Suppression of auxin signalling promotes rice susceptibility to Rice black streaked dwarf virus infection

文献类型： 外文期刊

第一作者： Zhang, Hehong

作者： Zhang, Hehong;Tan, Xiaoxiang;Li, Lulu;Li, Junmin;Lin, Lin;Cheng, Ye;Yan, Fei;Chen, Jianping;Sun, Zongtao;He, Yuqing;Hong, Gaojie;Li, Junmin;Lin, Lin;Cheng, Ye;Yan, Fei;Chen, Jianping;Sun, Zongtao

作者机构：

关键词： auxin signalling; jasmonic acid; OsRboh; reactive oxygen species; rice black streaked dwarf virus

期刊名称：MOLECULAR PLANT PATHOLOGY （ 影响因子：5.663； 五年影响因子：5.626 ）

ISSN： 1464-6722

年卷期： 2019 年 20 卷 8 期

页码：

收录情况： SCI

摘要： Auxin plays a fundamental role in plant growth and development, and also influences plant defence against various pathogens. Previous studies have examined the different roles of the auxin pathway during infection by biotrophic bacteria and necrotrophic fungi. We now show that the auxin signalling pathway was markedly down-regulated following infection of rice by Rice black streaked dwarf virus (RBSDV), a dsRNA virus. Repression of the auxin receptor TIR1 by a mutant overexpressing miR393 increased rice susceptibility to RBSDV. Mutants overexpressing the auxin signalling repressors OsIAA20 and OsIAA31 were also more susceptible to RBSDV. The induction of jasmonic acid (JA) pathway genes in response to RBSDV was supressed in auxin signalling mutants, suggesting that activation of the JA pathway may be part of the auxin signalling-mediated rice defence against RBSDV. More importantly, our results also revealed that OsRboh-mediated reactive oxygen species levels played important roles in this defence. The results offer novel insights into the regulatory mechanisms of auxin signalling in the rice-RBSDV interaction.

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