, and still produces active peptides.For by polypeptide of the present invention, its active required amino acid residue also therefore selecting not to be substituted, can according to methods known in the art, as direct mutagenesis or alanine scanning mutagenesis carry out identifying (as see, Cunningham and Wells, 1989, Science244:1081-1085).A rear technology is that each positively charged residue place introduces sudden change in the molecule, detects the anti-insect activity of gained mutating molecule, thus determines the amino acid residue wanted of overstating to this molecular activity.Substrate-enzyme interacting site also can be measured by the analysis of its three-dimensional structure, this three-dimensional structure can be measured by technology such as nuclear magnetic resonance spectroscopy, crystallography or photoaffinity labeling (see, as de Vos etc., 1992, Science 255:306-312; Smith etc., 1992, J.Mol.Biol 224:899-904; Wlodaver etc., 1992, FEBS Letters 309:59-64).
In the present invention, Cry2Ab albumen includes but not limited to sequence 1, and the amino acid sequence with the amino acid sequence shown in sequence 1 with certain autoploidy is also included within the present invention.These sequences and sequence similarities/homogeny of the present invention are typically greater than 78%, are preferably greater than 85%, are preferredly greater than 90%, are even preferredly greater than 95%, and can be greater than 99%.Also can according to homogeny particularly and/or similarity scope definition preferred polynucleotides of the present invention and protein.Homogeny and/or the similarity of 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 99% is such as had with the sequence of example of the present invention.
In the present invention, the genetically modified plants producing described Cry2Ab albumen include but not limited to Mon89034 transgenic corn events and/or comprise the vegetable material (as described by CN101495635A) of Mon89034 transgenic corn events, MON87751 transgenic soybean event and/or comprise the vegetable material (as described by USDA APHIS non-control state application 13-337-01p) of MON87751 transgenic soybean event, or Mon15985 transgenic cotton event and/or comprise the vegetable material (as described by CN101413028B) of Mon15985 transgenic cotton event, it all can to perform the methods of the present invention and/or purposes, namely by striped stem borer insect at least with Cry2Ab protein contact to realize the method and/or the purposes that control striped stem borer insect.Understood by one of ordinary skill in the art, the Cry2Ab albumen in above-mentioned transgenic event is expressed in different plant and also can realize method of the present invention and/or purposes.More specifically, described Cry2Ab albumen is present in the genetically modified plants at least producing described Cry2Ab albumen, described striped stem borer insect by the described genetically modified plants that ingest organize at least with described Cry2Ab protein contact, after contact, described striped stem borer insect growth is suppressed and/or causes death, to realize the control to striped stem borer harm plant.
Regulating and controlling sequence described in the present invention include but not limited to promotor, transit peptides, terminator, enhancer, targeting sequencing, intron and other be operably connected to the adjustment sequence of described Cry2Ab albumen.
Described promotor is effable promotor in plant, and described " in plant effable promotor " refers to and guarantee that connected coded sequence carries out the promotor expressed in plant cell.In plant, effable promotor can be constitutive promoter.Instruct the example of the promotor of constitutive expression in plant to include but not limited to, derive from the promotor etc. of the 35S promoter of cauliflower mosaic virus, corn Ubi promotor, paddy rice GOS2 gene.Alternatively, in plant, effable promotor can be tissue-specific promotor, namely this promotor in some tissues of plant as instructed the expression of coded sequence higher than its hetero-organization (test by conventional RNA and measure) of plant in chlorenchyma, as PEP carboxylase promoter.Alternatively, in plant, effable promotor can be wound-induced promotor.Wound-induced promotor or instruct the promotor of the expression pattern of wound-induced to refer to when plant is stood machinery or gnaws by insect the wound caused, is significantly increased under the expression compared with normal growth conditions of the coded sequence under promoter regulation.The example of wound-induced promotor includes but not limited to, the protease suppressor (pin I and pin II) of potato and tomato and the promotor of zein enzyme level gene (MPI).
Described transit peptides (also known as secretory signal sequence or targeting sequencing) instructs transgene product to arrive specific organelle or cellular compartment, concerning receptor protein, described transit peptides can be allos, such as, utilize encoding chloroplast transit peptide sequence target chloroplast, or utilize ' KDEL ' reservation queue target endoplasmic reticulum, or utilize the CTPP target vacuole of barley plants agglutinin gene.
Described targeting sequencing including but not limited to, picornavirus targeting sequencing, as EMCV targeting sequencing (encephalomyocarditis virus 5 ' noncoding region); Potyvirus leaders, as MDMV (Maize Dwarf Mosaic Virus) targeting sequencing; Human immunoglobulin matter heavy-chain binding protein matter (BiP); The coat protein mRNA of alfalfa mosaic virus does not translate targeting sequencing (AMV RNA4); Tobacco mosaic virus (TMV) targeting sequencing.
Described enhancer including but not limited to, cauliflower mosaic virus (CaMV) enhancer, figwort mosaic virus (FMV) enhancer, carnation weathering circovirus virus (CERV) enhancer, cassava vein mosaic virus (CsVMV) enhancer, Mirabilis jalapa mosaic virus (MMV) enhancer, dama de noche tomato yellow leaf curl China virus (CmYLCV) enhancer, Cotton leaf curl Multan virus (CLCuMV), commelina yellow mottle virus (CoYMV) and peanut chlorisis streak mosaic virus (PCLSV) enhancer.
For monocotyledon application for, described intron including but not limited to, corn hsp70 intron, maize ubiquitin intron, Adh introne 1, crose synthase intron or paddy rice Act1 intron.For dicotyledon application for, described intron including but not limited to, CAT-1 intron, pKANNIBAL intron, PIV2 intron and " super ubiquitin " intron.
Described terminator can for the applicable polyadenylation signal sequence worked in plant, include but not limited to, derive from the polyadenylation signal sequence of Agrobacterium (Agrobacterium tumefaciens) rouge alkali synthetase (NOS) gene, derive from protease-inhibitor Ⅱ (pin II) gene polyadenylation signal sequence, derive from the polyadenylation signal sequence of pea ssRUBISCO E9 gene and derive from the polyadenylation signal sequence of alpha-tubulin (α-tubulin) gene.
" effectively connect " described in the present invention represents the connection of nucleotide sequence, and described connection makes a sequence can provide function concerning needing linked sequence." effectively connect " in the present invention and can, for promotor to be connected with interested sequence, make transcribing of this interested sequence be subject to the control of this promotor and regulation and control." effectively connect " when interested sequential coding albumen and when going for the expression of this albumen and represent: promotor is connected with described sequence, and the mode be connected makes the transcript efficient translation obtained.If the connection of promotor and coded sequence is transcript when merging and want the expression realizing the albumen of encoding, manufactures such connection, make the first translation initiation codon in the transcript obtained be the initiation codon of coded sequence.Alternatively, if the connection of promotor and coded sequence is translated when merging and want the expression realizing the albumen of encoding, manufacture such connection, the first translation initiation codon of containing in 5 ' non-translated sequence and promotor are connected, and connected mode make the translation product obtained meet reading frame with the relation of the translation opening code-reading frame of the albumen wanted of encoding.The nucleotide sequence that can " effectively connect " includes but not limited to: sequence (the i.e. gene expression element providing gene expression function, such as promotor, 5 ' untranslated region, intron, protein encoding regions, 3 ' untranslated region, poly-putative adenylylation site and/or transcription terminator), sequence (the i.e. T-DNA border sequence of DNA transfer and/or integration function is provided, site-specific recombinase recognition site, integrase recognition site), sequence (the i.e. antibiotic resistance markers of selectivity function is provided, biosynthesis gene), the sequence of label function of can scoring is provided, interior sequence (the i.e. polylinker sequence of assisting series of operations of external or body, Site-specific recombinase sequence) and sequence (the i.e. origin of replication of bacterium of copy function is provided, autonomously replicating sequence, centromeric sequence).
" desinsection " or " pest-resistant " described in the present invention refers to crop pests it is poisonous, thus realizes " control " and/or " control " crop pests.Preferably, described " desinsection " or " pest-resistant " refer to and kill crop pests.More specifically, targeted insect is striped stem borer insect.
In the present invention, Cry2Ab albumen has toxicity to striped stem borer insect.Plant in the present invention, particularly corn, sugarcane and Chinese sorghum, containing foreign DNA in its genome, described foreign DNA comprises the nucleotide sequence of coding Cry2Ab albumen, striped stem borer insect is by feeding plant tissue and this protein contact, and after contact, the growth of striped stem borer insect is suppressed and/or causes death.Suppression refers to lethal or sub-lethal.Meanwhile, plant should be morphologically normal, and the consumption can cultivated under conventional approaches for product and/or generation.In addition, this plant can eliminate the needs (insecticide that described chemistry or biological insecticides are the striped stem borer insect for Cry2Ab albumen institute target) to chemistry or biological insecticides substantially.
In vegetable material, the expression of insecticidal crystal protein (ICP) detects by multiple method described in this area, such as undertaken quantitatively by applying the mRNA of special primer to the coded insect-killing protein produced in tissue, or the amount of the insect-killing protein of directly specific detection generation.
The insecticidal effect of ICP in different test determination plants can be applied.In the present invention, targeted insect is mainly striped stem borer.
In the present invention, described Cry2Ab albumen can have the amino acid sequence shown in SEQ ID NO:1 in sequence table.Except comprising the code area of Cry2Ab albumen, also can comprise other elements, the protein of such as encoding selection markers.
In addition, the expression cassette comprising the nucleotide sequence of code book invention Cry2Ab albumen can also be expressed in plant together with the protein of at least one encoding herbicide resistance gene, described herbicide resistance gene includes but not limited to, phosphine oxamate resistant gene is (as bar gene, pat gene), phenmedipham resistant gene (as pmph gene), Glyphosate resistance gene (as EPSPS gene), Brominal (bromoxynil) resistant gene, sulfonylurea resistance gene, to the resistant gene of weed killer herbicide dalapon, to the resistant gene of cyanamide or the resistant gene of glutamine synthetase inhibitor (as PPT), thus acquisition had both had high insecticidal activity, there are again the genetically modified plants of Herbicid resistant.
In the present invention, by Exogenous DNA transfered plant, as by the gene of described for coding Cry2Ab albumen or expression cassette or recombinant vector importing plant cell, conventional method for transformation includes but not limited to, Agrobacterium-medialed transformation, trace launch bombardment, direct DNA DNA being taken in the mediation of protoplast, electroporation or silicon whisker imports.
The invention provides a kind of purposes of insecticidal proteins, have the following advantages:
1, internal cause control.Prior art mainly controls the harm of striped stem borer insect by external action and external cause, as cultural control, chemical control and physical control; And the present invention controls striped stem borer insect by producing the Cry2Ab albumen that can kill striped stem borer in plant corpus, namely prevented and treated by internal cause.
2, pollution-free, noresidue.Although the chemical prevention and control method that prior art uses serves certain effect to the harm controlling striped stem borer insect, also pollution brought to people, animal and field ecosystem simultaneously, destroy and remain; Use the present invention to control the method for striped stem borer insect, above-mentioned adverse consequences can be eliminated.
3, control in the time of infertility.The method of the control striped stem borer insect that prior art uses is all interim; and the present invention is protection plant being carried out to the time of infertility; genetically modified plants (Cry2Ab albumen) from germination, growth, until bloom, result, the infringement suffering striped stem borer can be avoided.
4, whole plant control.The method of the control striped stem borer insect that prior art uses is locality mostly, as foliage-spray; And the present invention protects whole plant, as the root of genetically modified plants (Cry2Ab albumen), blade, stem stalk, fruit, tassel, female fringe, bud, flower pesticide or filigree etc. all can resist striped stem borer infringement.
5, effect stability.What prior art used is that cultural control method or physical control method all need to utilize environmental condition to prevent and treat insect, and variable factor is more; The present invention makes described Cry2Ab albumen express in plant corpus, efficiently avoid the defect of environmental condition instability, and the control efficiency of genetically modified plants of the present invention (Cry2Ab albumen) in different location, different time, different genetic background is also all stable and consistent.
6, simple, convenient, economical.The physical control method that prior art uses has certain difficulty in agricultural production operation; The present invention only need plant the genetically modified plants can expressing Cry2Ab albumen, and does not need to adopt other measure, thus saves a large amount of human and material resources and financial resources.
7, effect is thorough.The method of the control striped stem borer insect that prior art uses, its effect is halfway, only plays and alleviates effect; And genetically modified plants of the present invention (Cry2Ab albumen) can cause the mortality of striped stem borer newly hatched larvae, and great suppression is caused to a small amount of survival larvae development progress, after 3 days, larva is substantially still in and just incubates state, it is all obvious depauperation, and stasi, cannot survive in the natural environment of field, and genetically modified plants are only subject to slight damage substantially.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is that the recombinant cloning vector DBN01-T containing Cry2Ab nucleotide sequence of the purposes of insecticidal proteins of the present invention builds flow chart;
Fig. 2 is that the recombinant expression carrier DBN100745 containing Cry2Ab nucleotide sequence of the purposes of insecticidal proteins of the present invention builds flow chart;
Fig. 3 is the blade injury figure of the transgenic corn plant inoculation striped stem borer of the purposes of insecticidal proteins of the present invention.
Embodiment
The technical scheme of the purposes of insecticidal proteins of the present invention is further illustrated below by specific embodiment.
The acquisition of the first embodiment, gene and synthesis
1, nucleotide sequence is obtained
The amino acid sequence (634 amino acid) of Cry2Ab insect-killing protein, as shown in SEQ ID NO:1 in sequence table; Encode corresponding to the Cry2Ab nucleotide sequence (1905 nucleotide) of the amino acid sequence of described Cry2Ab insect-killing protein, as shown in SEQ ID NO:2 in sequence table.
The amino acid sequence (1177 amino acid) of Cry1A.105 insect-killing protein, as shown in SEQ IDNO:3 in sequence table; Encode corresponding to the Cry1A.105 nucleotide sequence (3534 nucleotide) of the amino acid sequence of described Cry1A.105 insect-killing protein, as shown in SEQ ID NO:4 in sequence table.
2, above-mentioned nucleotide sequence is synthesized
Described Cry2Ab nucleotide sequence (as shown in SEQ ID NO:2 in sequence table) and as described in Cry1A.105 nucleotide sequence (as shown in SEQ ID NO:4 in sequence table) synthesized by Nanjing Genscript Biotechnology Co., Ltd.; 5 ' end of the described Cry2Ab nucleotide sequence (SEQ ID NO:2) of synthesis is also connected with NcoI restriction enzyme site, and 3 ' end of described Cry2Ab nucleotide sequence (SEQ ID NO:2) is also connected with SpeI restriction enzyme site; 5 ' end of the described Cry1A.105 nucleotide sequence (SEQ ID NO:4) of synthesis is also connected with NcoI restriction enzyme site, and 3 ' end of described Cry1A.105 nucleotide sequence (SEQ ID NO:4) is also connected with HindIII restriction enzyme site.
The structure of the second embodiment, recombinant expression carrier and recombinant expression carrier transformation Agrobacterium
1, the recombinant cloning vector containing Cry2Ab gene is built
The Cry2Ab nucleotide sequence of synthesis is connected into cloning vector pGEM-T (Promega, Madison, USA, CAT:A3600) on, operating procedure is undertaken by Promega Products pGEM-T carrier specification, obtain recombinant cloning vector DBN01-T, it builds flow process, and (wherein, Amp represents ampicillin resistance gene as shown in Figure 1; F1 represents the origin of replication of phage f1; LacZ is LacZ initiation codon; SP6 is SP6RNA polymerase promoter; T7 is t7 rna polymerase promotor; Cry2Ab is Cry2Ab nucleotide sequence (SEQ ID NO:2); MCS is multiple clone site).
Then by recombinant cloning vector DBN01-T heat shock method transformation of E. coli T1 competent cell (Transgen, Beijing, China, CAT:CD501), its hot shock condition is: 50 μ l Escherichia coli T1 competent cells, 10 μ l plasmid DNA (recombinant cloning vector DBN01-T), 42 DEG C of water-baths 30 seconds; 37 DEG C of shaken cultivation 1 hour (under 100rpm rotating speed shaking table shake), LB flat board (the tryptone 10g/L of the ampicillin (100 mg/litre) of IPTG (isopropylthio-β-D-galactoside) and X-gal (the chloro-3-indoles of the bromo-4-of 5--β-D-galactoside) is scribbled on surface, yeast extract 5g/L, NaCl 10g/L, agar 15g/L, adjusts pH to 7.5 with NaOH) upper grow overnight.Picking white colony, LB liquid nutrient medium (tryptone 10g/L, yeast extract 5g/L, NaCl 10g/L, ampicillin 100mg/L, with NaOH adjust pH to 7.5) under temperature 37 DEG C of conditions overnight incubation.Its plasmid of alkalinity extraction: by bacterium liquid centrifugal 1min under 12000rpm rotating speed, remove supernatant, precipitation thalline solution I (25mM Tris-HCl, the 10mM EDTA (ethylenediamine tetra-acetic acid) of 100 μ l ice precoolings, 50mM glucose, pH8.0) suspend; Add the solution II (0.2M NaOH, 1%SDS (lauryl sodium sulfate)) that 200 μ l newly prepare, pipe is put upside down 4 times, mixing, puts 3-5min on ice; Add the ice-cold solution III of 150 μ l (3M potassium acetate, 5M acetic acid), fully mix immediately, place 5-10min on ice; Centrifugal 5min under temperature 4 DEG C, rotating speed 12000rpm condition, adds 2 times of volume absolute ethyl alcohols in supernatant, and after mixing, room temperature places 5min; Centrifugal 5min under temperature 4 DEG C, rotating speed 12000rpm condition, abandons supernatant, and precipitation concentration (V/V) is dry after the ethanol washing of 70%; Add TE (10mM Tris-HCl, 1mM EDTA, the pH8.0) dissolution precipitation of 30 μ l containing RNase (20 μ g/ml); Water-bath 30min at temperature 37 DEG C, digestion RNA; Save backup in temperature-20 DEG C.
The plasmid extracted is after EcoRI and XhoI enzyme cuts qualification, sequence verification is carried out to positive colony, result shows that the described Cry2Ab nucleotides sequence inserted in recombinant cloning vector DBN01-T is classified as the nucleotide sequence shown in SEQ ID NO:2, and namely Cry2Ab nucleotide sequence correctly inserts.
According to the method for above-mentioned structure recombinant cloning vector DBN01-T, the described Cry1A.105 nucleotide sequence of synthesis is connected on cloning vector pGEM-T, obtain recombinant cloning vector DBN02-T, wherein, Cry1A.105 is Cry1A.105 nucleotide sequence (SEQ ID NO:4).Enzyme is cut and is correctly inserted with Cry1A.105 nucleotide sequence described in sequence verification recombinant cloning vector DBN02-T.
2, the recombinant expression carrier containing Cry2Ab gene is built
With restriction enzyme NcoI and SpeI respectively enzyme cut recombinant cloning vector DBN01-T and expression vector DBNBC-01 (carrier framework: pCAMBIA2301 (CAMBIA mechanism can provide)), between NcoI and the SpeI site Cry2Ab nucleotide sequence fragment cut being inserted into expression vector DBNBC-01, conventional enzymatic cleavage methods carrier construction is utilized to be well-known to those skilled in the art, be built into recombinant expression carrier DBN100744, it builds flow process (Kan: kanamycin gene as shown in Figure 2; RB: right margin; Ubi: corn Ubiquitin (ubiquitin) gene promoter (SEQ ID NO:5); Cry2Ab:Cry2Ab nucleotide sequence (SEQ ID NO:2); Nos: the terminator (SEQ ID NO:6) of rouge alkali synthetase gene; Hpt: hygromycin phosphotransferase gene (SEQ ID NO:7); LB: left margin).
By recombinant expression carrier DBN100744 heat shock method transformation of E. coli T1 competent cell, its hot shock condition is: 50 μ l Escherichia coli T1 competent cells, 10 μ l plasmid DNA (recombinant expression carrier DBN100744), 42 DEG C of water-baths 30 seconds; 37 DEG C of shaken cultivation 1 hour (under 100rpm rotating speed shaking table shake); Then at LB solid plate (the tryptone 10g/L containing 50mg/L kanamycin (Kanamycin), yeast extract 5g/L, NaCl 10g/L, agar 15g/L, adjust pH to 7.5 with NaOH) upper cultivation 12 hours under temperature 37 DEG C of conditions, picking white colony, at LB liquid nutrient medium (tryptone 10g/L, yeast extract 5g/L, NaCl 10g/L, kanamycin 50mg/L, with NaOH adjust pH to 7.5) under temperature 37 DEG C of conditions overnight incubation.Its plasmid of alkalinity extraction.The plasmid restriction enzyme NcoI of extraction and HindIII enzyme are cut rear qualification, and positive colony is carried out order-checking qualification, result shows that the nucleotides sequence of recombinant expression carrier DBN100744 between NcoI and SpeI site is classified as nucleotide sequence, i.e. Cry2Ab nucleotide sequence shown in SEQ ID NO:2 in sequence table.
According to the method for above-mentioned structure recombinant expression carrier DBN100744, NcoI and HindIII enzyme is cut the described Cry1A.105 nucleotide sequence insertion expression vector DBNBC-01 that recombinant cloning vector DBN02-T cuts, obtain recombinant expression carrier DBN100745.Enzyme is cut with the nucleotide sequence in sequence verification recombinant expression carrier DBN100745 containing nucleotide sequence shown in SEQ ID NO:4 in promising sequence table, i.e. Cry2Ab nucleotide sequence, described Cry2Ab nucleotide sequence can connect described Ubi promotor and Nos terminator.
According to the method for above-mentioned structure recombinant expression carrier DBN100744, by NcoI and HindIII, NcoI and SpeI respectively enzyme cut described Cry2Ab nucleotide sequence that recombinant cloning vector DBN01-T and DBN02-T cut and Cry1A.105 nucleotide sequence inserts expression vector DBNBC-01, obtain recombinant expression carrier DBN100029.Enzyme is cut with the nucleotide sequence in sequence verification recombinant expression carrier DBN100029 containing nucleotide sequence shown in SEQ ID NO:2 and SEQ ID NO:4 in promising sequence table, i.e. Cry2Ab nucleotide sequence and Cry1A.105 nucleotide sequence, described Cry2Ab nucleotide sequence can be connected described Ubi promotor and Nos terminator with described Cry1A.105 nucleotide sequence.
3, recombinant expression carrier transformation Agrobacterium
Through building correct recombinant expression carrier DBN100744, DBN100745 and DBN100029 liquid nitrogen method, Agrobacterium LBA4404 (Invitrgen is transformed into oneself, Chicago, USA, CAT:18313-015) in, its conversion condition is: 100 μ L Agrobacterium LBA4404s, 3 μ L plasmid DNA (recombinant expression carrier), be placed in liquid nitrogen 10 minutes, 37 DEG C of tepidarium 10 minutes, Agrobacterium LBA4404 after transforming is inoculated in LB test tube in temperature 28 DEG C, rotating speed is cultivate 2 hours under 200rpm condition, be applied on the LB flat board containing the rifampin (Rifampicin) of 50mg/L and the kanamycin (Kanamycin) of 100mg/L until grow positive monoclonal, picking Colony Culture also extracts its plasmid, with restriction enzyme A hdI and XhoI to recombinant expression carrier DBN100744, DBN100745 and DBN100029 enzyme carries out digestion verification after cutting, result shows recombinant expression carrier DBN100744, DBN100745 and DBN100029 structure is entirely true.
The acquisition of the 3rd embodiment, transfer-gen plant
1, transgenic corn plant is obtained
The Agrobacterium infestation method conveniently adopted, by the Agrobacterium Dual culture in the rataria of comprehensive for the corn variety of aseptic culture 31 (Z31) and the second embodiment described in 3, with the recombinant expression carrier DBN100744 by 2 structures in the second embodiment, T-DNA in DBN100745 and DBN100029 (comprises the promoter sequence of corn Ubiquitin gene, Cry2Ab nucleotide sequence, Cry1A.105 nucleotide sequence, Hpt gene and Nos terminator sequence) be transferred in maize chromosome group, obtain the milpa proceeding to Cry2Ab nucleotide sequence, proceed to the milpa of Cry1A.105 nucleotide sequence and proceed to the milpa of Cry1A.105-Cry2Ab nucleotide sequence, in contrast with wild-type corn plant simultaneously.
For agriculture bacillus mediated corn transformation, briefly, immature rataria is separated from corn, rataria is contacted with agrobacterium suspension, wherein Cry2Ab nucleotide sequence, Cry1A.105 nucleotide sequence and Cry1A.105-Cry2Ab nucleotide sequence can be passed at least one cell (step 1: infect step) of one of rataria by Agrobacterium, in this step, rataria preferably immerses agrobacterium suspension (OD 660=0.4-0.6, infect medium (MS salt 4.3g/L, MS vitamin, casein 300mg/L, sucrose 68.5g/L, glucose 36g/L, acetosyringone (AS) 40mg/L, 2,4-dichlorphenoxyacetic acid (2,4-D) 1mg/L, pH5.3)) in start inoculation.Rataria and Agrobacterium Dual culture one period (3 days) (step 2: Dual culture step).Preferably, rataria after infecting step at solid culture medium (MS salt 4.3g/L, MS vitamin, casein 300mg/L, sucrose 20g/L, glucose 10g/L, acetosyringone (AS) 100mg/L, 2,4-dichlorphenoxyacetic acid (2,4-D) 1mg/L, agar 8g/L, pH5.8) upper cultivation.After this Dual culture stage, optionally " recovery " step can be had.In " recovery " step, recovery media (MS salt 4.3g/L, MS vitamin, casein 300mg/L, sucrose 30g/L, 2,4-dichlorphenoxyacetic acid (2,4-D) 1mg/L, plant gel 3g/L, pH5.8) at least exist in a kind of oneself know suppress Agrobacterium growth antibiotic (cephalosporin), do not add the selective agent (step 3: recovering step) of vegetable transformant.Preferably, rataria is having antibiotic but is not having the solid culture medium of selective agent is cultivated, to eliminate Agrobacterium and to provide convalescence for infected cell.Then, the rataria of inoculation cultivates the transformed calli (step 4: select step) that also growth selection on the medium containing selective agent (hygromycin).Preferably, rataria is having the screening solid culture medium of selective agent (MS salt 4.3g/L, MS vitamin, casein 300mg/L, sucrose 5g/L, hygromycin 50mg/L, sucrose 30g/L, 2,4-dichlorphenoxyacetic acid (2,4-D) 1mg/L, plant gel 3g/L, pH5.8) upper cultivation, causes the cell selective growth transformed.Then, callus regeneration becomes plant (step 5: regeneration step), preferably, is above cultivating with aftergrowth at solid culture medium (MS differential medium and MS root media) containing the callus that the medium of selective agent grows.
Screening the resistant calli obtained transfers on described MS differential medium (MS salt 4.3g/L, MS vitamin, casein 300mg/L, sucrose 30g/L, 6-benzyladenine 2mg/L, plant gel 3g/L, pH5.8), cultivates differentiation at 25 DEG C.Differentiation seedling out transfers to described MS root media (MS salt 2.15g/L, MS vitamin, casein 300mg/L, sucrose 30g/L, indole-3-acetic acid 1mg/L, plant gel 3g/L, pH5.8) on, be cultured to about 10cm at 25 DEG C high, move to hot-house culture to solid.In greenhouse, every day cultivates 16 hours at 28 DEG C, then cultivates 8 hours at 20 DEG C.
2, Transgenic Sorghum plant is obtained
With reference to the Chinese sorghum method for transformation of Molecular Biology and Genetic Engineering ISSN 2053-5767.Collect the seed of sorghum variety APKI, and rinse for several times with clear water; To be soaked in tween-20 infiltrate 5 minutes; Suspend with distilled water afterwards and clean, and dry in fume hood; The surface of the seed 70% (v/v) ethanol disinfection 30 seconds, and then uses 0.1% (w/v) HgCl 2sterilize 6 minutes; Again with distilled water cleaning 5-6 time; Seed is laid in the culture dish containing MS basis solid culture medium (pH5.8), culture dish is put between the cultivation that temperature is 24 ± 2 DEG C, relative moisture is 70%, the photoperiod (light/dark) is 12:12; After 3-5 days, seed sprouting, gets Shoot tip explants and to be soaked in Agrobacterium 30 minutes; The explant taken out after soaking is put on sterilized filter paper; Dual culture 72 hours under dark condition; The sterile water wash of callus use containing 500mg/L cephalosporin 3-5 time; Callus after cleaning is transferred on inducing culture and cultivates 7 days; Transfer on screening and culturing base 2-3 week, repeat screening 3 times; Kanamycin-resistant callus tissue is transferred on regeneration culture medium; Regenerate blade etc., seedling is moved on root media, transplant after taking root in greenhouse.Culture medium prescription is with reference to Molecular Biology and Genetic EngineeringISSN 2053-5767, and wherein selective agent is used according to transgene carrier in the present invention, is replaced by hygromycin.Thereby is achieved the sorghum plant proceeding to Cry2Ab nucleotide sequence, the sorghum plant proceeding to Cry1A.105 nucleotide sequence and proceed to the sorghum plant of Cry1A.105-Cry2Ab nucleotide sequence; In contrast with wild type sorghum plant simultaneously.
3, transgenic sugarcane plant is obtained
Method for transformation Primary Reference Guangxi University 2012 grades of bright academic dissertations of master Lee the 22nd page to 24 pages.Get the newborn stipes in sugarcane top, remove the sugarcane tip and leaf sheath, leave stem apex vegetative cone and lobus cardiacus stem section.On superclean bench, cleaning disinfection is carried out with 75% (v/v) cotton ball soaked in alcohol effects on surface, lobus cardiacus skin is carefully peelled off with sterilized tweezers, get the lobus cardiacus section that middle 5-7cm is long, the thin slice that crosscut becomes thickness to be about 3mm is inoculated on inducing culture, under temperature 26 DEG C of conditions, dark culturing 20 days.Select the good callus of growing state and to transfer in new MS medium preculture 4 days, be used further to conversion test; During conversion, in superclean bench, the sterilized tweezers of callus to be infected are pressed from both sides out, be placed on above clean filter paper and leave standstill 2 hours, to surperficial bone dry, slightly shrink; The sugarcane callus of drying is put into and infects liquid immersion 30 minutes, be placed on shaking table simultaneously and slowly shake; Callus pulled out and transfer on clean filter paper, drying up completely in superclean bench, until callus dry tack free, without moisture film.Callus lines is cut into the fritter of 0.6*0.6cm, transfers in the MR solid culture medium containing 100 μm of ol/L acetosyringones (AS) afterwards, temperature 23 DEG C of light culture 3 days; Callus after infecting is pressed from both sides out, is placed on filter paper and dries up on superclean bench, until material surface dry and comfortable after, by material transfer in the differential medium containing 500mg/L cephalosporin and hygromycin selection; Every 2 weeks change a subculture, period rejects contaminated callus, when seedling be about 3cm high time, transfer to root induction in the root media containing hygromycin selection agent.Thereby is achieved proceed to Cry2Ab nucleotide sequence sugarcane plant, proceed to the sugarcane plant of Cry1A.105 nucleotide sequence and proceed to the sugarcane plant of Cry1A.105-Cry2Ab nucleotide sequence; In contrast with wild type sugarcane plant simultaneously.
4th embodiment, verify transfer-gen plant with TaqMan
The blade getting the milpa proceeding to Cry2Ab nucleotide sequence, the milpa proceeding to Cry1A.105 nucleotide sequence and the milpa that proceeds to Cry1A.105-Cry2Ab nucleotide sequence is respectively about 100mg as sample, extract its genomic DNA with the DNeasy Plant Maxi Kit of Qiagen, detected the copy number of Cry2Ab gene and Cry1A.105 gene by Taqman fluorescence probe quantitative PCR method.In contrast with wild-type corn plant, carry out detection according to the method described above to analyze simultaneously.3 repetitions are established in experiment, average.
The concrete grammar detecting Cry2Ab gene and Cry1A.105 gene copy number is as follows:
Step 11, get each 100mg of blade of the milpa proceeding to Cry2Ab nucleotide sequence, the milpa proceeding to Cry1A.105 nucleotide sequence, the milpa proceeding to Cry1A.105-Cry2Ab nucleotide sequence and wild-type corn plant respectively, in mortar, be ground into homogenate with liquid nitrogen respectively, 3 repetitions got by each sample;
The DNeasy Plant Mini Kit of step 12, use Qiagen extracts the genomic DNA of above-mentioned sample, and concrete grammar is with reference to its product description;
Step 13, measure the genomic DNA concentration of above-mentioned sample with NanoDrop 2000 (Thermo Scientific);
Step 14, adjust the genomic DNA concentration of above-mentioned sample to same concentration value, the scope of described concentration value is 80-100ng/ μ l;
The copy number of step 15, employing Taqman fluorescence probe quantitative PCR method qualification sample, using the sample through qualification known copy number as standard items, with the sample of wild-type corn plant in contrast, the repetition of 3, each sample, gets its mean value; Fluorescence quantification PCR primer and probe sequence be respectively:
Following primer and probe are used for detecting Cry2Ab nucleotide sequence:
Primer 1:CTGATACCCTTGCTCGCGTC is as shown in SEQ ID NO:8 in sequence table;
Primer 2: CACTTGGCGGTTGAACTCCTC is as shown in SEQ ID NO:9 in sequence table;
Probe 1:CGCTGAGCTGACGGGTCTGCAAG is as shown in SEQ ID NO:10 in sequence table;
Following primer and probe are used for detecting Cry1A.105 nucleotide sequence:
Primer 3:GCGCATCCAGTTCAACGAC is as shown in SEQ ID NO:11 in sequence table;
Primer 4:GTTCTGGACGGCGAAGAGTG is as shown in SEQ ID NO:12 in sequence table;
Probe 2:TGAACAGCGCCCTGACCACCG is as shown in SEQ ID NO:13 in sequence table;
PCR reaction system is:
Described 50 × primer/probe mixture comprises each 45 μ l of often kind of primer of 1mM concentration, the probe 50 μ l of 100 μMs of concentration and 860 μ l 1 × TE buffer solutions, and at 4 DEG C, is housed in amber tube.
PCR reaction condition is:
SDS2.3 software (Applied Biosystems) is utilized to analyze data.
Experimental result shows, all oneself is incorporated in the chromosome set of detected milpa for Cry2Ab nucleotide sequence, Cry1A.105 nucleotide sequence and Cry1A.105-Cry2Ab nucleotide sequence, and proceeds to the transgenic corn plant that the milpa of Cry2Ab nucleotide sequence, the milpa proceeding to Cry1A.105 nucleotide sequence and the milpa that proceeds to Cry1A.105-Cry2Ab nucleotide sequence all obtain single copy.
Verify the method for transgenic corn plant according to above-mentioned TaqMan, detection is carried out to Transgenic Sorghum plant and transgenic sugarcane plant plant and analyzes.Experimental result shows, Cry2Ab nucleotide sequence, all oneself is incorporated in the chromosome set of detected sorghum plant and sugarcane plant respectively for Cry1A.105 nucleotide sequence and Cry1A.105-Cry2Ab nucleotide sequence, and proceed to the sorghum plant of Cry2Ab nucleotide sequence, proceed to the sorghum plant of Cry1A.105 nucleotide sequence, proceed to the sorghum plant of Cry1A.105-Cry2Ab nucleotide sequence, proceed to the sugarcane plant of Cry2Ab nucleotide sequence, the sugarcane plant proceeding to Cry1A.105 nucleotide sequence and the sugarcane plant proceeding to Cry1A.105-Cry2Ab nucleotide sequence all obtain the transfer-gen plant of single copy.
The insect resistant effect of the 5th embodiment, transfer-gen plant detects
By proceed to Cry2Ab nucleotide sequence milpa, proceed to the milpa of Cry1A.105 nucleotide sequence, proceed to the milpa of Cry1A.105-Cry2Ab nucleotide sequence; The sorghum plant proceeding to the sorghum plant of Cry2Ab nucleotide sequence, proceed to the sorghum plant of Cry1A.105 nucleotide sequence, proceed to Cry1A.105-Cry2Ab nucleotide sequence; The sugarcane plant proceeding to Cry2Ab nucleotide sequence, the sugarcane plant proceeding to Cry1A.105 nucleotide sequence, proceed to the sugarcane plant of Cry1A.105-Cry2Ab nucleotide sequence; Corresponding wild-type corn plant, sorghum plant and sugarcane plant, and be accredited as not genetically modified milpa, sorghum plant and sugarcane plant through Taqman insect resistant effect detection is carried out to striped stem borer.
1, the insect resistant effect of transgenic corn plant detects
Get the milpa proceeding to Cry2Ab nucleotide sequence respectively, proceed to the milpa of Cry1A.105 nucleotide sequence, proceed to the milpa of Cry1A.105-Cry2Ab nucleotide sequence, wild-type corn plant and be accredited as the fresh blade of not genetically modified milpa (expansion tender leaf) through Taqman, clean and with gauze, the water on blade is blotted with aseptic water washing, then maize leaf is cut into the strip of about 1cm × 2cm, get 1 cut after strip blade put on the moisturizing filter paper bottom round plastic culture dish, 10 striped stem borers (newly hatched larvae) are put in each culture dish, after worm examination culture dish is added a cover, at temperature 22-26 DEG C, relative moisture 70%-80%, place after 3 days under the condition of photoperiod (light/dark) 0:24, according to striped stem borer larvae development progress, lethality and blade injury rate three indexs, obtain resistance total score (full marks 300 points): resistance total score=100 × lethality+[100 × lethality+90 × (just incubate borer population/connect worm sum)+60 × (just incubate-negative control borer population/connect worm sum)+10 × (negative control borer population/connect worm sum)]+100 × (1-blade injury rate).Proceed to totally 3 transformation event strains (S1, S2 and S3) of Cry2Ab nucleotide sequence, proceed to totally 3 transformation event strains (S4, S5 and S6) of Cry1A.105 nucleotide sequence, proceed to totally 3 transformation event strains (S7, S8 and S9) of Cry1A.105-Cry2Ab nucleotide sequence, not genetically modified (NGM1) totally 1 strain is accredited as, (CK1) totally 1 strain of wild type through Taqman; Select 3 strains to test from each strain, every strain repeats 6 times.Result is as shown in table 1 and Fig. 3.
The pest-resistant experimental result of table 1, transgenic corn plant inoculation striped stem borer
The result of table 1 shows: the milpa proceeding to the milpa of Cry2Ab nucleotide sequence, proceed to the milpa of Cry1A.105 nucleotide sequence and proceed to Cry1A.105-Cry2Ab nucleotide sequence all has good insecticidal effect to striped stem borer, the average mortality of striped stem borer can reach more than 70% substantially, and its resistance total score also can reach substantially all at about 250 points; And be accredited as the resistance total score of not genetically modified milpa and wild-type corn plant generally at about 20 points through Taqman.
The result of Fig. 3 shows: compared with wild-type corn plant, the milpa proceeding to the milpa of Cry2Ab nucleotide sequence, proceed to the milpa of Cry1A.105 nucleotide sequence and proceed to Cry1A.105-Cry2Ab nucleotide sequence can cause the mortality of striped stem borer newly hatched larvae, and great suppression is caused to a small amount of survival larvae development progress, hypoevolutism, shows extremely weak vitality simultaneously; And proceed to the milpa of Cry2Ab nucleotide sequence, the milpa proceeding to Cry1A.105 nucleotide sequence and the milpa that proceeds to Cry1A.105-Cry2Ab nucleotide sequence is only subject to slight damage substantially, taken food area very little, its blade injury rate is all below 10%.
Prove that the milpa proceeding to the milpa of Cry2Ab nucleotide sequence, the milpa proceeding to Cry1A.105 nucleotide sequence and proceed to Cry1A.105-Cry2Ab nucleotide sequence all demonstrates the activity of high resistance striped stem borer thus, this activity is enough to the growth of striped stem borer is produced to ill effect thus makes it be controlled in field.Brill moth simultaneously by controlling striped stem borer is caused harm, and also likely reduces the generation of disease on corn, improves the Yield and qualities of corn greatly.
2, the insect resistant effect of transgenic sugarcane plant detects
Get the sugarcane plant proceeding to Cry2Ab nucleotide sequence respectively, proceed to the sugarcane plant of Cry1A.105 nucleotide sequence, proceed to the sugarcane plant of Cry1A.105-Cry2Ab nucleotide sequence, wild type sugarcane plant and be accredited as the fresh blade of not genetically modified sugarcane plant (expansion tender leaf) through Taqman, clean and with gauze, the water on blade is blotted with aseptic water washing, then Sugarcane Leaves is cut into the strip of about 1cm × 2cm, get 1 cut after strip blade put on the moisturizing filter paper bottom round plastic culture dish, 10 striped stem borers (newly hatched larvae) are put in each culture dish, after worm examination culture dish is added a cover, at temperature 22-26 DEG C, relative moisture 70%-80%, place after 3 days under the condition of photoperiod (light/dark) 0:24, according to striped stem borer larvae development progress, lethality and blade injury rate three indexs, obtain resistance total score (full marks 300 points): resistance total score=100 × lethality+[100 × lethality+90 × (just incubate borer population/connect worm sum)+60 × (just incubate-negative control borer population/connect worm sum)+10 × (negative control borer population/connect worm sum)]+100 × (1-blade injury rate).Proceed to totally 3 transformation event strains (S10, S11 and S12) of Cry2Ab nucleotide sequence, proceed to totally 3 transformation event strains (S13, S14 and S15) of Cry1A.105 nucleotide sequence, proceed to totally 3 transformation event strains (S16, S17 and S18) of Cry1A.105-Cry2Ab nucleotide sequence, not genetically modified (NGM2) totally 1 strain is accredited as, (CK2) totally 1 strain of wild type through Taqman; Select 3 strains to test from each strain, every strain repeats 6 times.Result is as shown in table 2.
The pest-resistant experimental result of table 2, transgenic sugarcane plant inoculation striped stem borer
The result of table 2 shows: the sugarcane plant proceeding to Cry2Ab nucleotide sequence, the sugarcane plant proceeding to Cry1A.105 nucleotide sequence and the sugarcane plant proceeding to Cry1A.105-Cry2Ab nucleotide sequence all have good insecticidal effect to striped stem borer, the average mortality of striped stem borer is substantially all more than 80%, and its resistance total score is also substantially all at about 250 points; And be accredited as the resistance total score of not genetically modified sugarcane plant and wild type sugarcane plant generally below 50 points through Taqman.
Compared with wild type sugarcane plant, proceed to the sugarcane plant of Cry2Ab nucleotide sequence, the sugarcane plant proceeding to Cry1A.105 nucleotide sequence and the sugarcane plant proceeding to Cry1A.105-Cry2Ab nucleotide sequence can cause the mortality of striped stem borer newly hatched larvae, and obvious suppression is caused to a small amount of survival larvae development progress, growth retardation, show more weak vitality simultaneously, and proceed to the sugarcane plant of Cry2Ab nucleotide sequence, the sugarcane plant proceeding to Cry1A.105 nucleotide sequence and the sugarcane plant proceeding to Cry1A.105-Cry2Ab nucleotide sequence are only subject to slight damage substantially, taken food area very little, its blade injury rate is all below 10%.
Prove that the sugarcane plant proceeding to the sugarcane plant of Cry2Ab nucleotide sequence, the sugarcane plant proceeding to Cry1A.105 nucleotide sequence and proceed to Cry1A.105-Cry2Ab nucleotide sequence all demonstrates the activity of high resistance striped stem borer thus, this activity is enough to the growth of striped stem borer is produced to ill effect thus makes it be controlled in field.Brill moth simultaneously by controlling striped stem borer is caused harm, and also likely reduces the generation of disease on sugarcane, improves the Yield and qualities of sugarcane greatly.
3, the insect resistant effect of Transgenic Sorghum plant detects
Get the sorghum plant proceeding to Cry2Ab nucleotide sequence respectively, proceed to the sorghum plant of Cry1A.105 nucleotide sequence, proceed to the sorghum plant of Cry1A.105-Cry2Ab nucleotide sequence, wild type sorghum plant and be accredited as the fresh blade of not genetically modified sorghum plant (expansion tender leaf) through Taqman, clean and with gauze, the water on blade is blotted with aseptic water washing, then Sorghum Leaves is cut into the strip of about 1cm × 2cm, get 1 cut after strip blade put on the moisturizing filter paper bottom round plastic culture dish, 10 striped stem borers (newly hatched larvae) are put in each culture dish, after worm examination culture dish is added a cover, at temperature 22-26 DEG C, relative moisture 70%-80%, place after 3 days under the condition of photoperiod (light/dark) 0:24, according to striped stem borer larvae development progress, lethality and blade injury rate three indexs, obtain resistance total score (full marks 300 points): resistance total score=100 × lethality+[100 × lethality+90 × (just incubate borer population/connect worm sum)+60 × (just incubate-negative control borer population/connect worm sum)+10 × (negative control borer population/connect worm sum)]+100 × (1-blade injury rate).Proceed to totally 3 transformation event strains (S19, S20 and S21) of Cry2Ab nucleotide sequence, proceed to totally 3 transformation event strains (S22, S23 and S24) of Cry1A.105 nucleotide sequence, proceed to totally 3 transformation event strains (S25, S26 and S27) of Cry1A.105-Cry2Ab nucleotide sequence, not genetically modified (NGM3) totally 1 strain is accredited as, (CK3) totally 1 strain of wild type through Taqman; Select 3 strains to test from each strain, every strain repeats 6 times.Result is as shown in table 3.
The pest-resistant experimental result of table 3, Transgenic Sorghum plant inoculation striped stem borer
The result of table 3 shows: the sorghum plant proceeding to the sorghum plant of Cry2Ab nucleotide sequence, proceed to the sorghum plant of Cry1A.105 nucleotide sequence and proceed to Cry1A.105-Cry2Ab nucleotide sequence all has good insecticidal effect to striped stem borer, the average mortality of striped stem borer is substantially all more than 70%, and its resistance total score is also substantially all more than 270 points; And be accredited as the resistance total score of not genetically modified sorghum plant and wild type sorghum plant generally at about 20 points through Taqman.
Compared with wild type sorghum plant, proceed to the sorghum plant of Cry2Ab nucleotide sequence, the sorghum plant proceeding to Cry1A.105 nucleotide sequence and the sorghum plant proceeding to Cry1A.105-Cry2Ab nucleotide sequence can cause the mortality of striped stem borer newly hatched larvae, and obvious suppression is caused to a small amount of survival larvae development progress, growth retardation, show very weak vitality simultaneously, and proceed to the sorghum plant of Cry2Ab nucleotide sequence, the sorghum plant proceeding to Cry1A.105 nucleotide sequence and the sorghum plant proceeding to Cry1A.105-Cry2Ab nucleotide sequence are only subject to slight damage substantially, taken food area very little, its blade injury rate is all below 10%.
Prove that the sorghum plant proceeding to the sorghum plant of Cry2Ab nucleotide sequence, the sorghum plant proceeding to Cry1A.105 nucleotide sequence and proceed to Cry1A.105-Cry2Ab nucleotide sequence all demonstrates the activity of high resistance striped stem borer thus, this activity is enough to the growth of striped stem borer is produced to ill effect thus makes it be controlled in field.Brill moth simultaneously by controlling striped stem borer is caused harm, and also likely reduces the generation of disease on Chinese sorghum, improves the Yield and qualities of Chinese sorghum greatly.
Above-mentioned experimental result also shows the milpa proceeding to Cry2Ab nucleotide sequence, proceed to the milpa of Cry1A.105 nucleotide sequence, proceed to the milpa of Cry1A.105-Cry2Ab nucleotide sequence, proceed to the sugarcane plant of Cry2Ab nucleotide sequence, proceed to the sugarcane plant of Cry1A.105 nucleotide sequence, proceed to the sugarcane plant of Cry1A.105-Cry2Ab nucleotide sequence, proceed to the sorghum plant of Cry2Ab nucleotide sequence, the sorghum plant proceeding to Cry1A.105 nucleotide sequence and the control/control of the sorghum plant proceeding to Cry1A.105-Cry2Ab nucleotide sequence to striped stem borer are obviously because plant itself can produce Cry2Ab albumen, so, well known to those skilled in the art, according to the identical toxic action of Cry2Ab albumen to striped stem borer, the transfer-gen plant that can produce similar expressed Cry2Ab albumen can be used in the harm controlling/prevent and treat striped stem borer.In the present invention, Cry2Ab albumen includes but not limited to the Cry2Ab albumen of given amino acid sequence in embodiment, transfer-gen plant can also produce the second insect-killing protein that at least one is different from Cry2Ab albumen, as Cry1Fa albumen, Cry1A.105 albumen or Vip3A albumen etc. simultaneously.
In sum, the purposes of insecticidal proteins of the present invention controls striped stem borer insect by producing the Cry2Ab albumen that can kill striped stem borer in plant corpus; The cultural control method used with prior art, chemical prevention and control method are compared with physical control method; the present invention to plant carry out the time of infertility, whole plant protection to prevent and treat the infringement of striped stem borer insect; and pollution-free, noresidue, effect stability, thoroughly, simple, convenient, economical.
It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not depart from the spirit and scope of technical solution of the present invention.

Claims (17)

1. control a method for striped stem borer insect, it is characterized in that, comprise by striped stem borer insect at least with Cry2Ab protein contact.
2. the method for control striped stem borer insect according to claim 1, it is characterized in that, described Cry2Ab albumen is present in the host cell at least producing described Cry2Ab albumen, described striped stem borer insect by ingest described host cell at least with described Cry2Ab protein contact.
3. the method for control striped stem borer insect according to claim 2, it is characterized in that, described Cry2Ab albumen is present in the bacterium or genetically modified plants at least producing described Cry2Ab albumen, described striped stem borer insect by ingest described bacterium or genetically modified plants organize at least with described Cry2Ab protein contact, after contact, described striped stem borer insect growth is suppressed and/or causes death, to realize the control to striped stem borer harm plant.
4. the method for control striped stem borer insect according to claim 3, it is characterized in that, described plant is from corn, Chinese sorghum, sugarcane, grain, fiber crops or the seed of Job's tears.
5. the method for the control striped stem borer insect according to any one of claim 2 to 4, is characterized in that, the step before described contact procedure is the plant of the polynucleotides of plantation containing the described Cry2Ab albumen of coding.
6. the method for the control striped stem borer insect according to any one of claim 1 to 5, is characterized in that, the amino acid sequence of described Cry2Ab albumen has the amino acid sequence shown in SEQ ID NO:1.
7. the method for control striped stem borer insect according to claim 6, it is characterized in that, the nucleotide sequence of described Cry2Ab albumen has the nucleotide sequence shown in SEQ ID NO:2.
8. the method for the control striped stem borer insect according to any one of claim 2 to 7, is characterized in that, described plant can also comprise the second nucleotide that at least one is different from the nucleotide of described Cry2Ab albumen of encoding.
9. the method for control striped stem borer insect according to claim 8, is characterized in that, described the second nucleotide coding Cry class insect-killing protein, Vip class insect-killing protein, protease inhibitors, agglutinin, α-amylase or peroxidase.
10. the method for control striped stem borer insect according to claim 9, is characterized in that, described the second nucleotide coding Cry1A.105 albumen.
The method of 11. control striped stem borer insects according to claim 10, it is characterized in that, the amino acid sequence of described Cry1A.105 albumen has the amino acid sequence shown in SEQ ID NO:3.
The method of 12. control striped stem borer insects according to claim 11, it is characterized in that, described the second nucleotide has the nucleotide sequence shown in SEQ ID NO:4.
The method of 13. control striped stem borer insects according to claim 8, it is characterized in that, described the second nucleotide is the dsRNA suppressing important gene in target insect pests.
14. 1 kinds of Cry2Ab protein control the purposes of striped stem borer insect.
15. 1 kinds of methods producing the plant controlling striped stem borer insect, is characterized in that, comprise the polynucleotide sequence introducing coding Cry2Ab albumen in the genome of described plant.
16. 1 kinds of methods producing the propagulum controlling striped stem borer insect, it is characterized in that, comprise and the first plant obtained by method described in claim 15 and the second plant are hybridized, and/or the tissue taken off by the plant of method acquisition described in claim 15 having fertility is cultivated, thus produce the propagulum of the polynucleotide sequence containing coding Cry2Ab albumen.
17. 1 kinds of methods of cultivating the plant controlling striped stem borer insect, is characterized in that, comprising:
Plant at least one brood body, the genome of described brood body comprises the polynucleotide sequence of coding Cry2Ab albumen;
Described brood body is made to grow up to plant;
Described plant is grown under artificial infection striped stem borer insect and/or the abiogenous condition of striped stem borer insect, there is compared with the plant of gathering in the crops the polynucleotide sequence with other without Cry2Ab albumen of encoding the plant of the plant injury weakened and/or the plant products with increase.
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WO2016184397A1 (en) * 2015-05-20 2016-11-24 北京大北农科技集团股份有限公司 Application of insecticidal protein
CN106591352A (en) * 2016-11-21 2017-04-26 北京大北农科技集团股份有限公司 Insecticide protein composition and method thereof for managing insect resistance

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CN101495635B (en) * 2006-05-26 2017-05-17 孟山都技术有限公司 Corn plant and seed corresponding to transgenic event MON89034 and methods for detection and use thereof
CN104286014B (en) * 2014-08-27 2016-03-23 北京大北农科技集团股份有限公司 The purposes of insecticidal proteins
CN104920425B (en) * 2015-05-20 2018-06-19 北京大北农科技集团股份有限公司 The purposes of insecticidal proteins

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WO2016138818A1 (en) * 2015-03-04 2016-09-09 北京大北农科技集团股份有限公司 Uses of insecticidal protein
WO2016184397A1 (en) * 2015-05-20 2016-11-24 北京大北农科技集团股份有限公司 Application of insecticidal protein
CN106591352A (en) * 2016-11-21 2017-04-26 北京大北农科技集团股份有限公司 Insecticide protein composition and method thereof for managing insect resistance
CN106591352B (en) * 2016-11-21 2020-05-05 北京大北农科技集团股份有限公司 Insecticidal protein combinations and methods of managing insect resistance

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