Characterization of Siderophores Produced by Bacillus velezensis YL2021 and Its Application in Controlling Rice Sheath Blight and Rice Blast

文献类型： 外文期刊

第一作者： Liu, Youzhou

作者： Liu, Youzhou;Zuo, Yang;Qiao, Junqing;Yin, Xiaole;Liu, Yongfeng;Dai, Chen;Shen, Jiahui

作者机构：

关键词： bacillibactin; Bacillus velezensis; Magnaporthe oryzae; Rhizoctonia solani; siderophore

期刊名称：PHYTOPATHOLOGY （ 影响因子：3.1； 五年影响因子：3.5 ）

ISSN： 0031-949X

年卷期： 2024 年 114 卷 12 期

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收录情况： SCI

摘要： Bacillus velezensis YL2021 has extensive antimicrobial activities against phytopathogens, and its genome harbors a catechol-type siderophore biosynthesis gene cluster. Here, we describe the characterization of siderophores produced by strain YL2021 and its antimicrobial activity in vitro and in vivo. A few types of siderophores were detected by chrome azurol S plates coupled with Arnow's test, purified, and identified by reversed-phase high-performance liquid chromatography. We found that strain YL2021 can produce different antimicrobial compounds under low-iron M9 medium or iron-sufficient Luria-Bertani medium, although antimicrobial activities can be easily observed on the two media as described above in vitro. Strain YL2021 can produce at least three catechol-type siderophores in low-iron M9 medium, whereas no siderophores were produced in Luria-Bertani medium. Among them, the main antimicrobial siderophore produced by strain YL2021 was bacillibactin, with m/z 882, based on the liquid chromatography-tandem mass spectrometry analysis, which has broad-spectrum antimicrobial activities against gram-positive and gram-negative bacteria, the oomycete Phytophthora capsici, and phytopathogenic fungi. Moreover, the antifungal activity of siderophores, including bacillibactin, observed in vitro was correlated with control efficacies against rice sheath blight disease caused by Rhizoctonia solani and rice blast disease caused by Magnaporthe oryzae in vivo. Collectively, the results demonstrate that siderophores, including bacillibactin, produced by B. velezensis YL2021 are promising biocontrol agents for application in rice disease control.

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