A kind of Streptomyces niger cys22, its metabolites and application

Abstract

The invention belongs to the field of plant disease biological control, and discloses the preparation and application of Streptomyces melanogenes and its metabolites. The strain number of the Streptomyces niger is CYS22, and the preservation number of the strain in the General Microbiology Center of the China Microorganism Culture Collection Management Committee is CGMCC No. 18476. The Streptomyces niger producing CYS22 of the present invention has inhibitory effects on various plant pathogenic fungi such as Fusarium oxysporum, oryzae oryzae and rot of apple; the strain CYS22 can effectively prevent and treat Fusarium wilt of balsam pear and rice blast; the results of pot experiments show that , The control effect of Streptomyces niger CYS22 fermentation broth on bitter gourd Fusarium wilt was 60.61%. The present invention prepares an active compound P1 from the metabolite of Streptomyces, which can effectively inhibit the spore germination and germ tube growth of M. oryzae.

Description

technical field [0001] The invention belongs to the field of plant disease biological control, in particular to a Streptomyces niger CYS22, its metabolites and applications. Background technique [0002] Plant diseases seriously affect agricultural production. At present, the control of plant diseases in my country mainly relies on chemical agents, but the long-term application of chemical agents will cause problems such as environmental pollution, pesticide residues and drug resistance of pathogens. Therefore, the exploration of new plant disease control technologies with low toxicity, high efficiency, broad spectrum and environmental protection is the focus of current agricultural production. Biological control is a control technology that utilizes the antagonism, competition, parasitism and antibiosis between microorganisms or induces plants to develop disease resistance through microorganisms. It is an effective way for green prevention and control of plant diseases. ...

AI Technical Summary

Problems solved by technology

However, the antagonistic activity of Streptomyces nigerogenes to plant pathogenic bacteria and its control effect on plant diseases have not been reported yet.

[0005] Through the above analysis, the problems and defects in the prior art are: there are many actinomycete strains with plant disease biological control potential that have been reported at present, but large-scale industrial production, and applied to the plant disease control practice of bacterial strains and related There are not many preparations, the main reasons are (1) the biocontrol effect of bacterial strains is greatly affected by environmental conditions, resulting in unstable control effects; (2) the mechanism of action of bacterial strains is complicated, and the application technology is difficult to master; (3) the secondary There are many types of metabolically active substances, and the main active ingredients are unclear or difficult to separate and purify, resulting in high development costs

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