Achromobacter aegrifaciens T7 and Bacillus velezensis T107 changed soil bacterial community and alleviated foliar disease caused by Botrytis cinerea on tomatoes

The application of antagonistic microorganisms can effectively reduce the incidence rate of gray mold diseases, and therefore considerable interest has been focused on biological control. Achromobacter aegrifaciens T7 and Bacillus velezensis T107 were isolated from the tomato rhizosphere soil, exhibiting antifungal activity against Botrytis cinerea with inhibition rates of 69.23% and 84.62%, respectively. Both T7 and T107 possessed the ability to produce siderophores, indole-3-acetic acid (IAA), cellulase, and protease.