Peanut rhizosphere biocontrol bacterium, and preparation method and application thereof

Abstract

The invention belongs to the biotechnical field, and concretely relates to a peanut rhizosphere biocontrol bacterium, and a preparation method and an application thereof. The peanut rhizosphere biocontrol bacterium is an active strain LX12, the strain LX12 is identified as Brevibacillus laterosporus through 16SrDNA, and the strain is a bacterium screened from peanut rhizosphere soil, antagonistic to fungi, is preserved in China General Microbiological Culture Collection Center, and has a preservation number of CGMCC7420. The strain has an obvious antagonistic effect on pathogens, standoff tests show that the bacterium has a substantial inhibition effect on peanut diseases comprising peanut root rot, southern blight, scab, Phyllosticta glycine and the like, and pot and field tests show that the bacterium has an obvious control effect on the peanut root rot, southern blight, scab, Phyllosticta glycine and the like.

Description

technical field

[0001] The invention belongs to the field of biological technology, and in particular relates to a peanut rhizosphere biocontrol bacterium and its preparation method and application. Background technique

[0002] In the research and application of bio-control bacteria, Bacillus and Pseudomonas are the two most deeply studied bio-control bacteria. Bacillus (Bacillaceae) is a family of bacteria, bacilli or cocci that can form spores (endospores). Including Bacillus, Lactobacillus, Clostridium, Desulfurized Enterobacter and Bacillus sarcina, etc. They are highly resistant to external harmful factors, widely distributed, and exist in soil, water, air, and animal intestines. The spore is a dormant body, and the vast majority is a bacterium that only forms a spore. The spore is located in the bacterium and consists of a core, a cortex, a spore shell and an outer wall. It is a Gram-positive bacterium. The core is the protoplast of the spore, which contains DNA, R...

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