A kind of bacillus that antagonizes mold and its antibacterial application

Abstract

The invention discloses a bacillus antagonizing mold and its antibacterial application, belonging to the technical field of microorganism prevention and control. The mold-antagonizing bacillus provided by the invention is a bacillus strain with broad-spectrum antibacterial ability. It was preserved in the China Center for Type Culture Collection, and sequence comparison analysis found that the strain was 100% related to the known Bacillus amyloliquefaciens Holycan 1 (Bacillus amyloliquefaciens Holycan 1, KM54172), and it was determined that it belonged to Bacillus amyloliquefaciens (Bacillus amyloliquefaciens). The mold-antagonistic bacillus provided by the invention has a very short time to reach the stable period, which is conducive to its rapid colonization and occupation of ecological niches, and competition with other molds for nutrients and living space. Therefore, the Penicillium provided by the invention antagonizes Bacillus amyloliquefaciens, has a good inhibitory effect on common crop disease fungi, shows a broad antibacterial spectrum, has a large biocontrol potential, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of microorganism prevention and control, and relates to a bacillus, in particular to an antagonizing mold bacillus and its antibacterial application. Background technique [0002] Mold is ubiquitous and highly resistant to stress due to the formation of spores. Since mold is a chemoheterotrophic fungus, it can borrow organic matter to live. Therefore, wherever there is organic matter, if the temperature and humidity are appropriate, it may cause mold pollution or infection, which will bring a lot of trouble to human society. For example, in the storage of fruits, vegetables, grain and feed, it is easy to be polluted by mold, causing economic losses and even poisoning of humans and animals; Affect the growth of plants, resulting in reduced production and so on. The prevention and treatment of mold pollution is a protracted battle that we have had for a long time and may continue for a long time. [0003] B...

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Problems solved by technology

[0007] Plant fungal disease is an important problem that causes agricultural production and food safety. The invasion of pathogenic microorganisms will cause slow growth and stagnation of plants, affect the appearance and quality of fruits, and even cause devastating crop death, grain failure, and huge economic losses ( Xie Jing. Screening, identification and research on the mechanism of antagonistic microorganisms against plant pathogenic bacteria [D]: Sichuan University, 2004)

For a long time, the prevention and control of plant diseases has mainly relied on the use of chemical pesticides and fertilizers. Although the effect is remarkable, it has caused soil and groundwater pollution, which is a more serious ecological problem.

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