|Insusceptibility of oxygen-evolving complex to high light in Betula platyphylla|
|Huang, Wei; Zhang, Shi-Bao; Hu, Hong; Huang,W (reprint author),Chinese Acad Sci,Kunming Inst Bot,Kunming 650201,Yunnan,Peoples R China.; firstname.lastname@example.org
|发表期刊||JOURNAL OF PLANT RESEARCH
|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.|
|关键词||High Mountain Plants
Cyclic Electron Flow
|资助信息||China Postdoctoral Science Foundation [2013M531994]; National Natural Science Foundation of China |
|通讯作者||Huang,W (reprint author),Chinese Acad Sci,Kunming Inst Bot,Kunming 650201,Yunnan,Peoples R China.; email@example.com|
|作者单位||Chinese Acad Sci, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China|
Huang, Wei,Zhang, Shi-Bao,Hu, Hong,et al. Insusceptibility of oxygen-evolving complex to high light in Betula platyphylla[J]. JOURNAL OF PLANT RESEARCH,2015,128(2):307-315.
Huang, Wei,Zhang, Shi-Bao,Hu, Hong,Huang,W ,&firstname.lastname@example.org.(2015).Insusceptibility of oxygen-evolving complex to high light in Betula platyphylla.JOURNAL OF PLANT RESEARCH,128(2),307-315.
Huang, Wei,et al."Insusceptibility of oxygen-evolving complex to high light in Betula platyphylla".JOURNAL OF PLANT RESEARCH 128.2(2015):307-315.