The SnRK2-APC/C-TE regulatory module mediates the antagonistic action of gibberellic acid and abscisic acid pathways

文献类型： 外文期刊

第一作者： Lin, Qibing

作者： Lin, Qibing;Wu, Fuqing;Sheng, Peike;Zhang, Zhe;Zhang, Xin;Guo, Xiuping;Wang, Jiulin;Cheng, Zhijun;Wang, Jie;Wang, Haiyang;Wan, Jianmin;Wan, Jianmin

作者机构：

关键词： UBIQUITIN LIGASE;MONOCULM 1;ARABIDOPSIS;DEGRADATION;PROTEIN;RECEPTOR;MECHANISM;INSIGHTS;BINDING;PLANTS

期刊名称：NATURE COMMUNICATIONS （ 影响因子：14.919； 五年影响因子：15.805 ）

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收录情况： SCI

摘要： Abscisic acid (ABA) and gibberellic acid (GA) antagonistically regulate many developmental processes and responses to biotic or abiotic stresses in higher plants. However, the molecular mechanism underlying this antagonism is still poorly understood. Here, we show that loss-of-function mutation in rice Tiller Enhancer (TE), an activator of the APC/C-TE complex, causes hypersensitivity and hyposensitivity to ABA and GA, respectively. We find that TE physically interacts with ABA receptor OsPYL/RCARs and promotes their degradation by the proteasome. Genetic analysis also shows OsPYL/RCARs act downstream of TE in mediating ABA responses. Conversely, ABA inhibits APC/C-TE activity by phosphorylating TE through activating the SNF1-related protein kinases (SnRK2s), which may interrupt the interaction between TE and OsPYL/RCARs and subsequently stabilize OsPYL/RCARs. In contrast, GA can reduce the level of SnRK2s and may promote APC/CTE-mediated degradation of OsPYL/RCARs. Thus, we propose that the SnRK2-APC/C-TE regulatory module represents a regulatory hub underlying the antagonistic action of GA and ABA in plants.

分类号： N

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