Specific roles of cyclic electron flow around photosystem I in photosynthetic regulation in immature and mature leaves

doi:10.1016/j.jplph.2016.11.013

	Specific roles of cyclic electron flow around photosystem I in photosynthetic regulation in immature and mature leaves
	Huang, Wei1,2 ; Yang, Ying-Jie 2; Zhang, Shi-Bao2
	2017-02-01
发表期刊	JOURNAL OF PLANT PHYSIOLOGY
卷号	209 期号:1 页码:76-83
摘要	Cyclic electron flow (CEF) around photosystem I (PSI) is essential for photosynthesis in mature leaves. However, the physiological roles of CEF in immature leaves are little known. Here, we measured the PSI and PSII activities, light response changes in PSI and PSII energy quenching for immature and mature leaves of Erythrophleum guineense grown under full sunlight. Comparing with the maximum quantum yield of PSII (F-v/F-m), the immature leaves had much lower values of the maximum photo-oxidizable P700 (P-m) than the mature leaves, suggesting the unsynchronized development of PSI and PSII activities. Furthermore, the immature leaves displayed significantly lower capacities for the photosynthetic electron flow through PSII (ETRII) and CEF. However, when exposed to high light, the immature leaves displayed higher levels of non-photochemical quenching (NPQ) and P700 oxidation ration [Y(ND)] than mature leaves. Under high light, the similar NPQ values were accompanied with much lower CEF activity in the immature leaves. These results suggest that, in immature leaves, CEF primarily contributes to photoprotection for PSI and PSII via acidification of thylakoid lumen. By comparison, in mature leaves, a large fraction of CEF-dependent generation of Delta pH contributes to ATP synthesis and a relative small proportion favors photoprotection via lumen acidification. These findings highlight the specific roles of CEF in photosynthetic regulation in immature and mature leaves. (C) 2016 Elsevier GmbH. All rights reserved.
关键词	Cyclic Electron Flow Lumen Acidification Non-photochemical Quenching Atp Synthesis Photoprotection Photosynthetic Control
DOI	10.1016/j.jplph.2016.11.013
收录类别	SCI
语种	英语
WOS记录号	WOS:000395687400008
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/46047
专题	资源植物与生物技术所级重点实验室
作者单位	1.Chinese Acad Sci, Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China 2.Chinese Acad Sci, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Huang, Wei,Yang, Ying-Jie,Zhang, Shi-Bao. Specific roles of cyclic electron flow around photosystem I in photosynthetic regulation in immature and mature leaves[J]. JOURNAL OF PLANT PHYSIOLOGY,2017,209(1):76-83.
APA	Huang, Wei,Yang, Ying-Jie,&Zhang, Shi-Bao.(2017).Specific roles of cyclic electron flow around photosystem I in photosynthetic regulation in immature and mature leaves.JOURNAL OF PLANT PHYSIOLOGY,209(1),76-83.
MLA	Huang, Wei,et al."Specific roles of cyclic electron flow around photosystem I in photosynthetic regulation in immature and mature leaves".JOURNAL OF PLANT PHYSIOLOGY 209.1(2017):76-83.

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