The E3 ubiquitin ligase OsRGLG5 targeted by the Magnaporthe oryzae effector AvrPi9 confers basal resistance against rice blast

文献类型： 外文期刊

第一作者： Liu, Zhiquan

作者： Liu, Zhiquan;Qiu, Jiehua;Shen, Zhenan;Wang, Congcong;Jiang, Nan;Shi, Huanbin;Kou, Yanjun

作者机构：

关键词： Oryza sativa; disease resistance; avirulence factor; rice-Magnaporthe oryzae interaction; plant defense

期刊名称：PLANT COMMUNICATIONS （ 影响因子：10.5； 五年影响因子：10.5 ）

ISSN： 2590-3462

年卷期： 2023 年 4 卷 5 期

页码：

收录情况： SCI

摘要： Rice blast, caused by Magnaporthe oryzae, is one of the most devastating diseases of rice. During infection, M. oryzae secretes effectors to facilitate blast development. Among these effectors, the avirulence factor AvrPi9 is recognized by Pi9, a broad-spectrum blast resistance protein that triggers Pi9-mediated resis-tance in rice. However, little is known about the interaction between AvrPi9 and Pi9 and how AvrPi9 exerts virulence to promote infection. In this study, we found that ectopic expression of AvrPi9 in the Pi9-lacking cultivar TP309 suppressed basal resistance against M. oryzae. Furthermore, we identified an AvrPi9-interacting protein in rice, which we named OsRGLG5, encoding a functional RING-type E3 ubiquitin ligase. During infection, AvrPi9 was ubiquitinated and degraded by OsRGLG5. Meanwhile, AvrPi9 affected the sta-bility of OsRGLG5. Infection assays revealed that OsRGLG5 is a positive regulator of basal resistance against M. oryzae, but it is not essential for Pi9-mediated blast resistance in rice. In conclusion, our results revealed that OsRGLG5 is targeted by the M. oryzae effector AvrPi9 and positively regulates basal resistance against rice blast.

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