Effects of XJ-BV2007 on Growth of and Production of Tenuazonic Acid.

Large amounts of processing tomato are grown in Xinjiang, China. Tomato black spot disease, caused by spp., and the produced alternaria toxins in tomato products are posing risks to human health. In this study, we isolated a rhizospheric bacterium, XJ-BV2007, from tomato () fields, which we identified as . We found that this bacterium has a strong antagonistic effect against and reduces the accumulation of alternaria toxins in tomatoes. According to the antifungal activity of the bacteria-free filtrate, we revealed that XJ-BV2007 suppresses by the production of antifungal metabolites. Combining semi-preparative high-performance liquid chromatography, we employed UPLC-QTOF-MS analysis and the Oxford cup experiment to find that fengycin plays an important role in inhibiting . This paper firstly reported that efficiently controls tomato black spot disease and mycotoxins caused by . XJ-BV2007 may provide an alternative biocontrol strain for the prevention of tomato black spot disease.