The versatile plant probiotic bacterium Bacillus velezensis SF305 reduces red root rot disease severity in the rubber tree by degrading the mycelia of Ganoderma pseudoferreum
文献类型： 外文期刊
作者： Tu, Min 1 ; Zhu, Zhongfeng 2 ; Zhao, Xinyang 3 ; Cai, Haibin 1 ; Zhang, Yikun 2 ; Yan, Yichao 2 ; Yin, Ke 2 ; Sha, Zhimin 2 ; Zhou, Yi 3 ; Chen, Gongyou 2 ; Zou, Lifang 2 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Rubber Res Inst, Natl Key Lab Trop Crop Breeding, Sanya 572024, Hainan, Peoples R China
2.Shanghai Jiao Tong Univ, Shanghai Collaborat Innovat Ctr Agriseeds, Sch Agr & Biol, Shanghai 200240, Peoples R China
3.Yangtze Univ, Sch Agr, Jingzhou 434000, Peoples R China
4.Chinese Acad Trop Agr Sci, Sanya Res Inst, Sanya, Peoples R China
5.Shanghai Jiao Tong Univ, State Key Lab Microbial Metab, Shanghai 200240, Peoples R China
关键词： Bacillus velezensis; Ganoderma pseudoferreum; red root rot disease; rubber tree; biocontrol; comparative genomics
期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：4.4； 五年影响因子：4.8 ）
ISSN： 2095-3119
年卷期： 2025 年 24 卷 8 期
页码：
收录情况： SCI
摘要： Natural rubber is an indispensable material of strategic importance that has critical applications in industry and the military. However, the development of the natural rubber industry is impeded by the red root rot disease of rubber trees caused by Ganoderma pseudoferreum, which is one of the most devastating diseases in the rubber tree growing regions in China. To combat this disease, we screened the antifungal activity of 223 candidate bacterial strains against G. pseudoferreum, and found that Bacillus velezensis strain SF305 exhibited significant antifungal activity against G. pseudoferreum. Bacillus velezensis SF305 had a nearly 70% efficacy against the red root rot disease of rubber trees with the therapeutic treatment (Tre), while it exhibited over 90% protection effectiveness with the preventive treatment (Pre). The underlying biocontrol mechanism revealed that B. velezensis SF305 could reduce the disease severity of red root rot by degrading the mycelia of G. pseudoferreum. An antiSMASH analysis revealed that B. velezensis SF305 contains 15 gene clusters related to secondary metabolite synthesis, 13 of which are conserved in species of B. velezensis, but surprisingly, B. velezensis SF305 possesses 2 unique secondary metabolite gene clusters. One is predicted to synthesize locillomycin, and the other is a novel nonribosomal peptides synthetase (NRPS) gene cluster. Genomic analysis showed that B. velezensis SF305 harbors genes involved in motility, chemotaxis, biofilm formation, stress resistance, volatile organic compounds (VOCs) and synthesis of the auxin indole-3-acetic acid (IAA), suggesting its plant growth-promoting rhizobacteria (PGPR) properties. Bacillus velezensis SF305 can promote plant growth and efficiently antagonize some important phytopathogenic fungi and bacteria. This study indicates that B. velezensis SF305 is a versatile plant probiotic bacterium. To the best of our knowledge, this is the first time a B. velezensis strain has been reported as a promising biocontrol agent against the red root rot disease of rubber trees.
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