CN103834578B - Endogenetic fungal bacterial strain YCEF193 and uses thereof - Google Patents
Endogenetic fungal bacterial strain YCEF193 and uses thereof Download PDFInfo
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Abstract
The present invention relates to a kind of endogenetic fungal bacterial strain YCEF193, and it absorbs the purposes in heavy metal at Promoting plant growth and reduction tobacco, belongs to microorganism and microbe application field.A kind of endogenetic fungal bacterial strain Pyrenochaetasp.YCEF193, depositary institution: China typical culture collection center, preservation address: Wuhan, China Wuhan University, deposit number: CCTCC NO:M2013595, November 24 2013 preservation time.Endogenetic fungal bacterial strain Pyrenochaetasp.YCEF193 of the present invention has obvious growth promoting effects effect to tobacco, or increases the biomass of plant, is called for short growth-promoting functions.Simultaneously by measuring the content of heavy metal element cadmium in blade, endogenetic fungal bacterial strain Pyrenochaetasp.YCEF193 has obvious effect in the heavy metal content reducing tobacco, compare control group, in the experimental group of process, the content of heavy metal Cd cadmium have dropped 23.52%.
Description
Technical field
The present invention relates to a kind of endogenetic fungal bacterial strain YCEF193, and it absorbs the purposes in heavy metal at Promoting plant growth and reduction tobacco, belongs to microorganism and microbe application field.
Background technology
Smoking and health are the hot issues of domestic and international extensive concern, reduce the focus that tobacco product objectionable constituent are tobacco industry developments in science and technology.Heavy metal in tobacco leaf and flue gas is one of most important objectionable constituent, and tobacco diseases also has a strong impact on tobacco production and Flue-cured tobacco Quality in addition.And tobacco agriculture has material impact to tobacco leaf objectionable constituent and quality of tobacco, utilize Agricultural biotechnologies to regulate and control, reduce the background concentration of tobacco leaf objectionable constituent as far as possible, reduce tobacco product to the object of human health risk to reach.
Containing detection device for multi metallic elements in tobacco, as arsenic, cadmium, lead, mercury etc., in aspiration procedure, these heavy metals enter human body by main flume, cause potential harm to human body.Tobacco is to the extremely strong crop of cadmium transfer ability, and in tobacco, cadmium content is than high times of its soil grown, and cadmium is almost suitable at the various position leaves content of ripe cigarette strain, and minimum in root, and in tobacco leaf, Cadmium accumulation amount accounts for the 79-96% of integral dose.
Endogenetic fungus (endophytic fungi) namely at least the part of the life history can infect and surely grow in health plant tissue, host is without class fungi (Petrini, 1991 of obvious illness; Wilson, 1995), to be only present in root system of plant different from mycorrhizal fungi, and endogenetic fungus can exist (Faeth & Fagan, 2002) at any histoorgan of the underground and aboveground of plant.Endogenetic fungus is extensively present in plant tissue, not by the impact of external environment, has biological action widely to growth and development of plants, opposing disease and pest etc., simultaneously significant in the widespread use of some plants and farm crop.Continuous worsening along with environmental problem, plant resources undergos acid test, and the impact of endogenetic fungus on plant is many-sided, has become one of hot issue that Now Domestic studies outward.Important realistic meaning is had in the development of agriculture production, ecological protection, natural resources of Chinese medicinal materials exploitation, medical and health.In recent years, it is found that to there is useful endogenetic bacteria and endogenetic fungus at plant materials, the preventive and therapeutic effect of endogenous strains on plant disease and biological Application and Development have caused the extensive concern of scientist.Plant endogenesis epiphyte is mainly distributed in the seed of plant, flower, stem, in leaf and root system, reciprocal symbiosis with the relation of plant, and plant endogenesis epiphyte can provide photosynthate and mineral substance, endogenous fungus metabolite can stimulate growing of host plant, improve host plant biology stress with abiotic stress resistance ability, namely there is material between the two to exchange with the circulation of energy, plant endogenesis epiphyte is to the growgh promoting effects energetically of host plant, part is that the active substance or secondary metabolite secreted by plant endogenesis epiphyte are to the result of the growth of plant.What current research was more is root nodule symbiote and mycorrhizas homobium, and the symbiote of endogenetic fungus and plant is another manifestation of higher plant and microorganisms symbiosis relation.
Endogenetic fungus and the mutual of plant study the concern being day by day subject to investigator, and become the international focus of endogenetic fungus research field.Tobacco is as the important cash crop of China, and in occupation of irreplaceable status in national economy, the raising of tobacco production and quality is the basis that tobacco industry develops in a healthy way.By studying the interaction of endogenetic fungus and tobacco, the syntaxial system of research endogenetic fungus and tobacco is significant.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of endogenetic fungal bacterial strain
pyrenochaetasp.YCEF193 and uses thereof.
In order to solve the problems of the technologies described above, the invention provides a kind of endogenetic fungal bacterial strain
pyrenochaetasp.YCEF193, depositary institution: China typical culture collection center, preservation address: Wuhan, China Wuhan University, deposit number: CCTCC NO:M 2013595, November 24 2013 preservation time.
Endogenetic fungal bacterial strain
pyrenochaetathe feature of sp.YCEF193 is: this strain growth speed is medium, and on PDA, 25 DEG C of light culture colony diameter of 7 days is 5cm; PDA Initial stage of culture white, maturation culture thing is olive colour or grey; Aerial hyphae is dense, mycelia have every, colourless, diameter is about 2.0-2.3 um.Pycnidium, conidium are showed no.
Bacterial strain
pyrenochaetasp.YCEF193 derives from the endogenetic fungus of tobacco, belongs to mycota Fungi, Ascomycota Ascomycota, seat capsule Gammaproteobacteria Dothideomycetes, lattice spore chamber Zoopagales Pleosporales, lattice spore chamber Cordycepps Pleosporaceae, Pyrenochaeta
pyrenochaeta.
The invention provides the complete sequence of the Internal Transcribed Spacer rDNA of endogenetic fungal bacterial strain YCEF193 as shown in SEQ ID NO:1.
The present invention also provides above-mentioned endogenetic fungal bacterial strain
pyrenochaetathe purposes of sp.YCEF193: Promoting plant growth or increase biomass.
The growth of promotion plant of the present invention comprises tobacco.
The present invention also provides above-mentioned endogenetic fungal bacterial strain simultaneously
pyrenochaetathe purposes of sp.YCEF193: the content reducing heavy metal in plant.
As endogenetic fungal bacterial strain of the present invention
pyrenochaetathe improvement of the purposes of sp.YCEF193: described plant is tobacco.
Endogenetic fungal bacterial strain in the present invention
pyrenochaetasp.YCEF193 is for the reducing effect of heavy metal content in tobacco, and main portions is tobacco leaf.
Endogenetic fungal bacterial strain described in the present invention
pyrenochaetathe purposes of sp.YCEF193 is improved: described bacterial strain reduces the content of cadmium in tobacco leaf.
Endogenetic fungal bacterial strain of the present invention
pyrenochaetasp.YCEF193 has obvious growth promoting effects effect to tobacco, or increases the biomass of plant, is called for short growth-promoting functions.Simultaneously by measuring the content of heavy metal element cadmium in blade, endogenetic fungal bacterial strain
pyrenochaetasp.YCEF193 has obvious effect in the heavy metal content reducing tobacco, and compare control group, in the experimental group of process, the content of heavy metal Cd cadmium have dropped 23.52%.
Accompanying drawing explanation
Fig. 1 is
pyrenochaetathe colonial morphology of sp.YCEF193 on PDA substratum.
Fig. 2 is
pyrenochaetasp.YCEF193 and the cloud and mist 87 Dual culture photo of two weeks, compared with the control,
pyrenochaetasp.YCEF193 has obvious growth-promoting functions.
Fig. 3 is
pyrenochaetasp.YCEF193 moves into potted plant growth 2 months, grows the photo of 30 days after having processed heavy metal solution, compared with the control,
pyrenochaetathe tobacco of sp.YCEF193 process grows fine.
biological deposits is stated
Endogenetic fungal bacterial strain
pyrenochaetasp.YCEF193, depositary institution: China typical culture collection center, preservation address: Wuhan, China Wuhan University, deposit number: CCTCC NO:M 2013595, November 24 2013 preservation time.
Embodiment
With reference to above-mentioned accompanying drawing, the specific embodiment of the present invention is described in detail.
Remarks illustrate: following all substratum all need to carry out in a conventional manner the sterilising treatment (121 DEG C, 0.24 MPa, 20 minutes) of High Temperature High Pressure before using.
embodiment 1, endogenetic fungal bacterial strain
pyrenochaetasp.YCEF193 is separated acquisition
2% wort agar substratum (malt extract agar, MEA): leach adding distil water in powder 20g, agar 20g at Fructus Hordei Germinatus and be settled to 1000 mL; Then conventional high-temperature sterilization (1.1 normal atmosphere, sterilizing 20min at 121 DEG C) is carried out.
Potato dextrose agar (potato dextrose agar, PDA): adding distil water is settled to 1000 mL in potato 200g, glucose 20g, agar 20g; Then conventional high-temperature sterilization (1.1 normal atmosphere, sterilizing 20min at 121 DEG C) is carried out.
Tennessee86(American Burley tobacco cultivar is gathered with Yunnan tobacco kind garden) for vegetable material, by clean with tap water rinse for the tobacco gathered, tobacco rhizome is at 75%(v/v) sterilization 30 seconds in spirituous solution, then at 1%(v/v) sterilization 10 points of kinds in chlorine bleach liquor, rinsed with sterile water 3 times.By sterile razor blade, root is cut into the long fragment of about 0.6cm, be placed on 2% wort agar substratum (MEA) plate containing 50 μ gml-1 penbritins and 50 μ gml-1 Streptomycin sulphates, 25 DEG C of light culture, after mycelia grows, move mycelia top and receive PDA substratum; Separation obtains bacterium colony, 25 DEG C of light culture, and on PDA substratum, continuous three inoculations, confirm as single bacterium colony, do not have other fungies or bacterium syntrophism, think to obtain pure culture, called after YCEF193.
Strain number is
pyrenochaetasp.YCEF193, depositary institution: China typical culture collection center, preservation address: Wuhan, China Wuhan University, deposit number: CCTCC NO:M 2013595, November 24 2013 preservation time.
embodiment 2, endogenetic fungal bacterial strain
pyrenochaetathe identification of morphology of sp.YCEF193
Of the present invention
pyrenochaetasp.YCEF193(namely
pyrenochaetasp.YCEF193 CCTCC NO:M 2013595) there is following characteristic:
pyrenochaetathe form of sp.YCEF193 on PDA substratum as shown in Figure 1.The suitable growth temperature of this endogenetic fungus on PDA substratum is 25 DEG C, has following characteristics: this bacterial strain belongs to mycota Fungi, Ascomycota Ascomycota, seat capsule Gammaproteobacteria Dothideomycetes, lattice spore chamber Zoopagales Pleosporales, lattice spore chamber Cordycepps Pleosporaceae, Pyrenochaeta
pyrenochaeta.This strain growth speed is medium, and on PDA, 25 DEG C of light culture colony diameter of 7 days is 5cm; PDA Initial stage of culture white, maturation culture thing is olive colour or grey; Aerial hyphae is dense, mycelia have every, colourless, diameter is about 2.0-2.3 um.Pycnidium, conidium are showed no.
embodiment 3, endogenetic fungal bacterial strain
pyrenochaetathe Molecular Identification of sp.YCEF193
DNA is extracted with the rapid fractionation method of fungal gene.The universal primer ITS-4 ('-TCCTCCGCTTATTGATATGC-3 ') adopting ITS to increase and ITS1 (5 '-TCCGTAGGTGAACCTGCGG-3 ') carry out pcr amplification, pcr amplification reaction adopts the reaction system of 50ul: ddH2O39.5ul, 10*PCR Buffer (withMg2+) 5ul, 10mmol/L dNTP 0.4ul, 20 μm of ol/L Primer-F 0.8ul, 20 μm of ol/L Primer-R 0.5ul, DNA profiling 3ul, 5U/ul Taq polysaccharase 0.8ul.PCR system is: PCR reaction conditions is: 94 DEG C of denaturation 4min, 94 DEG C of sex change 30s, 59 DEG C of annealing 40s, and 72 DEG C extend 60s, and after 35 circulations, 72 DEG C extend 10min.Reaction terminates rear use 1.0% agarose gel analysis amplified production.Through the order-checking of Shanghai Sheng Gong biotechnology company limited after PCR primer reclaims, obtain its ITS sequence, the complete sequence of the Internal Transcribed Spacer rDNA of endogenetic fungal bacterial strain YCEF193 is as shown in SEQ ID NO:1.Sequencing result carries out homologous sequence search to determine its classification position further in GenBank database.
embodiment 4, endogenetic fungal bacterial strain
pyrenochaetasp.YCEF193 is to the growth-promoting functions of plant
MS substratum (1L): saltpetre 1900mg/L, ammonium nitrate 1650 mg/L, magnesium sulfate 370 mg/L, potassium primary phosphate 170 mg/L, calcium chloride 440 mg/L, manganous sulfate 22.3 mg/L, zinc sulfate 8.6 mg/L, boric acid 6.2 mg/L, potassiumiodide 0.83 mg/L, Sodium orthomolybdate 0.25 mg/L, copper sulfate 0.025 mg/L, cobalt chloride 0.025 mg/L, ferrous sulfate 27.8 mg/L, Na2EDTA37.3 mg/L, glycine 2.0 mg/L, vitamin 0.1 mg/L, pyridoxine hydrochloride 0.5 mg/L, nicotinic acid 0.5 mg/L, inositol 100 mg/L, 30g sucrose, agar powder 8g, H
2o is settled to 1L, pH value 5.8.
(1) select the seed of tobacco bred cloud and mist 87, after sterilized water soaks 48h, rub kind of a 20 ~ 30min with the hands.Seed with 70% alcohol sterilizing 1min, 2%(quality %) clorox sterilizing 10min, put on MS substratum after aseptic water washing 5 ~ 6 times, in 25 DEG C, 16h illumination 80 μm of m-2sec-1 and 22 DEG C, the alternately lower sprouting two weeks (about growing to 4 leaves) of 8h dark, for subsequent use.
(2) Dual culture of tobacco seedling in the same size for same strains tested is selected.The tobacco seedling growing to 4 leaves is transferred to 10*10(centimetre) square 1/2MS substratum on (3 strains/ware), be keep the good growing way of tobacco, removed by the substratum of cauline leaf part, root is unfolded on 1/2MS substratum.Picking cultivates the Endophytic Fungal Hyphae of about a week, is placed in about 1cm below tobacco seedling root and carries out Dual culture.Blank does not connect mycelia, plate sealing be placed on 25 DEG C, 16h illumination 80 μm of m-2sec-1 and 22 DEG C, 8h dark condition under cultivate about two weeks.Remarks illustrate: 1/2 MS substratum is macroelement (saltpetre, ammonium nitrate, magnesium sulfate, potassium primary phosphate, calcium chloride) and reduces by half, the MS substratum that all the other constituent contents are constant.
(3) Dual culture is after two weeks, and strains tested shows good growth-promoting effect (as shown in Figure 2).Taken out from plate by tobacco seedling, blade and root separately, are placed in the centrifuge tube of 1.5ml respectively, dry in baking oven, and precision balance is weighed statistics.
Table 1:YCEF193 and cloud and mist 87 Dual culture rear blade biomass statistics
Table 2:YCEF193 and cloud and mist 87 Dual culture back root part biomass statistics
Compare control group, enforcement group is all obviously better than control group on leaf dry weight and root dry weight, has just tune effect to the growth of tobacco.Dual culture is after two weeks, and strains tested shows good growth result.Again biomass is added up after moving into potted plant 2 months.
Table 3:YCEF193 and cloud and mist 87 move into potted plant rear blade biomass dry weight and add up
Above-mentioned experimental result shows, experimental group
pyrenochaetasp.YCEF193 grows fine, and blade is large and thick, and plant is more strong, and potted plant Leaf dry weight and root dry weight data also show,
pyrenochaetathe tobacco of sp.YCEF193 to this kind of cloud and mist 87 has obvious growth promoting effects effect, or increases the biomass of plant, is called for short growth-promoting functions.
embodiment 5, endogenetic fungal bacterial strain are reducing the effect of tobacco tobacco leaf heavy metal content
Dual culture is after two weeks, and strains tested shows good growth result.Move into potted plant, normal maintenance 2 months, control group CK and experimental group
pyrenochaetathe equal well-grown of sp.YCEF193.In growth normal plant potted plant interior pouring containing Cd(cadmium) heavy metal solution (Cadmium chloride fine powder), heavy metal cadmium content is 5mg/kg, Dual culture after 1 month (as shown in Figure 3) for tobacco leaf Heavy metal.
Adopt the content of heavy metal in IPC-MS Simultaneously test tobacco leaf.
(1) pre-treatment:
Tobacco sample is removed stalk, at depositing 40 DEG C, dry (about 14h), pulverize, cross 40 mesh sieves.Take 0.2000g tobacco powder sample, be placed in tetrafluoroethylene digester, add 2 mL 1 μ g/mL Au standardized solution, 5 mL 65% nitric acid, 1 mL 30% hydrogen peroxide, clear up according to following micro-wave digestion program: after 500 W (5 min) → O w (2 min) → 500 w (5 min) → 8OO w (15min) clears up end, treat that temperature is brought down below 40 DEG C:, take out counteracting tank, Specimen eliminating liquid is transferred in 50 mL polyethylene terephthalate (PET) sample bottles of weighing in advance in stink cupboard, with milli-Q water counteracting tank inner canister and bottle cap 3 times, washings is also transferred in sample bottle, weigh, shake up, obtain solution to be measured.Contrast is not for adding the space management liquid of tobacco leaf.
(2) instrument and solution is measured:
10 ng/mL Mg, Cu, Rh, Cd, In, Ba, the tuning solution of Ce, Pb, U, 10 ng/mL Be, the tuning solution of Mg, In, Co, 10 g/mL Cr, Ni, As, se, cd, cs, Pb mixed standard solution, l0 g/mL Hg standardized solution, 1000 ~ g/mL Au standardized solution (Perkin Elmer company of the U.S.); 1000 g/mL yttrium standardized solution, GBW10016 tealeaves (China National Measuring Science Research Inst.); 30% hydrogen peroxide, concentrated nitric acid (GR, Mer.ck company); Ultrapure water (18.2M ~/em); Tobacco sample (described in embodiment of gathering 1 every potted plant all Mature Tobacco Leaves).
ELAN Dynamic Reaction Cell (DRC) one inductively coupled plasma (ICP) one mass spectrum (MS) instrument (Perkin Elmer company of the U.S.); Rotor16 microwave digestion device (Perkin Elmer company of the U.S.); Ultrapure water instrument (Millipore company of the U.S.); PL601-L electronic analytical balance (0.0001g, Mei Tele company of Switzerland).
Table 4:Cd
2+heavy metal content in tobacco leaf after process 30d
Show do research plant and the mutual of symbiotic microorganism, the tolerance of mutual work to plant absorption heavy metal and heavy metal of root system of plant and symbiotic microorganism has material impact.A lot of plant has mycorrhizal fungi (AM), and mycorrhizal fungi surely grows at plant root the absorbing surface adding root and amasss, and the hypha,hyphae expanding extension in soil helps plant absorption to comprise the nutritive substance of heavy metal.Mycorrhizal fungi kind and host plant genotype to mycorrhizal fungi plant root determine grow and have significant difference to the effect of dietetic alimentation.Result shows, the Metal uptake in soil can be fixed by the outer mycelia of root of mycorrhizal fungi, but the migration of heavy metal from fungi to plant is restricted, or seldom moves to plant shoot.Therefore can symbiotic microorganism limit or reduce the absorption of tobacco heavy metal element, or change the migration of heavy metal from root system of plant to overground part, very crucial for reduction tobacco heavy metal content.Screening finds to cause that the low accumulation of tobacco heavy metal or rhizome ultraproduct are tired out and the symbiotic microorganism of the low accumulation of tobacco leaf shows good application potential in tobacco heavy metal harm reduction.In table 4, there are 6 strain control group tobaccos and 3 strains
pyrenochaetasp.YCEF193 experimental group tobacco, we are by measuring the content of heavy metal element cadmium in blade,
pyrenochaetasp.YCEF193 has obvious effect in the heavy metal content reducing tobacco, and compare control group, in the experimental group of process, the content of heavy metal Cd cadmium have dropped 23.52%.
Finally, it is also to be noted that what enumerate above is only several specific embodiments of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be had.All distortion that those of ordinary skill in the art can directly derive from content disclosed by the invention or associate, all should think protection scope of the present invention.
<110> China Tobacco Industry Zhejiang Co., Ltd.
<120> endogenetic fungal bacterial strain YCEF193 and uses thereof
<160> 2
<210> 1
<211> 531
<212> DNA
<213> Pyrenochaeta sp.
<400> 1
cattaactgt attacggggg gccggcgtgg gattgcgtgc tttggtgcgc cttccctccc 60
cgccctgtct gatactaccc gtgtcttttg cgtaccaatt gtttcctcgg taggcttgcc 120
tgccggccgg acaccataaa accttttgtg attgcagtca gcgtcagaaa actacaataa 180
ttacaacttt caacaacgga tctcttggtt ctggcatcga tgaagaacgc agcgaaatgc 240
gataagtagt gtgaattgca gaattcagtg aatcatcgaa tctttgaacg cacattgcgc 300
cccttggtat tccatggggc atgcctgttc gagcgtcatt tgtaccctca agctctgctt 360
ggtgttgggt gtttgtcccg ctttgcgcgt ggactcgcct caaagcaatt ggcagccggc 420
aatctggtta tagagcgcag cacattttgc gcttcttgcc acggatgtcg gcgtccatca 480
agcctacact tttgctcttg acctcggatc aggtagggat acccgctgaa c 531
Claims (4)
1. endogenetic fungus (
pyrenochaetasp.) bacterial strain YCEF193, is characterized in that: preservation name is called:
pyrenochaetasp.YCEF193, depositary institution: China typical culture collection center, preservation address: Wuhan, China Wuhan University; Preservation date: on November 24th, 2013, deposit number: CCTCC NO:M 2013595.
2. the purposes of endogenetic fungal bacterial strain YCEF193 according to claim 1, is characterized in that: this purposes is for promoting tobacco growing or increasing biomass.
3. the purposes of endogenetic fungal bacterial strain YCEF193 according to claim 1, is characterized in that: this purposes is for reducing heavy metal cadmium content in tobacco.
4. the purposes of endogenetic fungal bacterial strain YCEF193 according to claim 1, is characterized in that: this purposes is for reducing heavy metal cadmium content in tobacco tobacco leaf.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1602356A (en) * | 2001-10-16 | 2005-03-30 | Posco公司 | Transgenic organism expressing fungal MRP-like ABC transporters |
| CN102046778A (en) * | 2008-05-29 | 2011-05-04 | 日本烟草产业株式会社 | Bacterium capable of reducing heavy metal content in plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1602356A (en) * | 2001-10-16 | 2005-03-30 | Posco公司 | Transgenic organism expressing fungal MRP-like ABC transporters |
| CN102046778A (en) * | 2008-05-29 | 2011-05-04 | 日本烟草产业株式会社 | Bacterium capable of reducing heavy metal content in plant |
Non-Patent Citations (1)
| Title |
|---|
| Accumulation of pyrenocines in cultures of the onion pink root pathogen Pyrenochaeta terrestris and some observations on their phytotoxicities.;SALVATORE A.等;《Physiological and Molecular Plant Pathology》;19860531;第28卷(第3期);第381-392页 * |
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