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类囊体膜光系统Ⅱ中超氧阴离子生成机制的研究 被引量:4

Studies on Superoxide Formation in Photosystem Ⅱ with a Novel Spin Trap
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摘要 对高等植物类囊体膜的研究表明,易于损伤生物体的超氧阴离子自由基(O2- )可以在其光系统Ⅱ(PSⅡ)中大量生成,并且可能是导致光系统的光抑制和光破坏现象的主要根源之一[1-3].然而,由于超氧阴离子自由基化学性质活泼,而且生物体中含量很低,因此受物理检测手段的局限,对于PSⅡ中O2-的生成机制所知甚少. Abstract Under strong illumination, photosystem Ⅱ (PS Ⅱ )of higher plant was active in superoxide production. However, it keeps unclear about the mechanisms and sites of superoxide formation by PS Ⅱ . Concerning above questions, the molecular mechanisms of superoxide formation by PS II from spinach in this work has been studied. The site range for possible superoxide formation by PS I has been constricted by the study on the donor or acceptor inhibited PS I preparation. The results indicated that the plasto-quinones located at QA and QB of PS I was the primary site responsible for superoxide formation.
出处 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2002年第5期979-981,共3页 Chemical Journal of Chinese Universities
基金 国家重点基础规划项目(批准号:G1998010100) 国家自然科学基金(批准号:39890390 39870208)资助.
关键词 类囊体膜 光系统Ⅱ 氧阴离子自由基 生成机制 活性氧 自旋捕捉-ESR 植物 光合作用 Superoxide anion radical Photosystem Ⅱ Reactive oxygen species Spin trapping-ESR
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共引文献17

同被引文献69

  • 1吕玉光,严宝珍,田秋,赵明月,聂聪,曾波,刘阳平,刘扬.卷烟烟气中活性自由基的自旋捕获ESR研究[J].波谱学杂志,2005,22(1):21-25. 被引量:3
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  • 5Song YG, Liu B, Wang LF, Li MH, Liu Y. Damage oxygen-evolving complex by superoxide anion, hydrogen peroxide and hydroxyl radicals in photoinhibition of photosystem Ⅱ. Photosynth Res, 2006, 90:67-78.
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  • 9Henmi T, Miyao M, Yamamoto Y. Release and reactiveoxygen-mediated damage of the oxygen-evolving complex subunits of PSII during photoinhibition. Plant Cell Physiol, 2004, 45(2): 243-250.
  • 10Pospisil P. Production of reactive oxygen species by photosystem Ⅱ. Biochimica et Biophysica Acta, 2009, 1787:1151-1160.

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