OsRRMh, a Spen‐Like Gene, Plays an Important Role During the Vegetative to Reproductive Transition in Rice

作     者：Derui Liu Xiuling Cai 

作者机构：National Key Laboratory of Plant Molecular Genetics Institute of Plant Physiology and Ecology the Chinese Academy of Sciences University of Chinese Academy of Sciences the Chinese Academy of Sciences 

出 版 物：《Journal of Integrative Plant Biology》 (植物学报（英文版）)

年 卷 期：2013年第55卷第9期

页      面：876-887页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

基　　金：supported by the grants from the Ministry of Agriculture of China(2011ZX08009‐003) 

主　　题：Alternative splicing fertility rate flowering time RNA recognition motifs Spen-like. 

摘      要：OsRRMh, a homologue of OsRRM, encodes a Spen-like protein, and is composed of two N-terminal RNA recognition motifs （RRM） and one C-terminal Spen paralogue and an orthologue C-terminal domain （SPOC）. The gene has been found to be constitutively expressed in the root, stem, leaf, spikelet, and immature seed, and alternative splicing patterns were confirmed in different tissues, which may indicate diverse functions for OsRRMh. The OsRRMh dsRNAi lines exhibited late-flowering and a larger panicle phenotype. When full-length OsRRMh and/or its SPOC domain were overexpressed, the fertility rate and number of spikelets per panicle were both markedly reduced. Also, overexpression of OsRRMh in the Arabidopsis fpa mutant did not restore the normal flowering time, and it delayed flowering in Col plants. Therefore, we propose that OsRRMh may confer one of its functions in the vegetative-to-reproductive transition in rice （Oryza sativa L. subsp. japonica cv. Zhonghua No. 11 （ZH11））.