Sustained Diurnal Stimulation of Cyclic Electron Flow in Two Tropical Tree Species Erythrophleum guineense and Khaya ivorensis

CORC > 昆明植物研究所 > 中国科学院昆明植物研究所 > 资源植物与生物技术所级重点实验室

	Sustained Diurnal Stimulation of Cyclic Electron Flow in Two Tropical Tree Species Erythrophleum guineense and Khaya ivorensis
	Huang, Wei; Yang, Ying-Jie; Hu, Hong; Cao, Kun-Fang; Zhang, Shi-Bao
刊名	FRONTIERS IN PLANT SCIENCE
	2016-07-19
卷号	7
关键词	cyclic electron flow photoprotection photosystem I photosystem II recovery
英文摘要	The photosystem II (PSII) activity of C-3 plants is usually inhibited at noon associated with high light but can be repaired fast in the afternoon. However, the diurnal variation of photosystem I (PSI) activity is unknown. Although, cyclic electron flow (CEF) has been documented as an important mechanism for photosynthesis, the diurnal variation of CEF in sun leaves is little known. We determined the diurnal changes in PSI and PSII activities, light energy dissipation in PSII and the P700 redox state in two tropical tree species Erythrophleum guineense and Khaya ivorensis grown in an open field. The PSI activity (as indicated by the maximum quantity of photo-oxidizable P700) was maintained stable during the daytime. CEF was strongly activated under high light at noon, accompanying with high levels of non-photochemical quenching (NPQ) and PSI oxidation ratio. In the afternoon, CEF was maintained at a relatively high level under low light, which was accompanied with low levels of NPQ and P700 oxidation ratio. These results indicated that CEF was flexibly modulated during daytime under fluctuating light conditions. Under high light at noon, CEF-dependent generation of proton gradient across the thylakoid membranes (Delta pH) mainly contributed to photoprotection for PSI and PSII. By comparison, at low light in the afternoon, the CEF-dependent formation of Delta pH may be important for PSII repair via an additional ATP synthesis.
类目[WOS]	Plant Sciences
研究领域[WOS]	Plant Sciences
关键词[WOS]	WATER-WATER CYCLE ; HIGH-LIGHT STRESS ; PHOTOSYSTEM-I ; TOBACCO-LEAVES ; D1 PROTEIN ; PHYSIOLOGICAL SIGNIFICANCE ; CHLOROPHYLL FLUORESCENCE ; INDUCED PHOTOINHIBITION ; NAD(P)H DEHYDROGENASE ; CHILLING TEMPERATURE
收录类别	SCI
语种	英语
WOS记录号	WOS:000379875200001
内容类型	期刊论文
源URL	[http://ir.kib.ac.cn/handle/151853/28486]
专题	昆明植物研究所_资源植物与生物技术所级重点实验室
推荐引用方式 GB/T 7714	Huang, Wei,Yang, Ying-Jie,Hu, Hong,et al. Sustained Diurnal Stimulation of Cyclic Electron Flow in Two Tropical Tree Species Erythrophleum guineense and Khaya ivorensis[J]. FRONTIERS IN PLANT SCIENCE,2016,7.
APA	Huang, Wei,Yang, Ying-Jie,Hu, Hong,Cao, Kun-Fang,&Zhang, Shi-Bao.(2016).Sustained Diurnal Stimulation of Cyclic Electron Flow in Two Tropical Tree Species Erythrophleum guineense and Khaya ivorensis.FRONTIERS IN PLANT SCIENCE,7.
MLA	Huang, Wei,et al."Sustained Diurnal Stimulation of Cyclic Electron Flow in Two Tropical Tree Species Erythrophleum guineense and Khaya ivorensis".FRONTIERS IN PLANT SCIENCE 7(2016).