Control of tillering in rice

Xueyong Li, Qian Qian, Zhiming Fu, Yonghong Wang, Guosheng Xiong, Dali Zeng, Xiaoqun Wang, Xinfang Liu, Sheng Teng, Fujimoto Hiroshi, Ming Yuan, Da Luo, Bin Han and Jiayang Li ()
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Xueyong Li: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Qian Qian: China National Rice Research Institute, Chinese Academy of Agricultural Sciences
Zhiming Fu: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Yonghong Wang: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Guosheng Xiong: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Dali Zeng: China National Rice Research Institute, Chinese Academy of Agricultural Sciences
Xiaoqun Wang: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Xinfang Liu: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Sheng Teng: China National Rice Research Institute, Chinese Academy of Agricultural Sciences
Fujimoto Hiroshi: China National Rice Research Institute, Chinese Academy of Agricultural Sciences
Ming Yuan: China Agricultural University
Da Luo: Institute of Plant Physiology and Ecology, Chinese Academy of Sciences
Bin Han: National Center for Gene Research, Chinese Academy of Sciences
Jiayang Li: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences

Nature, 2003, vol. 422, issue 6932, 618-621

Abstract: Abstract Tillering in rice (Oryza sativa L.) is an important agronomic trait for grain production, and also a model system for the study of branching in monocotyledonous plants. Rice tiller is a specialized grain-bearing branch that is formed on the unelongated basal internode and grows independently of the mother stem (culm) by means of its own adventitious roots1. Rice tillering occurs in a two-stage process: the formation of an axillary bud at each leaf axil and its subsequent outgrowth2. Although the morphology and histology2,3 and some mutants of rice tillering4 have been well described, the molecular mechanism of rice tillering remains to be elucidated. Here we report the isolation and characterization of MONOCULM 1 (MOC1), a gene that is important in the control of rice tillering. The moc1 mutant plants have only a main culm without any tillers owing to a defect in the formation of tiller buds. MOC1 encodes a putative GRAS family nuclear protein that is expressed mainly in the axillary buds and functions to initiate axillary buds and to promote their outgrowth.

Date: 2003
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DOI: 10.1038/nature01518

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