A transthylakoid proton gradient and inhibitors induce a non-photochemical fluorescence quenching in unicellular algae Nannochloropsis sp.
文献类型： 外文期刊
作者： Cao, Shaona 1 ; Zhang, Xiaowen 2 ; Xu, Dong 2 ; Fan, Xiao 2 ; Mou, Shanli 2 ; Wang, Yitao 1 ; Ye, Naihao 2 ; Wang, Wenqi 1 ;
作者机构： 1.Qingdao Agr Univ, Qingdao 266109, Peoples R China
2.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China
关键词： Inhibitor;Nannochloropsis sp;Non-photochemical fluorescence quenching;Transthylakoid proton gradient;Xanthophyll cycle
期刊名称：FEBS LETTERS （ 影响因子：4.124； 五年影响因子：3.814 ）
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收录情况： SCI
摘要： Non-photochemical quenching (NPQ) of chlorophyll fluorescence is thought to be an indicator of an essential regulation and photoprotection mechanism against high-light stress in photosynthetic organisms. In this report, special chemicals were used to perturb the kinetics of the ΔpH build-up and the xanthophyll cycle (XC) in Nannochloropsis sp. We found that NPQ was stimulated rapidly on exposure to high light and relaxed rapidly in darkness. The ΔpH could be obligatory for NPQ and ΔpH alone was not sufficient to induce NPQ. The XC, being strictly mediated by ΔpH, was also essential for NPQ. The results demonstrate that the mechanism of NPQ in Nannochloropsis sp. resembled that of diatoms.
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