Advances in the study of auxin early response genes:Aux/IAA,GH3,and SAUR  

作　　者：Dongfang Bao Senqiu Chang Xiaodong Li Yanhua Qi 

机构地区：[1]Key Laboratory of Herbage&Endemic Crop Biology of Ministry of Education,Inner Mongolia Key Laboratory of Herbage&Endemic Crop Biotechnology,School of Life Sciences,Inner Mongolia University,Hohhot 010000,Inner Mongolia,China

出　　处：《The Crop Journal》2024年第4期964-978,共15页作物学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(32060451 and 32372073);the Natural Science Foundation of Inner Mongolia(2022ZD11);the Science-Technology Plan Project of Inner Mongolia(2023YFDZ0007);Applied Technology Research and Development Foundation of Inner Mongolia(2021PT0001).

摘　　要：Auxin plays a crucial role in all aspects of plant growth and development.Auxin can induce the rapid and efficient expression of some genes,which are named auxin early response genes(AERGs),mainly including the three families:auxin/indole-3-acetic acid(Aux/IAA),Gretchen Hagen 3(GH3),and small auxin-up RNA(SAUR).Aux/IAA encodes the Aux/IAA protein,which is a negative regulator of auxin response.Aux/IAA and auxin response factor(ARF)form a heterodimer and participate in a variety of physiological processes through classical or non-classical auxin signaling pathways.The GH3 encodes auxin amide synthetase,which catalyzes the binding of auxin to acyl-containing small molecule substrates(such as amino acids and jasmonic acid),and regulates plant growth and stresses by regulating auxin homeostasis.SAURs is a class of small auxin up-regulated RNAs.SAUR response to auxin is complex,and the process may occur at the transcriptional,post-transcriptional and protein levels.With the development of multi-omics,significant progress has been made in the study of Aux/IAA,GH3,and SAUR genes,but there are still many unknowns.This review offers insight into the characteristics of Aux/IAA,GH3,and SAUR gene families,and their roles in roots,hypocotyls,leaves,leaf inclinations,flowers,seed development,stress response,and phytohormone crosstalk,and provides clues for future research on phytohormone signaling and the molecular design breeding of crops.

关 键 词：AUXIN AUX/IAA GH3 SAUR STRESS 

分 类 号：S330[农业科学—作物遗传育种]