Screening of antagonistic bacteria against Aeromonas veronii in Micropterus salmoides
In order to select the best antagonistic strain against Aeromonas Veronii, a strain of bacteria C2-1 was isolated from the bottom mud of perch ponds in Tai Lake, Jingzhou, and whole genome sequencing, the biological control mechanism was studied. The results showed that the bacterial C2-1 was found to be Bacillus velezensis, with broad-spectrum antibacterial activity. Its antibacterial diameter against various aquatic pathogens such as Shiva′s bacteria and Streptococcus hemolysis ranged from 18.57 to 25.28 mm. The antibacterial substances of strain C2-1 had high acid-base stability and a wide range of temperature adaptation. Electron microscopy revealed that the fermentation products of bacterial C2-1 had a destructive effect on Aeromonas veronii. LC-MS analysis showed that the bacterium contains various lipopeptide active substances, such as imidacloprid. It was found that Bacillus velezensis C2-1 was a potential strain for the control of Aeromonas veronii and had good inhibition effect on Aeromonas veronii.
Aeromonas veroniiBacillus velezensisMicropterus salmoidesbiological control
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