The chloroplast-localized protein LTA1 regulates tiller angle and yield of rice  

作　　者：Xiaowu Pan Yongchao Li Haiwen Zhang Wenqiang Liu Zheng Dong Licheng Liu Sanxiong Liu Xinnian Sheng Jun Min Rongfeng Huang Xiaoxiang Li 

机构地区：[1]Rice Research Institute,Hunan Academy of Agricultural Sciences,Changsha 410125,Hunan,China [2]Biotechnology Research Institute,Chinese Academy of Agricultural Sciences,Beijing 100081,China

出　　处：《The Crop Journal》2022年第4期952-961,共10页作物学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(31801335);Training Program for Excellent Young Innovators of Changsha(kq1802034);Department of Science and Technology in Hunan Province(2019RS2047).

摘　　要：Plant architecture strongly influences rice grain yield.We report the cloning and characterization of the LTA1 gene,which simultaneously controls tiller angle and yield of rice.LTA1 encodes a chloroplastlocalized protein with a conserved YbaB DNA-binding domain,and is highly expressed in photosynthetic tissues including leaves and leaf sheaths.Disrupting the function of LTA1 leads to large tiller angle and yield reduction of rice.LTA1 affects the gravity response by mediating the distribution of endogenous auxin,thereby regulating the tiller angle.An lta1 mutant showed abnormal chloroplast development and decreased chlorophyll content and photosynthetic rate,in turn leading to reduction of rice yield.Our findings shed light on the genetic basis of tiller angle and provide a potential gene resource for the improvement of plant architecture and rice yield.

关 键 词：RICE YIELD Tiller angle GRAVITROPISM Chloroplast development 

分 类 号：S511[农业科学—作物学]