Rice APC/C-TE controls tillering by mediating the degradation of MONOCULM 1

文献类型： 外文期刊

第一作者： Lin, Qibing

作者： Lin, Qibing;Wang, Dan;Gu, Suhai;Cheng, Zhijun;Qin, Ruizhen;Wang, Jiu Lin;Wu, Fuqing;Guo, Xiuping;Zhang, Xin;Lei, Cailin;Wang, Haiyang;Wan, Jianmin;Dong, Hui;Gong, Jie;Jiang, Ling;Wan, Jianmin;Li, Gang

作者机构：

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

ISSN： 2041-1723

年卷期： 2012 年 3 卷

页码：

收录情况： SCI

摘要： Rice MONOCULM 1 (MOC1) and its orthologues LS/LAS (lateral suppressor in tomato and Arabidopsis) are key promoting factors of shoot branching and tillering in higher plants. However, the molecular mechanisms regulating MOC1/LS/LAS have remained elusive. Here we show that the rice tiller enhancer (te) mutant displays a drastically increased tiller number. We demonstrate that TE encodes a rice homologue of Cdh1, and that TE acts as an activator of the anaphase promoting complex/cyclosome (APC/C) complex. We show that TE coexpresses with MOC1 in the axil of leaves, where the APC/C-TE complex mediates the degradation of MOC1 by the ubiquitin-26S proteasome pathway, and consequently downregulates the expression of the meristem identity gene Oryza sativa homeobox 1, thus repressing axillary meristem initiation and formation. We conclude that besides having a conserved role in regulating cell cycle, APC/C-TE has a unique function in regulating the plant-specific postembryonic shoot branching and tillering, which are major determinants of plant architecture and grain yield.

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