A New Biocontrol Agent Bacillus velezensis SF334 against Rubber Tree Fungal Leaf Anthracnose and Its Genome Analysis of Versatile Plant Probiotic Traits

文献类型： 外文期刊

第一作者： Wang, Muyuan

作者： Wang, Muyuan;Zhang, Yikun;Zhu, Zhongfeng;Yan, Yichao;Yin, Ke;Cheng, Guanyun;Li, Yinsheng;Chen, Gongyou;Zou, Lifang;Cai, Haibin;Tu, Min;Zhao, Xinyang;Chen, Gongyou;Zou, Lifang;Tu, Min

作者机构： Shanghai Jiao Tong Univ, Shanghai Collaborat Innovat Ctr Agriseeds, Sch Agr & Biol, Shanghai 200240, Peoples R China;Chinese Acad Trop Agr Sci, Rubber Res Inst, Natl Key Lab Trop Crop Breeding, Sanya 572024, Peoples R China;Yangtze Univ, Sch Agr, Jingzhou 434000, Peoples R China;Shanghai Jiao Tong Univ, State Key Lab Microbial Metab, Shanghai 200240, Peoples R China;Chinese Acad Trop Agr Sci, Sanya Res Inst, Sanya 572020, Peoples R China

关键词： Bacillus velezensis; anthracnose; rubber tree; Colletotrichum siamense; Colletotrichum australisinense

期刊名称：JOURNAL OF FUNGI （ 2022影响因子：4.7； 五年影响因子：5.2 ）

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年卷期： 2024 年 10 卷 2 期

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收录情况： SCI

摘要： Natural rubber is an important national strategic and industrial raw material. The leaf anthracnose of rubber trees caused by the Colletotrichum species is one of the important factors restricting the yields of natural rubber. In this study, we isolated and identified strain Bacillus velezensis SF334, which exhibited significant antagonistic activity against both C. australisinense and C. siamense, the dominant species of Colletotrichum causing rubber tree leaf anthracnose in the Hainan province of China, from a pool of 223 bacterial strains. The cell suspensions of SF334 had a significant prevention effect for the leaf anthracnose of rubber trees, with an efficacy of 79.67% against C. siamense and 71.8% against C. australisinense. We demonstrated that SF334 can lead to the lysis of C. australisinense and C. siamense mycelia by causing mycelial expansion, resulting in mycelial rupture and subsequent death. B. velezensis SF334 also harbors some plant probiotic traits, such as secreting siderophore, protease, cellulase, pectinase, and the auxin of indole-3-acetic acid (IAA), and it has broad-spectrum antifungal activity against some important plant pathogenic fungi. The genome combined with comparative genomic analyses indicated that SF334 possesses most genes of the central metabolic and gene clusters of secondary metabolites in B. velezensis strains. To our knowledge, this is the first time a Bacillus velezensis strain has been reported as a promising biocontrol agent against the leaf anthracnose of rubber trees caused by C. siamense and C. australisinense. The results suggest that B. velezensis could be a potential candidate agent for the leaf anthracnose of rubber trees.

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