The potential of Burkholderia gladioli KRS027 in plant growth promotion and biocontrol against Verticillium dahliae revealed by dual transcriptome of pathogen and host

文献类型： 外文期刊

第一作者： Wang, Dan

作者： Wang, Dan;Lin, Haiping;Shan, Yujia;Song, Jian;Zhang, Dan-Dan;Dai, Xiao-Feng;Chen, Jie-Yin;Zhang, Dan-Dan;Dai, Xiao-Feng;Chen, Jie-Yin;Han, Dongfei;Han, Dongfei

作者机构：

关键词： Verticillium dahliae; Biological control; Burkholderia gladioli; Plant growth promotion; Transcriptome

期刊名称：MICROBIOLOGICAL RESEARCH （ 影响因子：6.1； 五年影响因子：6.5 ）

ISSN： 0944-5013

年卷期： 2024 年 287 卷

页码：

收录情况： SCI

摘要： Verticillium dahliae is a destructive, soil-borne pathogen that causes significant losses on numerous important dicots. Recently, beneficial microbes inhabiting the rhizosphere have been exploited and used to control plant diseases. In the present study, Burkholderia gladioli KRS027 demonstrated excellent inhibitory effects against Verticillium wilt in cotton seedlings. Plant growth and development was promoted by affecting the biosynthesis and signaling pathways of brassinosteroids (BRs), gibberellins (GAs), and auxins, consequently promoting stem elongation, shoot apical meristem, and root apical tissue division in cotton. Furthermore, based on the host transcriptional response to V. dahliae infection, it was found that KRS027 modulates the plants to maintain cell homeostasis and respond to other pathogen stress. Moreover, KRS027 induced disruption of V. dahliae cellular structures, as evidenced by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses. Based on the comparative transcriptomic analysis between KRS027 treated and control group of V. dahliae , KRS027 induced substantial alterations in the transcriptome, particularly affecting genes encoding secreted proteins, small cysteine-rich proteins (SCRPs), and protein kinases. In addition, KRS027 suppressed the growth of different clonal lineages of V. dahliae strains through metabolites, and volatile organic compounds (VOCs) released by KRS027 inhibited melanin biosynthesis and microsclerotia development. These findings provide valuable insights into an alternative biocontrol strategy for Verticillium wilt, demonstrating that the antagonistic bacterium KRS027 holds promise as a biocontrol agent for promoting plant growth and managing disease occurrence.

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