IPA1 functions as a downstream transcription factor repressed by D53 in strigolactone signaling in rice

文献类型: 外文期刊

第一作者: Song, Xiaoguang

作者: Song, Xiaoguang;Lu, Zefu;Yu, Hong;Shao, Gaoneng;Xiong, Jinsong;Meng, Xiangbing;Jing, Yanhui;Liu, Guifu;Xiong, Guosheng;Duan, Jingbo;Wang, Yonghong;Li, Jiayang;Song, Xiaoguang;Lu, Zefu;Yu, Hong;Shao, Gaoneng;Xiong, Jinsong;Meng, Xiangbing;Jing, Yanhui;Liu, Guifu;Xiong, Guosheng;Duan, Jingbo;Wang, Yonghong;Li, Jiayang;Shao, Gaoneng;Li, Jiayang;Yao, Xue-Feng;Liu, Chun-Ming;Li, Hongqing;Lu, Zefu;Xiong, Jinsong;Xiong, Guosheng

作者机构:

关键词: tillering;plant architecture;phytohormone;protein interaction;Oryza Sativa L.

期刊名称:CELL RESEARCH ( 影响因子:25.617; 五年影响因子:25.924 )

ISSN: 1001-0602

年卷期: 2017 年 27 卷 9 期

页码:

收录情况: SCI

摘要: Strigolactones (SLs), a group of carotenoid derived terpenoid lactones, are root-to-shoot phytohormones suppressing shoot branching by inhibiting the outgrowth of axillary buds. DWARF 53 (D53), the key repressor of the SL signaling pathway, is speculated to regulate the downstream transcriptional network of the SL response. However, no downstream transcription factor targeted by D53 has yet been reported. Here we report that Ideal Plant Architecture 1 (IPA1), a key regulator of the plant architecture in rice, functions as a direct downstream component of D53 in regulating tiller number and SL-induced gene expression. We showed that D53 interacts with IPA1 in vivo and in vitro and suppresses the transcriptional activation activity of IPA1. We further showed that IPA1 could directly bind to the D53 promoter and plays a critical role in the feedback regulation of SL-induced D53 expression. These findings reveal that IPA1 is likely one of the long-speculated transcription factors that act with D53 to mediate the SL-regulated tiller development in rice.

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