GbMPK3 overexpression increases cotton sensitivity to Verticillium dahliae by regulating salicylic acid signaling

文献类型： 外文期刊

第一作者： Long, Lu

作者： Long, Lu;Xu, Fu-Chun;Zhao, Jing-Ruo;Li, Bing;Gao, Wei;Long, Lu;Gao, Wei;Xu, Li

作者机构：

关键词： WRKY70; PR gene; Salicylic acid; Jasmonic acid; Virus-induced gene silencing

期刊名称：PLANT SCIENCE （ 影响因子：4.729； 五年影响因子：5.132 ）

ISSN： 0168-9452

年卷期： 2020 年 292 卷

页码：

收录情况： SCI

摘要： The soil-born vascular disease Verticillium wilt, which is caused by fungal pathogen Verticillium dahliae, is a devastating disease of cotton worldwide. In the last decade, a large number of genes have been found to participate in cotton-V. dahliae interactions, but the detailed mechanisms of cotton resistance to V. dahliae remain unclear. Here, we functionally characterized MPK3, a MAPK gene from cotton. MPK3 was induced in the roots of both resistant and susceptible cotton cultivars by V. dahliae inoculation. Transgenic cotton and tobacco with constitutively higher GbMPK3 expression conferred higher V. dahliae susceptibility, while MPK3 knockdown in cotton has limited effect on cotton resistance to V. dahliae. Expression profiling revealed that SA-mediated defense pathway genes (WRKY70, PR1, and PR5) accumulated after V. dahliae inoculation in roots of both wild-type and transgenic cotton, and the expression levels of these genes were higher in GbMPK3-overexpressing plants than in wild-type plants, indicating that GbMPK3 upregulation may reduce plant resistance to V. dahliae through regulating salicylic acid signaling transduction.

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