Kinase activity is required for the receptor kinase DROOPY LEAF1 to control leaf droopiness

文献类型： 外文期刊

第一作者： Wang, Chunfang

作者： Wang, Chunfang;Shang, Zhonglin;Liu, Xigang;Wang, Chunfang;Tang, Sha;Diao, Xianmin;Wang, Chunfang;Zhang, Qi;Zhao, Meicheng

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关键词： kinase activity; plant architecture; BR signaling; phosphorylation; foxtail millet

期刊名称：PLANT SIGNALING & BEHAVIOR （ 影响因子：2.247； 五年影响因子：2.369 ）

ISSN： 1559-2316

年卷期： 2021 年 16 卷 11 期

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收录情况： SCI

摘要： Plants have evolved many leucine-rich repeat receptor-like kinases (LRR-RLKs) that control all aspects of plant life in a kinase-dependent or -independent manner. DROOPY LEAF1 (DPY1), which is a subfamily II LRR-RLK authentic kinase, controls leaf droopiness by negatively regulating early brassinosteroid (BR) signaling in foxtail millet. In this study, we proved that overexpressing kinase-inactive DPY1 does not rescue the droopy leaf phenotype of dpy1 plants because the mutated DPY1 cannot repress BR signaling, suggesting that kinase activity is required for DPY1 to control BR signaling. Moreover, seven DPY1 sites potentially transphosphorylated by SiBAK1 were identified as crucial for DPY1 activation. These findings highlight the importance of kinase activity for the functionality of DPY1.

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