Rice AGL1 determines grain size and sterile lemma identity

作     者：Haiping Yu An Wang Guangheng Zhang Guojun Dong Longbiao Guo Qian Qian Deyong Ren Haiping Yu;An Wang;Guangheng Zhang;Guojun Dong;Longbiao Guo;Qian Qian;Deyong Ren

作者机构：State Key Laboratory of Rice Biology and BreedingChina National Rice Research InstituteHangzhou 310006ZhejiangChina Hainan Yazhou Bay Seed LaboratorySanya 572024HainanChina National Nanfan Research Institute(Sanya)Chinese Academy of Agricultural SciencesSanya 572024HainanChina 

出 版 物：《The Crop Journal》 (作物学报（英文版）)

年 卷 期：2024年第12卷第2期

页      面：630-634页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

基　　金：supported by the National Natural Science Foundation of China(32372118,32188102,32071993) the Qian Qian Academician Workstation,Specific Research Fund of the Innovation Platform for Academicians in Hainan Province(YSPTZX202303) Key Research and Development Program of Zhejiang Province(2021C02056) Hainan Seed Industry Laboratory,China(B21HJ0220) 

主　　题：Abnormal grain and sterile lemma 1 Oryza sativa Grain size Rudimentary glume 

摘      要：The grass spikelet is a unique inflorescence structure that determines grain *** many genetic factors have been well characterized for grain size and glume development,the underlying molecular mechanisms in rice are far from ***,we isolated rice gene,AGL1 that controlled grain size and determines the fate of the sterile *** of function of AGL1 produced larger grains and reduced the size of the sterile *** grains in the agl1 mutant were caused by a larger number of cells that were longer and wider than in the wild *** sterile lemma in the mutant spikelet was converted to a rudimentary glume-like *** findings showed that the AGL1(also named LAX1)protein positively regulated G1 expression,and negatively regulated NSG1 expression,thereby affecting the fate of the sterile *** together,our results revealed that AGL1 played a key role in negative regulation of grain size by controlling cell proliferation and expansion,and supported the opinion that rudimentary glume and sterile lemma in rice are homologous organs.