Different Strategies for Photosynthetic Regulation under Fluctuating Light in Two Sympatric Paphiopedilum Species

doi:10.3390/cells10061451

KIB OpenIR

	Different Strategies for Photosynthetic Regulation under Fluctuating Light in Two Sympatric Paphiopedilum Species
	Feng,Jing-Qiu ; Huang,Wei; Wang,Ji-Hua ; Zhang,Shi-Bao
	2021
发表期刊	CELLS
ISSN	2073-4409
卷号	10 期号:6 页码:1451
摘要	Fluctuating light can cause selective photoinhibition of photosystem I (PSI) in angiosperms. Cyclic electron flow (CEF) around PSI and electron flux from water via the electron transport chain to oxygen (the water-water cycle) play important roles in coping with fluctuating light in angiosperms. However, it is unclear whether plant species in the same genus employ the same strategy to cope with fluctuating light. To answer this question, we measured P700 redox kinetics and chlorophyll fluorescence under fluctuating light in two Paphiopedilum (P.) Pftzer (Orchidaceae) species, P. dianthum and P. micranthum. After transition from dark to high light, P. dianthum displayed a rapid re-oxidation of P700, while P. micranthum displayed an over-reduction of P700. Furthermore, the rapid re-oxidation of P700 in P. dianthum was not observed when measured under anaerobic conditions. These results indicated that photo-reduction of O-2 mediated by the water-water cycle was functional in P. dianthum but not in P. micranthum. Within the first few seconds after an abrupt transition from low to high light, PSI was highly oxidized in P. dianthum but was highly reduced in P. micranthum, indicating that the different responses of PSI to fluctuating light between P. micranthum and P. dianthum was attributed to the water-water cycle. In P. micranthum, the lack of the water-water cycle was partially compensated for by an enhancement of CEF. Taken together, P. dianthum and P. micranthum employed different strategies to cope with the abrupt change of light intensity, indicating the diversity of strategies for photosynthetic acclimation to fluctuating light in these two closely related orchid species.
关键词	cyclic electron flow fluctuating light Paphiopedilum photosystem I water-water cycle CYCLIC ELECTRON FLOW WATER-WATER CYCLE PROTON MOTIVE FORCE PHOTOSYSTEM-I FLAVODIIRON PROTEINS PHYSIOLOGICAL-ROLE REDOX STATE GROWTH PHOTOPROTECTION TRANSPORT
DOI	10.3390/cells10061451
WOS记录号	WOS:000665399000001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/73063
专题	中国科学院昆明植物研究所
作者单位	1.[Feng, Jing-Qiu 2.Huang, Wei 3.Chinese Acad Sci, Kunming Inst Bot, Key Lab Econ Plants & Biotechnol, Yunnan Key Lab Wild Plant Resources, Kunming 650201, Yunnan, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Yunnan Acad Agr Sci, Flower Res Inst, Kunming 650205, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Feng,Jing-Qiu,Huang,Wei,Wang,Ji-Hua,et al. Different Strategies for Photosynthetic Regulation under Fluctuating Light in Two Sympatric Paphiopedilum Species[J]. CELLS,2021,10(6):1451.
APA	Feng,Jing-Qiu,Huang,Wei,Wang,Ji-Hua,&Zhang,Shi-Bao.(2021).Different Strategies for Photosynthetic Regulation under Fluctuating Light in Two Sympatric Paphiopedilum Species.CELLS,10(6),1451.
MLA	Feng,Jing-Qiu,et al."Different Strategies for Photosynthetic Regulation under Fluctuating Light in Two Sympatric Paphiopedilum Species".CELLS 10.6(2021):1451.