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题名: Insusceptibility of oxygen-evolving complex to high light in Betula platyphylla
作者: null(黄伟)1; null(张石宝)1; Hu, Hong1
刊名: JOURNAL OF PLANT RESEARCH
出版日期: 2015-03-01
卷号: 128, 期号:2, 页码:307-315
关键词: High mountain plants ; Cyclic electron flow ; Oxygen-evolving complex ; Photoprotection ; Photosystem II
学科分类: Plant Sciences
DOI: 10.1007/s10265-014-0684-5
通讯作者: Huang,W (reprint author),Chinese Acad Sci,Kunming Inst Bot,Kunming 650201,Yunnan,Peoples R China. ; huangwei@mail.kib.ac.cn
文章类型: Article
英文摘要: High mountain plants growing at high altitude have to regularly cope with high light and high UV radiation that can lead to photodamage of oxygen-evolving complex (OEC). However, the underlying mechanism of photoprotection for OEC in high mountain plants is unclear. Sun leaves of Betula platyphylla were used to examine whether cyclic electron flow (CEF) around photosystem I (PSI) plays an important role in photoprotection for OEC. Our results indicated that the value of ETRI/ETRII ratio significantly increased under high light. With increasing light intensity, non-photochemical quenching (NPQ) gradually increased, and the fraction of P700 that is oxidized in a given state gradually increased. These results indicated that CEF was significantly activated under high light. After treatment with a high light of 1600 mu mol photons m(-2) s(-1) for 8 h, the OEC activity did not decline, but the maximum quantum yield of PSII (F (v) /F (m) ) ratio significantly decreased. These results suggested that CEF-dependent generation of proton gradient across thylakoid membrane protected OEC activity against high light. Furthermore, the stability of PSI activity during exposure to high light suggested that the high CEF activity in B. platyphylla played an important role in photoprotection for PSI activity.
类目[WOS]: Plant Sciences
研究领域[WOS]: Plant Sciences
关键词[WOS]: CYCLIC ELECTRON FLOW ; PHOTOSYSTEM-II ; CHLOROPHYLL FLUORESCENCE ; NAD(P)H DEHYDROGENASE ; EXCITATION-ENERGY ; XANTHOPHYLL CYCLE ; QUANTUM YIELD ; PHOTOINHIBITION ; ARABIDOPSIS ; PHOTOPROTECTION
收录类别: SCI
项目资助者: China Postdoctoral Science Foundation [2013M531994] ; National Natural Science Foundation of China [31300332]
语种: 英语
WOS记录号: WOS:000350826000008
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内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/19366
Appears in Collections:资源植物与生物技术所级重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China
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