植物谷胱甘肽过氧化物酶研究进展.pdf

植物学通报�2005, 22 (3): 350�356
Chinese Bulletin of Botany
专题介绍
植物谷胱甘肽过氧化物酶研究进展①
��苗雨晨���白�玲��苗�琛��陈�珈��宋纯鹏②
1(河南大学生命科学学院开封 475001)
2(中国农业大学植物生理生化国家重点实验室北京 100094)
摘要氧化胁迫可诱导植物多种防御酶的产生, 其中包括超氧化物歧化酶(SOD, )、抗坏血
酸过氧化物酶(APX, )、过氧化氢酶(CAT, )和谷胱甘肽过氧化物酶(GPXs,
)。它们在清除活性氧过程中起着不同的作用。GPXs是动物体内清除氧自由基的主要酶类,
但它在植物中的功能报道甚少。最近几年研究表明, 植物体内也存在类似于哺乳动物的GPXs家族, 并
对其功能研究已初见端倪。本文综述了有关GPXs的结构以及植物GPXs功能的研究进展。
关键词氧化胁迫, 谷胱甘肽过氧化物酶, 磷脂氢过氧化物谷胱甘肽过氧化物酶
Progress in Plant Glutathione Peroxidase
1,2MIAO Yu-Chen 1BAI Ling 1MIAO Chen 2CHEN Jia 1SONG Chun-Peng②
1(College of Life Sciences, Henan University, Kaifeng 475001)
2(State Key Laboratory for Plant Physiology and Biochemistry, China Agricultural University,
Beijing 100094)
Abstract Oxidative stress in plants induces several antioxidant enzymes, including superox-
ide dismutase (SOD, EC ), ascorbate peroxidase (APX, EC ), catalase (CAT, E.
) and glutathione peroxidase (GPX, ), which have specific roles in scav-
enging reactive oxygen species. Glutathione peroxidases are a family of key enzymes involved
in scavenging oxyradicals in animals. Only recently has evidence for the existence of this
enzyme in plants been reported. However, the information about the function of plant GPXs is
limited, according to our current knowledge. The paper reviews the stru