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LEAFY HEAD2,which encodes a putative RNA-binding protein,regulates shoot development of rice

Cell Research 2006年第3期16卷 267-276页

作者： Guo Sheng Xiong~(1,3) Xing Ming Hu~2 Yong Qing Jiao~1 Yan Chun Yu~1 Cheng Cai Chu~1 Jia Yang Li~1 Qian Qian~2 Yong Hong Wang~11 State Key Laboratory of Plant Genomics and National Center for Plant Gene Research,Institute of Genetics and Developmental Biology,Chinese Academy of Sciences,Beijing 100101,China 2 State Key Laboratory of Rice Biology,China National Rice Research Institute,Chinese Academy of Agricultural Sciences,Hangzhou 310006,China 3 Graduate University of Chinese Academy of Sciences,Beijing 100049,China State Key Laboratory of Plant Genomics and National Center for Plant Gene Research Institute of Genetics and Developmental Biology Chinese Academy of Sciences Beijing China Graduate University of Chinese Academy of Sciences Beijing China State Key Laboratory of Rice Biology China National Rice Research Institute Chinese Academy of Agricultural Sciences Hangzhou China

During vegetative development,higher plants continuously form new leaves in regular spatial and temporal *** with abnormal leaf developmental patterns not only provide a great insight into understanding the regulatorymechanism of plant architecture,but also enrich the ways to its modification by which crop yield could be ***,we reported the characterization of the rice leafy-head2 (lhd2) mutant that exhibits shortened plastochron,dwarfism,reduced tiller number,and failure of phase transition from vegetative to reproductive *** and histologicalstudy revealed that the rapid emergence of leaves in lhd2 was resulted from the rapid initiation ofleafprimordia whereasthe reduced tiller number was a consequence of the suppression of the tiller bud *** molecular and geneticanalysis showed that LHD2 encodes a putative RNA binding protein with 67% similarity to maize *** ofgenome-scale expression profiles between wild-type and lhd2 plants suggested that LHD2 may regulate rice shoot devel-opment through KNOXand hormone-related *** similar phenotypes caused by LHD2 mutation and the conservedexpression pattern of LHD2 indicated a conserved mechanism in controlling the temporal leaf initiation in grass.

关键词： phyllotaxy plastochron LHD2 RNA-binding protein stem elongation plant architecture Oryza sativa L

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