非生物胁迫下植物体内活性氧清除酶系统的研究进展

Studies on the Scavenging Enzymes of Reactive Oxygen Species in Plants Under Abiotic Stress

植物受到非生物胁迫时,细胞内活性氧的产生及其清除会失去平衡,活性氧过量积累会导致植物体内氧化胁迫。文章简要概述了在非生物胁迫下,植物体内产生的活性氧使植物体内细胞受到氧化胁迫危害,介绍了活性氧清除酶系统在非生物胁迫中的作用,该清除酶系统主要包括超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)、抗坏血酸过氧化物酶(APX)、脱氢抗坏血酸还原酶(DHR)、谷胱甘肽还原酶(GR)和谷胱甘肽过氧化物酶(GPX)。

The production of reactive oxygen species （ROS） would increase in plant cells under abiotic stress. The excessive ROS could lead to oxidative stress and lead to the unbalance between the production and the scavenging of ROS in plant. Plants have evolved enzymatic detoxication mechanisms that efficiently scavenge ROS. The enzymatic detoxication system includes superoxide dismutase （SOD） , peroxidase （POD, ascorbate peroxidase （ APX）, catalase （ CAT）, dehydroascorbate reductase（ DHR, glutathione reductase（GR） and glutathione peroxidase （GPX）. The productive mechanism of ROS and the damage of oxidative stress in plant are reviewed in this paper.