Bacillus cereus LY05 with efficient Butralin degradation function as well as application and use method of Bacillus cereus LY05

The technology of Bacillus cereus and fenbuterol, which is applied in the field of microorganisms, can solve the problems such as the inability to meet the bioremediation of pesticide residue pollution, and achieve the effects of protecting the ecological environment and human health, good removal effect and convenient use.

Active Publication Date: 2015-10-28
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the diversity of pesticide structures, microbial degradation of pesticides is often highly targeted, resulting in the existing resource pool of degrading bacteria far f...

Method used

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  • Bacillus cereus LY05 with efficient Butralin degradation function as well as application and use method of Bacillus cereus LY05
  • Bacillus cereus LY05 with efficient Butralin degradation function as well as application and use method of Bacillus cereus LY05
  • Bacillus cereus LY05 with efficient Butralin degradation function as well as application and use method of Bacillus cereus LY05

Examples

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Embodiment 1

[0026] Example 1 of the present invention: Isolation and identification of the butyrin-degrading bacteria LY05

[0027] 1) Isolation and screening of butylin-degrading bacteria LY05

[0028] Weigh 10 g of the long-term polluted soil with butylamine into a 250 mL conical flask, add 100 mL of inorganic salt medium, add butylline to a concentration of 100 mg / L, and place the conical flask on a shaker (30 Cultivate at 200 rpm for 7 days, inoculate 5 mL of the culture solution into fresh basal medium (100 mg / L secbutamyl), then culture in a shaker flask at 30°C for 7 days, and so on. The concentration gradient of mg / L increased, so that the concentration of secbutaline in the final enrichment medium reached 1000 mg / L, and the enrichment and degradation strains were obtained.

[0029] During the enrichment and separation of degrading bacteria, after every 2 transfers, the bacterial suspension was prepared into 10 -2 ~10 -6 Serial dilutions were separated on the solid separation a...

Embodiment 2

[0045] Embodiment 2 of the present invention: the preparation of Zhongbuling pesticide residue degradation bacterial agent:

[0046] Adopt the bacterial strain of bacillus cereus LY05 that efficiently degrades butyrin to produce the method for degrading butyrin preparation, comprising the steps:

[0047] 1) Cultivate the strain of Bacillus cereus LY05 in an inorganic salt medium at 30-35°C and 150-200 rpm to the logarithmic growth phase to obtain strains;

[0048] 2) Inoculate the above-mentioned strains into the seed bottle with an inoculum amount of 10% of the volume ratio of the inorganic salt medium, and vibrate at 30-35°C and 150-200 rpm until the logarithmic growth phase to obtain the seed liquid;

[0049] 3) Inoculate the obtained seed liquid into the fermentation medium according to the inoculation amount of 10% by volume, and ferment and cultivate it at 30-35°C and 150-200 rpm for 45-50h to obtain a fermentation liquid, the number of bacteria in the fermentation liqui...

Embodiment 3

[0051] Embodiment 3 of the present invention: Degradation bacteria LY05 is to the degradative performance of butaline:

[0052] Add secbutaline in the inorganic salt medium (same as Example 1) so that the final concentration is 50.0 mg / L; the inoculation concentration is 2.0×10 8 cfu / mL bacterial agent, and set the culture medium without inoculation as the control, culture in the dark at 30°C (200 rpm) for 0-7 days, and take samples regularly. The above-mentioned HPLC method was used to measure the residual amount of butaline and calculate the degradation rate. Degradation rate = (residual amount of control sample - residual amount of treated sample) / residual amount of control sample × 100%. see results figure 2 shown. The results showed that the degrading bacteria LGY06 could effectively degrade Zhongbuling in a short period of time, and the degradation rates of Zhongbuling reached 69.88% within 3 days, 85.84% within 5 days, and 85.84% within 7 days. The degradation rat...

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Abstract

The invention discloses bacillus cereus LY05 with an efficient Butralin degradation function as well as an application and a use method of the bacillus cereus LY05. The strain is preserved in CCTCC (China Center for Type Culture Collection) on Jun. 19, 2015, and the preservation number is CCTCC NO: M2015397. The strain can degrade Butralin pesticide residues efficiently in short time. A bacterial agent obtained from the strain has the advantages of low production cost, convenience in use, good removal effect and the like. With adoption of the bacterial agent, water and soil contaminated by Azoxystrobin and Butralin can be remedied effectively, the problems of excessive pesticide residues and environmental pollution in agricultural production are solved, and the ecological environment and human health are protected.

Description

technical field [0001] The invention relates to the technical field of microorganisms, in particular to a bacillus cereus LY05 capable of efficiently degrading secbutyrin and its application and usage method. Background technique [0002] The chemical name of Butralin is N-sec-butyl-4-tert-butyl-2,6-dinitroaniline, also known as Butralin, and its basic physical and chemical properties are shown in Formula 1. Zhongbuling belongs to dinitroaniline herbicides, which can be absorbed by weed roots or bud sheaths. After the agent enters the plant, it mainly inhibits the cell division of meristems, thereby inhibiting the growth of weed sprouts and young roots. It can be used for Cotton, soybeans, peas, rapeseed, peanuts, potatoes, winter wheat, barley, castor, sunflower, sugar cane, vegetables, fruit trees, etc., mainly used to control monocotyledonous weeds and annual broad-leaved weeds, and can also control small-seeded twins leaf weeds. It can also be used as a plant growth re...

Claims

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Application Information

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IPC IPC(8): C12N1/20A62D3/02B09C1/10C02F3/34C12R1/085A62D101/04A62D101/28C02F101/38
CPCA62D3/02A62D2101/04A62D2101/28B09C1/10C02F3/34C02F2101/38C12N1/205C12R2001/085
Inventor 吴小毛龙友华尹显慧李明李荣玉张承
Owner GUIZHOU UNIV
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