Abstract
Bacillus species are promising agents for the biological control of postharvest diseases. Based on the morphological, physiological and biochemical characteristics and 16S rRNA gene sequence analysis, the bacterial strain J-1 was identified as Bacillus atrophaeus. The B. atrophaeus strain J-1 showed broad spectrum antifungal activity against various plant pathogenic fungi. In assays in vitro the metabolites contained in the B. atrophaeus strain J-1 cell-free filtrate had a strong inhibitory effect on Botryosphaeria dothidea. The cell-free filtrate inhibited the growth of B. dothidea in vivo and reduced the disease incidence. Furthermore, PCR detection showed that the strain J-1 had lipopeptide antibiotic biosynthesis genes: fengycin, iturin A and surfactin. The lipopeptide crude extractions from the strain J-1 cell-free filtrate significantly suppressed the growth of B. dothidea. C14 iturin A was isolated by bioactivity-guided fractionation and identified by liquid chromatography–electronic spray ionization–tandem mass spectrometry analysis. This paper is the first to report that B. atrophaeus J-1 efficiently controls apple ring rot disease caused by B. dothidea. Using the B. atrophaeus strain J-1 may provide an alternative control method for the prevention apple ring rot disease.
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This study was supported by the National Key Research and Development Program of China (2017YFD0200503).
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Mu, Y., Yue, Y., Gu, G. et al. Identification and characterization of the Bacillus atrophaeus strain J-1 as biological agent of apple ring rot disease. J Plant Dis Prot 127, 367–378 (2020). https://doi.org/10.1007/s41348-020-00309-x
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DOI: https://doi.org/10.1007/s41348-020-00309-x