生物技术通报2023，Vol.39Issue(12)：16-32,17.DOI:10.13560/j.cnki.biotech.bull.1985.2023-0793
质膜Na+/H+逆向转运蛋白SOS1在植物离子稳态平衡中的作用
Roles of Plasma Membrane Na+/H+ Antiporter SOS1 in Maintaining Ionic Homeostasis of Plants
摘要
Abstract
Plants regulate ion homeostasis to adapt to saline environment through a series of complex transport systems.SOS(salt over sensitive)signal pathway is the major signal pathway for plants to respond to abiotic stress,which is mainly composed of plasma membrane Na+/H+ antiporter SOS1,serine/threonine protein kinase SOS2,and calcium sensor SOS3.As one of the main members of SOS signaling pathway,SOS1 widely exists in higher plants.Due to the early evolutionary differences,the structural,physical,and chemical properties of SOS1 from different species had certain specificity.The SOS1 protein is a homodimer,and each monomer is composed of transmembrane and intracellular domains,which provides a stable docking platform for integrating signals from different pathways and regulating Na+ transport.Transcription level of the SOS1 gene was regulated by different stress conditions.SOS1 activity was inhibited or activated through Ca2+ signal regulation,phosphorylation,self-inhibition,and synergistic regulation with other ion transporters.SOS1 has shown to regulate circadian rhythm and pH,and maintain ion homeostasis in plants,which plays an important role in the response of plant to abiotic stress.In this review,the structure,function,regulation mechanism of SOS1 and its role in maintaining plant ion homeostasis are reviewed,and its future research direction is also prospected.The information in this review provide a theoretical support and excellent genetic resources for the genetic improvement of crops to produce new,stress-resistant varieties.关键词
SOS1/Na+外排/Na+长距离运输/离子稳态/SOS信号通路/耐盐性/氧化应激Key words
SOS1/Na+ extrusion/Na+ long-distance transport/ion homeostasis/SOS signaling pathway/salt tolerance/oxidative stress引用本文复制引用
朱业胜,伍国强,魏明..质膜Na+/H+逆向转运蛋白SOS1在植物离子稳态平衡中的作用[J].生物技术通报,2023,39(12):16-32,17.基金项目
国家自然科学基金项目(32160466,32360483),甘肃省自然科学基金重点项目(23JRRA764) （32160466,32360483）
