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J Fungi (Basel)

Title:		Identification of Bacillus velezensis SBB and Its Antifungal Effects against Verticillium dahliae
Author(s):		Wang WY; Kong WL; Liao YC; Zhu LH;
Address:		"College of Forestry, Nanjing Forestry University, Nanjing 210037, China. College of Plant Protection, China Agricultural University, Beijing 100193, China. Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing 210037, China"
Journal Title:		J Fungi (Basel)
Year:		2022
Volume:		20220928
Issue:		10
Page Number:		-
DOI:		10.3390/jof8101021
ISSN/ISBN:		2309-608X (Electronic) 2309-608X (Linking)
Abstract:		"Traditional control methods have drawbacks in controlling Verticillium wilt diseases caused by Verticillium dahliae Kleb.; therefore, an efficient and environmentally friendly strategy for disease control must be identified and the mechanisms determined. In this study, a soil-isolated strain SBB was identified as Bacillus velezensis based on 16S rRNA, gyrA, and gyrB gene sequences. In vitro, strain SBB had excellent inhibitory effects on V. dahliae, with the highest inhibition rate of 70.94%. Moreover, strain SBB inhibited production of the conidia of V. dahliae and suppressed the production of microsclerotia and melanin. Through gas chromatograph-mass spectrometer analysis, nine compounds were detected from the volatile organic compounds produced by SBB, among which 2-nonanol, 2-heptanone, 6-methyl-2-heptanone, and 2-nonanone could completely inhibit V. dahliae growth. Strain SBB produced cellulase, amylase, protease, and siderophore. During inhibitory action on V. dahliae, strain SBB showed upregulated expression of genes encoding non-volatile inhibitory metabolites, including difficidin, bacilysin, and bacillaene, at 1.923-, 1.848-, and 1.448-fold higher, respectively. Thus, our study proved that strain SBB had an efficient antagonistic effect on V. dahliae, suggesting strain SBB can be used as a potential biological control agent against Verticillium wilt"
Keywords:		Bacillus velezensis Verticillium dahliae antagonistic effect biological control;
Notes:		"PubMed-not-MEDLINEWang, Wei-Yu Kong, Wei-Liang Liao, Yang-Chun-Zi Zhu, Li-Hua eng No. 31971659/National Natural Science Foundation of China/ Switzerland 2022/10/28 J Fungi (Basel). 2022 Sep 28; 8(10):1021. doi: 10.3390/jof8101021"