Streptomyces hydrogenans OsiLf-2 capable of effectively antagonizing magnaporthe oryzae in vitro

A technology of endogenous actinomycetes and rice blast bacteria, applied in the direction of bacteria, biocides, microorganisms, etc., to achieve the effects of inhibiting mycelium growth, lasting drug effect, and strong antifungal activity
CN106434409AActive Publication Date: 2017-02-22湖南新长山农业发展股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
湖南新长山农业发展股份有限公司
Publication Date
2017-02-22

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Abstract

The invention discloses streptomyces hydrogenans OsiLf-2 capable of effectively antagonizing magnaporthe oryzae in vitro. The strain is collected in CGMCC (China general microbiological culture collection center), with the collection number of CGMCC No. 11673. Streptomyces hydrogenans OsiLf-2 has a good antagonistic effect on magnaporthe oryzae of at least five different physiological races in vitro. Fermentation broth of streptomyces hydrogenans OsiLf-2 also has a relatively high antagonistic effect on magnaporthe oryzae, and the antibacterial activity is very stable. Streptomyces hydrogenans OsiLf-2 and the fermentation broth have great application potential in biological prevention of rice blast, development of novel, safe, nontoxic and environment-friendly pesticides and the like.
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Description

technical field

[0001] The invention relates to the field of plant endophytic actinomycetes and biological control, in particular to the isolation and resistance-related research of a rice endophytic actinomycete capable of antagonizing rice blast fungus. Background technique

[0002] Rice blast is a fungal disease of rice caused by Magnaporthe oryzae. Magnaporthe grisea is one of the most serious diseases of rice due to its strong viability and wide spread. At present, the control of rice blast mainly includes the selection of disease-resistant varieties and chemical control. However, long-term use of chemical pesticides in large quantities pollutes the environment, damages human health, and causes pathogenic bacteria to develop drug resistance. The genetic background of Magnaporthe grisea is complex and easily mutated, which makes it difficult for rice resistant varieties to keep up with the mutation speed of the physiological race of the pathogenic fungus, and the disea...

Claims

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