Formin protein DRT1 affects gross morphology and chloroplast relocation in rice

文献类型： 外文期刊

第一作者： Zhang, Yanli

作者： Zhang, Yanli;Wu, Limin;Chen, Fei;Xiong, Erhui;Yu, Yanchun;Zhang, Yanli;Ma, Dianrong;Dong, Guojun;Zeng, Dali;Qian, Qian;Wang, Xuewen;Xiong, Guosheng;Zhou, Yihua;Kong, Zhaosheng;Fu, Ying;Yu, Yanchun

作者机构：

期刊名称：PLANT PHYSIOLOGY （ 影响因子：8.005； 五年影响因子：9.115 ）

ISSN： 0032-0889

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收录情况： SCI

摘要： Plant height and tiller number are two major factors determining plant architecture and yield. However, in rice (Oryza sativa), the regulatory mechanism of plant architecture remains to be elucidated. Here, we reported a recessive rice mutant presenting dwarf and reduced tillering phenotypes (drt1). Map-based cloning revealed that the phenotypes are caused by a single point mutation in DRT1, which encodes the Class I formin protein O. sativa formin homolog 13 (OsFH13), binds with F-actin, and promotes actin polymerization for microfilament organization. DRT1 protein localized on the plasma membrane (PM) and chloroplast (CP) outer envelope. DRT1 interacted with rice phototropin 2 (OsPHOT2), and the interaction was interrupted in drt1. Upon blue light stimulus, PM localized DRT1 and OsPHOT2 were translocated onto the CP membrane. Moreover, deficiency of DRT1 reduced OsPHOT2 internalization and OsPHOT2-mediated CP relocation. Our study suggests that rice formin protein DRT1/OsFH13 is necessary for plant morphology and CP relocation by modulating the actin-associated cytoskeleton network. Rice formin protein DRT1 is necessary for plant morphology and chloroplast relocation by modulating the actin-associated cytoskeleton network.

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