Transcriptional activation and phosphorylation of OsCNGC9 confer enhanced chilling tolerance in rice

文献类型： 外文期刊

第一作者： Wang, Jiachang

作者： Wang, Jiachang;Liu, Xi;Zhang, Xiao;Wan, Hua;Zhang, Yu;Zhou, Chunlei;Pan, Tian;Wang, Yongfei;Wu, Mingming;Jing, Ruonan;Xu, Yang;Wang, Yihua;Zhao, Zhigang;Jiang, Ling;Wan, Jianmin;Wang, Jiachang;Ren, Yulong;Luo, Sheng;Liu, Xin;Lin, Qibing;Zhu, Shanshan;Lei, Bin;Wu, Fuqing;Lei, Cailin;Guo, Xiuping;Cheng, Zhijun;Zheng, Xiaoming;Zhang, Xin;Wang, Haiyang;Wan, Jianmin;Yang, Yang;Wang, Yong-Fei;Han, Meng

作者机构：

关键词： OsCNGC9; OsSAPK8; OsDREB1A; cold signaling transduction; chilling tolerance

期刊名称：MOLECULAR PLANT （ 影响因子：13.164； 五年影响因子：16.357 ）

ISSN： 1674-2052

年卷期： 2021 年 14 卷 2 期

页码：

收录情况： SCI

摘要： Low temperature is a major environmental factor that limits plant growth and productivity. Although transient elevation of cytoplasmic calcium has long been recognized as a critical signal for plant cold tolerance, the calcium channels responsible for this process have remained largely elusive. Here we report that OsCNGC9, a cyclic nucleotide-gated channel, positively regulates chilling tolerance by mediating cytoplasmic calcium elevation in rice (Oryza sativa). We showed that the loss-of-function mutant of OsCNGC9 is defective in cold-induced calcium influx and more sensitive to prolonged cold treatment, whereas OsCNGC9 overexpression confers enhanced cold tolerance. Mechanistically, we demonstrated that in response to chilling stress, OsSAPK8, a homolog of Arabidopsis thaliana OST1, phosphorylates and activates OsCNGC9 to trigger Ca2+ influx. Moreover, we found that the transcription of OsCNGC9 is activated by a rice dehydration-responsive element-binding transcription factor, OsDREB1A. Taken together, our results suggest that OsCNGC9 enhances chilling tolerance in rice through regulating cold-induced calcium influx and cytoplasmic calcium elevation.

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