The Dynamic Changes of Alternative Electron Flows upon Transition from Low to High Light in the Fern Cyrtomium fortune and the Gymnosperm Nageia nagi

doi:10.3390/cells11172768

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	The Dynamic Changes of Alternative Electron Flows upon Transition from Low to High Light in the Fern Cyrtomium fortune and the Gymnosperm Nageia nagi
	Cheng, Jun-Bin; Zhang, Shi-Bao; Wu, Jin-Song; Huang, Wei
	2022
发表期刊	CELLS
卷号	11 期号:17 页码:2768
摘要	In photosynthetic organisms except angiosperms, an alternative electron sink that is mediated by flavodiiron proteins (FLVs) plays the major role in preventing PSI photoinhibition while cyclic electron flow (CEF) is also essential for normal growth under fluctuating light. However, the dynamic changes of FLVs and CEF has not yet been well clarified. In this study, we measured the P700 signal, chlorophyll fluorescence, and electrochromic shift spectra in the fern Cyrtomium fortune and the gymnosperm Nageia nagi. We found that both species could not build up a sufficient proton gradient ( increment pH) within the first 30 s after light abruptly increased. During this period, FLVs-dependent alternative electron flow was functional to avoid PSI over-reduction. This functional time of FLVs was much longer than previously thought. By comparison, CEF was highly activated within the first 10 s after transition from low to high light, which favored energy balancing rather than the regulation of a PSI redox state. When FLVs were inactivated during steady-state photosynthesis, CEF was re-activated to favor photoprotection and to sustain photosynthesis. These results provide new insight into how FLVs and CEF interact to regulate photosynthesis in non-angiosperms.
关键词	energy balancing ferns gymnosperms photoprotection photosynthesis PROTON MOTIVE FORCE PHOTOSYSTEM-I FLAVODIIRON PROTEINS FLUCTUATING LIGHT REGULATORY NETWORK CO2 ASSIMILATION TRANSPORT PHOTOINHIBITION PHOTOSYNTHESIS PHOTOPROTECTION
DOI	10.3390/cells11172768
收录类别	SCI
WOS记录号	WOS:000851043500001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/74734
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Cheng, Jun-Bin,Zhang, Shi-Bao,Wu, Jin-Song,et al. The Dynamic Changes of Alternative Electron Flows upon Transition from Low to High Light in the Fern Cyrtomium fortune and the Gymnosperm Nageia nagi[J]. CELLS,2022,11(17):2768.
APA	Cheng, Jun-Bin,Zhang, Shi-Bao,Wu, Jin-Song,&Huang, Wei.(2022).The Dynamic Changes of Alternative Electron Flows upon Transition from Low to High Light in the Fern Cyrtomium fortune and the Gymnosperm Nageia nagi.CELLS,11(17),2768.
MLA	Cheng, Jun-Bin,et al."The Dynamic Changes of Alternative Electron Flows upon Transition from Low to High Light in the Fern Cyrtomium fortune and the Gymnosperm Nageia nagi".CELLS 11.17(2022):2768.

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