The role of water-water cycle in regulating the redox state of photosystem I under fluctuating light

doi:10.1016/j.bbabio.2019.03.007

	The role of water-water cycle in regulating the redox state of photosystem I under fluctuating light
	Huang, Wei1 ; Yang, Ying-Jie 1,2; Zhang, Shi-Bao1
通讯作者	Zhang, Shi-Bao(sbzhang@mail.kib.ac.cn)
	2019-05-01
发表期刊	BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
ISSN	0005-2728
卷号	1860 期号:51 页码:383-390
摘要	The regulation of photosystem I (PSI) redox state under fluctuating light was investigated for four species using P700 measurement and electrochromic shift analysis. Species included the angiosperms Camellia japonica, Bletilla striate and Arabidopsis thaliana and the fern Cyrtomium fortunei. For the first seconds after transition from low to high light, all species showed relatively low levels of the proton gradient (Delta pH) across the thylakoid membranes. At this moment, PSI was highly oxidized in C. japonica and C. fortunei but was over-reduced in B. striata and A. thaliana. In B. striata and A. thaliana, the redox state of PSI was largely dependent on Delta pH. In contrast, the rapid oxidation of P700 in C. japonica was relatively independent of Delta pH, but was mainly dependent on the outflow of electrons to O-2 via the water-water cycle. In the fern C. fortunei, PSI redox state was rapidly regulated by the fast photo-reduction of O-2 rather than the Delta pH. These results indicate that mechanisms regulating PSI redox state under fluctuating light differ greatly between species. We propose that the water-water cycle is an important mechanism regulating the PSI redox state in angiosperms.
关键词	Fluctuating light O-2 photo-reduction Photoinhibition Photosystem I Proton gradient Redox state of P700
DOI	10.1016/j.bbabio.2019.03.007
收录类别	SCI
语种	英语
WOS记录号	WOS:000466055700004
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/66769
专题	资源植物与生物技术所级重点实验室
通讯作者	Zhang, Shi-Bao
作者单位	1.Chinese Acad Sci, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Huang, Wei,Yang, Ying-Jie,Zhang, Shi-Bao. The role of water-water cycle in regulating the redox state of photosystem I under fluctuating light[J]. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS,2019,1860(51):383-390.
APA	Huang, Wei,Yang, Ying-Jie,&Zhang, Shi-Bao.(2019).The role of water-water cycle in regulating the redox state of photosystem I under fluctuating light.BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS,1860(51),383-390.
MLA	Huang, Wei,et al."The role of water-water cycle in regulating the redox state of photosystem I under fluctuating light".BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1860.51(2019):383-390.

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