光系统Ⅱ颗粒内单线态氧诱导产生超氧阴离子自由基  

Singlet Oxygen Generated in PSⅡ Particles Promotes the Superoxide Generation

作　　者：刘科[1] 孙健[1] 徐英凯[1] 陈中伟[1] 张启元[1] 张兴康[1] 匡廷云[2] 刘扬[1] 

机构地区：[1]中国科学院化学研究所,北京100080 [2]中国科学院植物研究所,北京100093

出　　处：《Acta Botanica Sinica》2001年第9期988-990,共3页Acta Botanica Sinica（植物学报：英文版）

基　　金：国家重点基础研究规划项目 (G19980 10 10 0 ) ;国家自然科学基金项目资助 ( 39890 390 ;39870 2 0 8)~~

摘　　要：The relationship between superoxide and singlet oxygen in PSⅡ particle of spinach under strong illumination was studied with spin-trap ESR technique. The generation of superoxide was increased under D 2O environment which prolonged the half life of singlet oxygen. The generation of superoxide was decreased when histidine existed as a scavenger of singlet oxygen. It is highly possible that the superoxide generated in PSⅡ particle originates from singlet oxygen.The relationship between superoxide and singlet oxygen in PSⅡ particle of spinach under strong illumination was studied with spin-trap ESR technique. The generation of superoxide was increased under D 2O environment which prolonged the half life of singlet oxygen. The generation of superoxide was decreased when histidine existed as a scavenger of singlet oxygen. It is highly possible that the superoxide generated in PSⅡ particle originates from singlet oxygen.

关 键 词：超氧阴离子自由基 单线态氧 PSⅡ 活性氧 自旋捕捉-电子自旋共振技术 

分 类 号：O643.1[理学—物理化学]