Characterization of a <i>Bacillus velezensis</i> with Antibacterial Activity and Its Inhibitory Effect on Gray Mold Germ
2023
Lei Li | Rongjie Wang | Xingxing Liang | Yunpeng Gai | Chen Jiao | Meiqin Wang
The present study provides a comprehensive overview of the <i>Bacillus velezensis</i> strain Htq6, and its potential applications in plant disease control. Htq6 is an endophytic bacterium derived from walnut, which was found to possess a strong inhibitory effect on a wide range of plant pathogenic microorganisms and was identified as a good plant disease control agent. The entire genome of the <i>Bacillus velezensis</i> Htq6 was sequenced, and a comparative genomic analysis was conducted with various <i>Bacillus</i> species in order to better understand the mechanism of the strain’s biological control. At the same time, a new classification result was presented. Additionally, transcriptome analysis was performed to explore the response mechanism of tomato gray mold fungus after treatment with the fermentation liquid of <i>Bacillus velezensis</i> Htq6. The study analyzed the distribution of various secondary metabolite gene clusters in the <i>Bacillus</i> model strains and employed RNA-Seq technology to obtain transcriptome expression profiles. Furthermore, the cell wall, cell membrane, and antioxidant-related genes of <i>Botrytis cinerea</i> were analyzed, providing insight into the antibacterial mechanism of biocontrol bacteria and the stress response mechanism of <i>Botrytis cinerea</i>. The results of the research are promising, and could potentially lead to the development of an effective biocontrol agent for the prevention and control of various plant diseases.
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