摘要
传统的观点认为耗氧的呼吸电子传递链存在于线粒体中,放氧的光合电子传递链位于叶绿体中。质体末端氧化酶(plastid terminal oxidase,PTOX)的发现证实叶绿体中也存在着一条耗氧的呼吸电子传递途径。本文从拟南芥的immutans条斑突变体入手,回顾了PTOX的发现历史,简单介绍了PTOX基因的特性和PTOX蛋白的结构与活性,重点论述了PTOX对植物的光保护作用、类胡萝卜素的生物合成、叶绿体的早期发育等重要过程中的生理作用。
It is well known that mitochondria possess oxygen-consuming respiratory electron pathways, and the oxygen-evolving photosynthetic electron pathway is located in chloroplasts. The discovery of a plastid terminal oxidase （PTOX） in the chloroplast demonstrates that chloroplasts also harbor an oxygen-consuming respiratory electron pathway. This paper reviews the characterization of PTOX from the famous Arabidopsis variegation mutant immutans. It focuses on the molecular features of PTOX and its global physiological roles in a number of essential processes, such as photoprotection, carotenoid biosynthesis, and early stages of chloroplast devel- opment.
出处
《植物生理学报》
CAS
CSCD
北大核心
2016年第11期1710-1720,共11页
Plant Physiology Journal
基金
国家自然科学基金(31270284)~~
关键词
质体末端氧化酶
叶绿体呼吸
条斑化突变体
叶绿体发育
plastid terminal oxidase
chlororespiration
variegation mutants
chloroplast development
