CN103849589A - High-efficiency degradation strain for quinclorac and applications and using method thereof - Google Patents
High-efficiency degradation strain for quinclorac and applications and using method thereof Download PDFInfo
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- CN103849589A CN103849589A CN201410095008.0A CN201410095008A CN103849589A CN 103849589 A CN103849589 A CN 103849589A CN 201410095008 A CN201410095008 A CN 201410095008A CN 103849589 A CN103849589 A CN 103849589A
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Abstract
The invention belongs to the technical field of environmental protection and particularly relates to a high-efficiency degradation strain for quinclorac and applications thereof. With a code of MC-06, the high-efficiency degradation strain for quinclorac disclosed by the invention is identified to be Escherichiacoli and preserved in China General Microbiological Culture Collection Center on November 19, 2013 with a Preservation No. of CGMCCNo.8487; and the strain can be applied to the treatment of soil and water areas polluted by quinclorac, and has a good degradation effect. The strain has good field-planting capability in soil and water areas polluted by quinclorac, can fully degrade residual quinclorac in soil and water, and does not produce secondary pollution; therefore, the strain has no adverse effect on microorganisms in the original ecological environment.
Description
Technical field
The present invention relates to a strain colon bacillus (Escherichia coli) MC-06, and application in microbiological deterioration quinclorac pesticide residue.
Background technology
Quinclorac is that BASF Aktiengesellschaft starts a kind of hormone-type quinoline acids weedicide of promoting, ISO common name: Quinclorac, molecular formula: C for 1984
06h
5c
l2nO
2, chemical name: 3,7-bis-chloroquine beautiful jade-8-carboxylic acids, its common trade(brand)name has: god hoe (1 generation, 2 generations), quinclorac, kill that barnyard grass spirit, barnyard grass are clean, gram barnyard grass star and barnyard grass king etc.Two chloroquine beautiful jade acid are stable to the ambient conditions such as light, temperature, and in soil, the disappearance of quinclorac and soil humidity are linear.Under the state of nature of field, dichloroquinoline degraded slowly, microorganism in main dependence soil and relevant degraded enzyme, Li Jing newly waits people's research to show that rice field is by under recommend use amount, Acid soil, after 269d, just to tobacco leaf, wide growth has no significant effect, after 342d, just eliminate to the scope having no significant effect that Tobacco Root is grown.Because south is all much rice-cigarette crop rotation field, many rice fields are used quinclorac and are prevented and treated the multiple weeds such as barnyard grass, and and then lower stubble plants again tobacco, and because its transformation period is longer, its residual growth to tobacco in soil brings and has a strong impact on.But for quinclorac soil pollution problem, do not have effectively improvement and solution at present, the material that can only have an adsorption activity by gac etc. adsorbs quinclorac residual in soil; Or in the symptom of being injured that occurs alleviating with some biological regulators such as brassinolide after poisoning cigarette strain; The pollution that these methods all can not fundamentally solve quinclorac is topic, but also easily causes secondary pollution.Seem very urgent and important so seek the efficient improvement method that dichloroquinoline acid pollution is new.
Microbial technology has that removal efficiency is high, processing costs is low, can fundamentally solve quinclorac pollution problem, and can not produce secondary pollution problem.But one of key that adopts microbial technology is the efficient degrading bacterial strain that obtains quinclorac.At present, Chinese scholars has been carried out a large amount of research to quinclorac microbiological deterioration, but because quinclorac contains quinoline ring, stable being difficult for degrades, and content is lower in soil, the degradation bacteria being separated to is up to now also more limited, mainly comprise Ochrobactrum (
ochrobactrum sp.), Burkholderia cepecia, Alcaligenes sp., Bordetella sp., Pantoea sp., Bordetella sp.deng, these bacterial strains that are separated to need further to improve to the quinclorac degradation effect under lower concentration.A large amount of research shows the efficient quinclorac degradation bacteria of separation screening from environment, is the Important Action that fundamentally solves dichloroquinoline acid pollution.And there is not yet the research report about tobacco genus arthrobacter degraded quinclorac at present both at home and abroad.
Summary of the invention
The object of the invention is to provide colon bacillus with quinclorac degradation capability that a plant height is imitated, colonization ability is strong and uses thereof.
The technical solution used in the present invention is:
One strain quinclorac degradation bacteria colon bacillus (Escherichia coli) MC-06, be preserved in China Committee for Culture Collection of Microorganisms's common micro-organisms center, address: China, Beijing, No. 3, No. 1, Beichen Lu, Chaoyang District institute, deposit number: CGMCC No.8487, preservation date: on November 19th, 2013.
Described quinclorac degradation bacteria MC-06 colony characteristics is as follows: on LB substratum, bacterium colony is yellow, circle, and projection, translucent, edge is irregular, smooth surface; The form of observing this thalline under transmission electron microscope is shaft-like; Gram-negative, whole body flagellum, can move, without gemma.
One aspect of the present invention, the application of quinclorac degradation bacteria colon bacillus (Escherichia coli) MC-06 in degraded quinclorac.
One aspect of the present invention, quinclorac degradation bacteria colon bacillus (Escherichia coli) MC-06 is in the application of administering in quinclorac contaminated soil.
One aspect of the present invention, the microbial inoculum that one comprises quinclorac degradation bacteria colon bacillus (Escherichia coli) MC-06, described microbial inoculum can be that any technique means is prepared any type of microbial inoculum known to those skilled in the art,, by carrying out the dry microbial inoculum of freeze-drying acquisition after fermentation culture, can be for example also the concentrated liquid microbial inoculum of liquid form.
One aspect of the present invention, described in comprise the application in quinclorac in degraded of quinclorac degradation bacteria colon bacillus (Escherichia coli) MC-06 microbial inoculum.
One aspect of the present invention, described in comprise quinclorac degradation bacteria colon bacillus (Escherichia coli) MC-06 microbial inoculum in the application of administering in quinclorac contaminated soil.
Described degraded is carried out under 25-35 ℃, pH 6-8.
Preferably, described degraded is carried out under 35 ℃, pH=7.5.
Tobacco Arthrobacter MC-06 in the present invention is a kind of common colon bacillus, through patent searching and other pertinent literatures, not yet find to degrade the colon bacillus bacterial classification of quinclorac, and this bacterial classification can be degraded to quinclorac under lower concentration, and in soil, there is good colonization ability.
Accompanying drawing explanation
Fig. 1 is the transmission electron microscope photo of pseudomonas MC-06 in the present invention.
Fig. 2 is CK measurement result figure.
Fig. 3 is the quinclorac degradation effect figure of pseudomonas MC-06 in the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is described further, but protection scope of the present invention is not limited to this:
Separation, purifying and the preservation of embodiment 1: colon bacillus MC-06.
Described degradation bacteria is cultivated and is screened purifies and separates through domestication and gets, and concrete steps are as follows:
Domestication is cultivated: the rice field soil sample 5g that throughout the year uses quinclorac is joined in the quinclorac minimal medium of 60mg/L to shaking culture 7d on 28 ℃, 150r/min shaking table; Then with 5% inoculum size, be transferred in new quinclorac minimal medium, the concentration of quinclorac is pressed the step increase of 060mg/L, transfers and reaches 500mg/L to dichloroquinoline acid concentration 4 times.
Described minimal medium is: every liter of minimal medium is containing ammonium nitrate 4g, potassium primary phosphate 1.5g, dipotassium hydrogen phosphate 0.5g, iron trichloride 0.01g, calcium chloride 0.01g, micro-mother liquor (EDTA-disodium 0.01g/L, Manganous chloride tetrahydrate 39mg/L, zinc sulfate 43mg/L, key acid sodium 36mg/L) 06mL.
Last domestication nutrient solution is diluted to 06 by concentration gradient
-9, respectively at coated plate on the quinclorac minimal medium of 060mg/L, in 34 ℃ of incubators, to be inverted and to cultivate 3d, the bacterium colony that picking growing way is vigorous expands in LB liquid nutrient medium, purifying is cultivated.
The thalline portion that purifying is obtained is inoculated in LB slant medium, 4 ℃ of preservations; In glycerine, be stored at-20 ℃ simultaneously.
The evaluation of embodiment 2: colon bacillus MC-06.
By 16S rDNA sequential analysis and Physiology and biochemistry experimental identification, determine that bacterial strain MC-06 is tobacco genus arthrobacter bacterial classification.Concrete steps are as follows:
Adopt the DNA of (Beijing full formula gold biotechnology (TransGen Biotech) company limited) extraction of DNA extraction test kit and purifying bacterial strain, 4 ℃ of preservations.Select the 16s universal primer of bacterium to be synthesized by Hua Da genome company:
Upstream primer is 5 '-AGAGTTTGATCMTGGCTCAG-3 ';
Downstream primer is 5 '-TACGGCTACCTTGTTACGACTT-3 '.
Amplification reaction system: 06XBuffer (Mg
2+) 2 μ L, dNTPs2 μ L, the each 1 μ L of primer, thallus DNA 1 μ L, Taq archaeal dna polymerase 0.5 μ L, adds deionized water to 20 μ L.
PCR response procedures is set as: 94 ° of C denaturation 4min; Then 94 ° of C sex change lmin, 55 ° of C annealing lmin, 72 ° of C extend 1.5min, circulate 35 cycles; Then 72 ° of C extend IOmin; Last 4 ° of C keep lOmin.PCR product is checked order (Hua Da genome company).
Sequencing result and Genbank database are compared, and find that it belongs to colon bacillus (Escherichia coli)
.fig. 1 is the electromicroscopic photograph of MC-06 bacterium.
Based on sequencing result and physiological and biochemical test result, determine that MC-06 belongs to colon bacillus (Escherichia coli).Therefore, by this bacterium called after colon bacillus (Escherichia coli) MC-06, be preserved in China Committee for Culture Collection of Microorganisms's common micro-organisms center (abbreviation CGMCC: No. 3, Yard 1, BeiChen xi Road, Chaoyang District, Beijing City, Institute of Microorganism, Academia Sinica, postcode: 100101, preservation date is on November 19th, 2013, and deposit number is CGMCCNo.8487.
The degradation effect of embodiment 3: degradation bacteria MC-06 is identified.
MC-06 bacterium is inoculated in liquid LB in 35 ℃, 180r/min shaking culture to logarithmic phase.By 5ml nutrient solution in the centrifugal 2min of 6000r/min, after abandoning supernatant with being inoculated in 50mg/L quinclorac minimal medium after the resuspended thalline of isopyknic 0.01PBS damping fluid, in 30 ℃, 150r/min, after cultivation 7d, detect the degradation rate of thalline with liquid chromatograph.Degrading experiment is established contrast, three repetitions.
Liquid chromatographic detection condition: chromatographic column: Waters Sun FireTM-C18,5.0 μ m, 4.6 mm × 250 mm.Moving phase: methyl alcohol/0.01% phosphate aqueous solution (3:1, V/V), flow velocity 0.6 mL/min sample size 06 μ L, 30 ℃ of column temperatures, detecting wavelength is 240 nm.
Degradation rate relatively=(content after the degraded of CK content-degradation bacteria)/CK content * 60%
The degradation rate that is calculated quinclorac degradation bacteria MC-06 by above-mentioned formula is 91.36%.
Embodiment 4: the impact of external environment factor on degradation bacteria degradation effect.
The impact of quinclorac starting point concentration on degradation bacteria MC-06 degradation rate: the each 60ml of quinclorac minimal medium sterilizing in triangular flask of preparing respectively 6ppm, 20ppm, 40ppm, 50ppm is stand-by.In above-mentioned quinclorac inorganic salt, inoculate 5% the good MC-06 bacteria suspension of activation respectively, on 30 ℃, the constant-temperature table of 150r/min, cultivate after 7d, measure the degradation efficiency of each processing.
The impact of culture temperature on degradation bacteria MC-06 degradation rate: inoculate the MC-06PBS bacteria suspension that 5% activation is good in the 50ppm quinclorac minimal medium of the bacterium of having gone out, at 20 ℃, 25 ℃, 30 ℃, 35 ℃, 40 ℃, cultivate 7d, measure the degradation rate of each processing.
The impact of medium pH on degradation bacteria MC-06 degradation rate: configure respectively pH=6,6.5,7,7.5,8 50ppm quinclorac minimal medium, the PBS bacteria suspension of the MC-06 of inoculation 5%, on 30 ℃, the constant-temperature table of 150r/min, cultivate 7d, measure the degradation effect of each processing.
The impact of incubation time on degradation bacteria MC-06 degradation effect: inoculate 5% MC-06PBS bacteria suspension in the quinclorac minimal medium of 50ppm, pH=7, on 30 ℃, the constant-temperature table of 150r/min, cultivate 7d, within each 24 hours, get one time sample, measure dichloroquinoline acid content.
Result shows, the best degradation condition of quinclorac degradation bacteria MC-06 is: 35 ° of C, pH value 7.5.Quinclorac initial mass concentration has good degradation effect at 6ppm-50ppm, and degradation rate can reach 90%.While cultivating by the 6th day, degradation bacteria is more abundant to the degraded of dichloroquinoline phosphoric acid.
Embodiment 5: the field planting effect of quinclorac degradation bacteria MC-06 in soil and the repair ability assessment to quinclorac contaminated soil.
Configure the quinclorac pesticide-clay mixture of 25mg/kg in the mode of spraying, degradation bacteria MC-06 is cultured to logarithmic phase, get 5ml bacterium liquid and remove LB after centrifugal, with the resuspended thalline of 20mlPBS damping fluid, be inoculated in the quinclorac pesticide-clay mixture configuring, in 35 ℃ of incubators, cultivate after 7d, measure the content of quinclorac in soil.Test arranges 3 and repeats and contrast.
Quinclorac content assaying method in pedotheque: accurately take 20.0 g pedotheques, be placed in ground triangular flask, add 60 mL methyl alcohol/0.01% phosphate aqueous solutions (3:1, V/V), Clothoid type vibrator extracts after 1 h, extracting solution is transferred in 50 mL centrifuge tubes, centrifugal 5 min of 4000 r/min, filter paper filtering, gets supernatant liquor 30 mL, cross 0.22 μ m filter membrane, for measuring.Condition determination is with embodiment 3.
The degradation effect of degradation bacteria MC-06 7d at 30 ℃ can reach 68.5%.
Although above the present invention is described in detail with a general description of the specific embodiments, on basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, all belong to the scope of protection of present invention.
Claims (9)
1. quinclorac efficient degrading bacteria MC-06, it is characterized in that: Classification And Nomenclature colon bacillus (Escherichia coli), the residual quinclorac in soil and water of can degrading efficiently, culture presevation is numbered: CGMCC No.8487, on November 19th, 2013 is in the center preservation of Chinese culture presevation management committee's common micro-organisms.
2. quinclorac efficient degrading bacteria MC-06 as claimed in claim 1, is characterized in that: described quinclorac efficient degrading bacteria MC-06 colony characteristics is as follows: on LB substratum, bacterium colony is yellow, circle, projection, translucent, edge is irregular, smooth surface; The form of observing this thalline under transmission electron microscope is shaft-like; Gram-negative, whole body flagellum, can move, without gemma.
3. the application of degradation bacteria as claimed in claim 1 in degraded quinclorac.
4. degradation bacteria as claimed in claim 1 is in the application of administering in quinclorac contaminated soil.
5. degradation bacteria MC-06 as described in claim 3 or 4, residual quinclorac in soil or water body is characterized in that also fully degrading under lower concentration, the Degradation of degradation bacteria is carried out under 25-35 ℃, pH 6-8, and best degradation condition is 35 ℃, pH=7.5.
6. a microbial inoculum that comprises degradation bacteria described in claim 1.
7. the application of degradation bacterial agent in degraded quinclorac as claimed in claim 5.
8. the application of degradation bacterial agent in improvement quinclorac contaminated soil as claimed in claim 5.
9. degradation bacterial agent as described in claim 7 or 8, is characterized in that being easy to storage and transport, residual quinclorac in the soil and water of can effectively degrading, and the Degradation of degradation bacterial agent is carried out under 25-35 ℃, pH 6-8.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105861352A (en) * | 2015-01-22 | 2016-08-17 | 北京禾和润生科技有限公司 | Enterobacter ludwigii with quinclorac degradation function and application thereof |
| CN106497816A (en) * | 2015-09-07 | 2017-03-15 | 粮华生物科技（北京）有限公司 | Pseuomonas denitrifican and its microbial inoculum and their applications in degraded dichloro quinolinic acid |
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| CN103243060A (en) * | 2013-05-27 | 2013-08-14 | 湖南农业大学 | Quinclorac degrading bacteria and application thereof |
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| CN103243060A (en) * | 2013-05-27 | 2013-08-14 | 湖南农业大学 | Quinclorac degrading bacteria and application thereof |
Non-Patent Citations (3)
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| "Characterization of a Strain Capable of Degrading a Herbicide Mixture of Quinclorac and Bensulfuronmethyl", 《PEDOSPHERE》 * |
| 范俊等: "1株二氯喹啉酸降解菌QC06的筛选鉴定及其降解特性", 《中国生物防治学报》 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105861352A (en) * | 2015-01-22 | 2016-08-17 | 北京禾和润生科技有限公司 | Enterobacter ludwigii with quinclorac degradation function and application thereof |
| CN106497816A (en) * | 2015-09-07 | 2017-03-15 | 粮华生物科技（北京）有限公司 | Pseuomonas denitrifican and its microbial inoculum and their applications in degraded dichloro quinolinic acid |
| CN106497816B (en) * | 2015-09-07 | 2019-09-03 | 粮华生物科技（北京）有限公司 | Pseuomonas denitrifican and its microbial inoculum and they degradation dichloro quinolinic acid in application |
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Inventor after: Zhang Ying Inventor after: Lin Yi Inventor after: Chen Dexin Inventor after: Zhang Shun Inventor after: Li Bin Inventor after: Cao Junzheng Inventor after: Xu Jialai Inventor after: Huang Guolian Inventor after: Meng He Inventor before: Chen Dexin Inventor before: Zhang Shun Inventor before: Li Bin Inventor before: Cao Junzheng Inventor before: Xu Jialai Inventor before: Huang Guolian Inventor before: Meng He |
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Effective date of registration: 20161017 Address after: 365000, Fujian, Sanming City Province, Chong Gui Village 100 Patentee after: SANMING TOBACCO COMPANY OF FUJIAN PROVINCE TOBACCO COMPANY Patentee after: Tobacco Institute, Chinese Academy of Agricultural Science Address before: 266101 Shandong Province, Qingdao city Laoshan District Four Keyuan Road No. 11 Patentee before: Tobacco Institute, Chinese Academy of Agricultural Science |
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