Characterization of a novel allele of bc12/gdd1 indicates a differential leaf color function for BC12/GDD1 in Indica and Japonica backgrounds

文献类型: 外文期刊

第一作者: Hu, Binhua

作者: Hu, Binhua;Chen, Weilan;Guo, Lianan;Liu, Yulan;Zhang, Guohua;Tu, Bin;Yuan, Hua;Wang, Yuping;Ma, Bingtian;Li, Weitao;Yin, Junjie;Chen, Xuewei;Qin, Peng;Li, Shigui;Hu, Binhua;Pu, Zhigang

作者机构:

关键词: Rice (Oryza sativa L.); Motor kinesin protein; Chl content; Yellowish leaf; Dwarf stature; Map-based cloning

期刊名称:PLANT SCIENCE ( 影响因子:4.729; 五年影响因子:5.132 )

ISSN: 0168-9452

年卷期: 2020 年 298 卷

页码:

收录情况: SCI

摘要: Leaf color is directly associated with plant photosynthesis. Here, we have isolated and identified a spontaneous rice mutant named yd1 that has yellowish leaves and dwarf stature. Map-based cloning reveals that YD1 encodes a previously reported kinesin protein from the kinesin-4 subfamily, BC12/GDD1. Arginine-328 is replaced by leucine in yd1, BC12(328Leu). YD1 is mainly expressed in leaves and is involved in chlorophyll (Chl) synthesis. The yd1 mutant had less Chl and a reduced and disordered thylakoid ultrastructure. In yd1 plants, Chl biosynthesis and photosynthesis associated gene expression was decreased and Chl degradation gene expression was increased, thereby leading to a reduced photosynthesis rate and grain yield. In this study we reveal that the novel BC12(328Leu) allele of BC12 modulated plant leaf color in yd1 plants, which has not been previously reported in studies of BC12/GDD1/MTD1/SRG1. Gene knockout results indicated that YD1 regulates leaf color in the indica rice background, but not in the japonica rice background. Our study provides new insights into molecular regulation of rice growth by BC12/GDD1 in different genetic backgrounds.

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