植物谷胱甘肽代谢与环境胁迫

谷胱甘肽是植物体内普遍存在的小分子抗氧化物质，它在还原态硫的储存和转运、蛋白质和核酸的合成、酶活性的调节、组织抗氧化特性的维持以及对氧化还原敏感的信号传导的调节中起着重要作用。谷胱甘肽库的大小及其氧化还原状态也与植物对多种生物异源物质及生物与非生物环境胁迫的忍耐密切相关。本文简要综述了近年来人们在植物谷胱甘肽生物合成与代谢、转运、信号传导以及胁迫响应中所取得的研究进展。

Glutathione metabolism and environmental stresses in plants

Glutathione (GSH) is an abundant and ubiquitous antioxidant with proposed roles in the storage and transport of reduced sulphur, the synthesis of proteins and nucleic acids, and the regulation of enzyme activity. It also plays a key role in the maintenance of tissue antioxidant defences and in the regulation of redox-sensitive signal transduction. The size of glutathione pool and its redox status are tightly correlated with the tolerance of plants to a broad spectrum of xenobiotics and a wide series of abiotic and biotic stresses. This review summarizes current knowledge on glutathione biosynthesis and metabolism, transport, signal transduction and their responses to environmental stresses in plants.