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黄伟, 张石宝, 曹坤芳. 高等植物环式电子传递的生理作用[J]. 植物科学学报, 2012, 30(1): 100-106. DOI: 10.3724/SP.J.1142.2012.10100
引用本文: 黄伟, 张石宝, 曹坤芳. 高等植物环式电子传递的生理作用[J]. 植物科学学报, 2012, 30(1): 100-106. DOI: 10.3724/SP.J.1142.2012.10100
HUANG Wei, ZHANG Shi-Bao, CAO Kun-Fang. Physiological Role of Cyclic Electron Flow in Higher Plants[J]. Plant Science Journal, 2012, 30(1): 100-106. DOI: 10.3724/SP.J.1142.2012.10100
Citation: HUANG Wei, ZHANG Shi-Bao, CAO Kun-Fang. Physiological Role of Cyclic Electron Flow in Higher Plants[J]. Plant Science Journal, 2012, 30(1): 100-106. DOI: 10.3724/SP.J.1142.2012.10100

高等植物环式电子传递的生理作用

Physiological Role of Cyclic Electron Flow in Higher Plants

  • 摘要: 环式电子传递做为一种可供选择的电子传递途径之一,近几年被证实它对于许多高等植物的生长是必需的。环式电子传递通过促进跨类囊体膜质子梯度的建立一方面激发ATP合成酶合成ATP,另一方面加强了光系统Ⅱ处的热耗散,稳定了放氧复合体,从而保护光系统Ⅱ免受光抑制。同时,它还可以缓解光系统Ⅰ处电子受体的过度还原,减少超氧阴离子在光系统Ⅰ处的合成,防止光系统Ⅰ受到光抑制。本文简要地综述了环式电子传递的途径、其参与ATP合成的作用、对光系统Ⅱ和光系统Ⅰ光保护作用及其对环境胁迫的响应和调节,并对环式电子传递的研究提出了展望。

     

    Abstract: As an important alternative electron flow,cyclic electron flow (CEF) is essential for photosynthesis in many higher plants.The CEF-dependent generation of proton gradient across thylakoid membranes not only activates ATP synthesis but also protects photosystemⅡfrom photoinhibition through activating non-photochemical quenching and stabilizing oxygen-evolving complexes. Furthermore,CEF can alleviate the over-reduction of acceptor side of photosystemⅠ(PSⅠ) and generation of superoxide anion,and thus protect PSⅠ from photoinhibition.This review briefly summarizes the pathways of CEF,roles of CEF,response of CEF to environmental stress,and proposes perspectives.

     

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