title: Bacillus sp. BS061 Suppresses Gray Mold and Powdery Mildew through the Secretion of Different Bioactive Substances.
abstract: A Bacillus sp. BS061 significantly reduced disease incidence of gray mold and powdery mildew. To identify the active principle, the culture filtrate was partitioned between butanol and water. The antifungal activity against B. cinerea was evident in the butanol-soluble portion, and active substances were identified as cyclic lipopeptides, iturin A series, by nuclear magnetic resonance spectrometry (NMR) and mass analysis. Interestingly, antifungal activity against powdery mildew was observed in the water-soluble portion, suggesting that cyclic lipopeptides have no responsibility to suppress powdery mildew. This finding reveals that biocontrol agents of Bacillus origin suppress gray mold and powdery mildew through the secretion of different bioactive substances.
authors.affiliation: Division of Biotechnology and Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan 570-752, Korea.
authors.forename: Young-Sook
authors.initials: YS
authors.lastname: Kim
authors.forename: Ja-Gyeong
authors.initials: JG
authors.lastname: Song
authors.forename: In-Kyoung
authors.initials: IK
authors.lastname: Lee
authors.forename: Woon-Hyung
authors.initials: WH
authors.lastname: Yeo
authors.forename: Bong-Sik
authors.initials: BS
authors.lastname: Yun
keywords: Bacillus sp. BS061; Biocontrol agent; Gray mold; Lipopeptides; Powdery mildew