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Molecules 2019, 24(6), 1046; https://doi.org/10.3390/molecules24061046

Bacillus velezensis: A Valuable Member of Bioactive Molecules within Plant Microbiomes

1
Department of Biotechnology, Yeungnam University, Gyeongsan 38541, Gyeongbuk, Korea
2
Nakdonggang National Institute of Biological Resources, Sangju 37242, Gyeongbuk, Korea
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Received: 19 February 2019 / Revised: 8 March 2019 / Accepted: 12 March 2019 / Published: 16 March 2019
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Abstract

Bacillus velezensis is an aerobic, gram-positive, endospore-forming bacterium that promotes plant growth. Numerous strains of this species have been reported to suppress the growth of microbial pathogens, including bacteria, fungi, and nematodes. Based on recent phylogenetic analysis, several Bacillus species have been reclassified as B. velezensis. However, this information has yet to be integrated into a well-organized resource. Genomic analysis has revealed that B. velezensis possesses strain-specific clusters of genes related to the biosynthesis of secondary metabolites, which play significant roles in both pathogen suppression and plant growth promotion. More specifically, B. velezensis exhibits a high genetic capacity for synthesizing cyclic lipopeptides (i.e., surfactin, bacillomycin-D, fengycin, and bacillibactin) and polyketides (i.e., macrolactin, bacillaene, and difficidin). Secondary metabolites produced by B. velezensis can also trigger induced systemic resistance in plants, a process by which plants defend themselves against recurrent attacks by virulent microorganisms. This is the first study to integrate previously published information about the Bacillus species, newly reclassified as B. velezensis, and their beneficial metabolites (i.e., siderophore, bacteriocins, and volatile organic compounds). View Full-Text
Keywords: Bacillus velezensis; bioactive compound; volatile organic compound; induced systemic resistance Bacillus velezensis; bioactive compound; volatile organic compound; induced systemic resistance
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Rabbee, M.F.; Ali, M.S.; Choi, J.; Hwang, B.S.; Jeong, S.C.; Baek, K.-H. Bacillus velezensis: A Valuable Member of Bioactive Molecules within Plant Microbiomes. Molecules 2019, 24, 1046.

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