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Moravian pseudomonas strain X2 and application thereof

A technology of pseudomonas strains and strains, applied in the directions of bacteria, organic fertilizers, microorganisms, etc., can solve the problems of limiting the application scope of indole acetic acid, cumbersome application, etc.

Active Publication Date: 2019-02-15
HENAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the artificial synthesis of indole acetic acid has expanded its source, the spraying method and content need to be strictly controlled, and the application is cumbersome, which limits the application range of indole acetic acid
Although rhizobacteria that symbiotically interact with plants can solve this problem, there are no reports on rhizobacteria that have both phosphorus-solubilizing function and phytohormone production.

Method used

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  • Moravian pseudomonas strain X2 and application thereof
  • Moravian pseudomonas strain X2 and application thereof
  • Moravian pseudomonas strain X2 and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1. Configuration of culture medium

[0052] Prepare the following media:

[0053] (1) PKO liquid medium (inorganic phosphorus bacteria medium)

[0054] Sodium chloride 0.3g, glucose 10g, potassium chloride 0.3g, tricalcium phosphate 5g, ammonium sulfate 0.5g, magnesium sulfate heptahydrate 0.3g, manganese sulfate 0.03g, ferrous sulfate heptahydrate 0.03g, distilled water 1000mL, adjust pH When the value reaches 7.0-7.2, sterilize at 115°C for 30min. Add 15g of agar powder to the culture medium to get PKO solid medium.

[0055] (2) LB liquid medium

[0056] Tryptone 10g, yeast powder 5g, sodium chloride 10g, water 1000mL, adjust the pH value to 7.0, and sterilize at 121°C for 20min. Add 15g of agar powder to the culture medium to get LB solid medium.

[0057] Next, the plant growth-promoting bacteria that can secrete indole acetic acid are screened out through qualitative determination and quantitative determination.

[0058] Table 1 Basic properties of the tested ...

Embodiment 2

[0067] Aerobic test

[0068] Pour the sterilized LB culture medium into 3 sterilized test tubes, at about 2 / 3, on the aseptic operation table, use an inoculation needle to pick up the strain X2 cultured on the slant, and puncture and inoculate it into the above culture medium (must pierce to the bottom of the tube). Cultivate at 30°C, and observe the results in 3 days to 7 days respectively. Those that grow on the surface of the agar column are aerobic bacteria, and those that grow along the puncture line are anaerobic or facultative anaerobic bacteria.

[0069] The test results showed that the colony of bacterial strain X2 grew along the surface of the agar column, and there were also colonies growing in the puncture line, which was facultative anaerobic (see Table 2).

Embodiment 3

[0071] Determination of catalase

[0072] Put 1 drop of 3% HO on a clean slide 2 o 2 Solution, take 1 ring of the slant culture of the strain X2LB cultivated for 18-24 hours, in H 2 o 2 Smear in the middle, if bubbles are produced, it is positive, otherwise it is negative.

[0073] The test results showed that the strain X2 was positive for catalase (see Table 2).

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Abstract

The invention provides a Moravian pseudomonas strain X2 and application thereof, and belongs to the technical field of new application of microorganisms. The strain X2 has phosphorus degradation ability, and the concentration of degraded phosphorus can be up to 401.25 mg / L or more, so that the difficult-to-use phosphorus is converted into available phosphorus so as to increase the content of available phosphorus in the soil, improve the utilization rate of the fertilizers and promote the growth of the plants; and meanwhile, the concentration of heteroauxin generated by the strain X2 is up to 40.42 micron g / mL or more. The application of the Moravian pseudomonas strain X2 in plant cultivation is capable of better improving the yield and quality of the food crop such as wheat and corn, the oil crop such peanut, and the cash crop such as tobacco.

Description

technical field [0001] The invention belongs to the technical field of new uses of microorganisms, and in particular relates to a Pseudomonas Moravian strain X2 and its application. Background technique [0002] Sandy fluvo-aquic soil has strong permeability and good ventilation, and aerobic microbial activities are dominant, which can promote the decomposition of organic matter and accelerate the mineralization of organic matter. And the soil is loose and easy to cultivate. The capillary action of the soil is strong, the water runs fast, and there is a phenomenon of "night tide". The suitable tillage period is also long, and the seedlings are easy to stand; but the nutrient content is low, the fertilizer retention performance is poor, and the crops are prone to defertilization and premature aging in the later stage. At present, most of the soil has been used as arable land, and its utilization rate reaches 92.3%. Targeted improvement measures in the future: plant accordi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C05F11/08C12R1/38
CPCC05F11/08C12N1/205C12R2001/38
Inventor 姜瑛闫亚宇宋晓爽高翯魏义敏王祎汪强刘戈
Owner HENAN AGRICULTURAL UNIVERSITY
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