植物抗氧化剂谷胱甘肽研究进展

Research Progress in Plant Antioxidant Glutathione(Review)

谷胱甘肽(glutathione,GSH)是植物体内一种重要的抗氧化剂,可以清除细胞代谢过程中产生的多余活性氧自由基,减少由于膜脂过氧化作用而对细胞造成的伤害,在植物抵抗逆境胁迫中起着非常重要的作用。本文主要从植物体内GSH的种类、GSH对植物细胞保护的生理机制(清除细胞内自由基、与有毒重金属物质结合形成无毒化合物、吸收和转运氨基酸)和GSH对逆境胁迫(温度胁迫、干旱胁迫、重金属胁迫和盐胁迫)植物的保护作用等方面进行了总结分析。GSH的研究对于深入了解和认识植物抗氧化剂在代谢过程中的生理作用及清除活性氧自由基的机理具有积极作用,对研究植物抗逆性具有重要的意义。

Glutathione（GSH）,an important antioxidant in plants,can scavenge the redundant active oxygen free radicals produced during cell metabolism processes and relieve the damage caused by membrane lipid peroxidation.GSH contributes to the role of adversity stress resistance in plants.This review summarizes GSH activities including the types of GSH in plants,the application of GSH and the physiological mechanism of GSH protecting plant cells including scavenging intracellular active oxygen free radicals,forming non-toxic compound by combining with toxic heavy metal material,absorbing and transporting amino acid,resisting to adversity stress（temperature stress,drought stress,heavy metal stress and salt stress）.GSH metabolism plays a positive role for understanding the physiological function of plant antioxidants,knowing the mechanism of scavenging active oxygen free radicals,and studying plant resistance.