Tillering and small grain 1 dominates the tryptophan aminotransferase family required for local auxin biosynthesis in rice

作     者：Tao Guo Ke Chen Nai-Qian Dong Wang-Wei Ye Jun-Xiang Shan Hong-Xuan Lin Tao Guo;Ke Chen;Nai-Qian Dong;Wang-Wei Ye;Jun-Xiang Shan;Hong-Xuan Lin

作者机构：National Key Laboratory of Plant Molecular GeneticsCAS Centre for Excellence in Molecular Plant Sciences and Collaborative Innovation Center of Genetics&DevelopmentShanghai Institute of Plant Physiology&EcologyShanghai Institute for Biological SciencesChinese Academy of SciencesShanghai 200032China University of the Chinese Academy of SciencesBeijing 100049China School of Life Science and TechnologyShanghaiTech UniversityShanghai 201210China 

出 版 物：《Journal of Integrative Plant Biology》 (植物学报（英文版）)

年 卷 期：2020年第62卷第5期

页      面：581-600页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

基　　金：supported by grants from the Ministry of Science and Technology of China(2016YFD0100902) Chinese Academy of Sciences(QYZDY-SSW-SMC023,XDB27010104) National Natural Science Foundation of China(31788103) China Postdoctoral Science Foundation(2018M642102) the Shanghai Science and Technology Development(18JC1415000) National Key Laboratory of Plant Molecular Genetics 

主　　题：grain local auxin 

摘      要：Auxin is a crucial phytohormone,controlling multiple aspects of plant growth and responses to the changing ***,the role of local auxin biosynthesis in specific developmental programs remains unknown in *** study characterized the rice tillering and small grain 1(tsg1)mutant,which has more tillers but a smaller panicle and grain size resulting from a reduction in endogenous ***1 encodes a tryptophan aminotransferase that is allelic to the FISH BONE(FIB)*** tsg1 mutant showed hypersensitivity to indole-3-acetic acid and the competitive inhibitor of aminotransferase,***1 knockout resulted in an increased tiller number but reduction in grain number and size,and decrease in ***,deletion of the TSG1 homologs OsTAR1,Os TARL1,and OsTARL2 caused no obvious changes,although the phenotype of the TSG1/Os TAR1 double mutant was intensified and infertile,suggesting gene redundancy in the rice tryptophan aminotransferase ***,TSG1 and Os TAR1,but not Os TARL1 and OsTARL2,displayed marked aminotransferase ***,subcellular localization was identified as the endoplasmic reticulum,while phylogenetic analysis revealed functional divergence of TSG1 and OsTAR1 from OsTARL1 and *** findings suggest that TSG1 dominates the tryptophan aminotransferase family,playing a prominent role in local auxin biosynthesis in rice.