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

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

	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
刊名	BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
	2019-05-01
卷号	1860 期号:51 页码:383-390
关键词	Fluctuating light O-2 photo-reduction Photoinhibition Photosystem I Proton gradient Redox state of P700
ISSN号	0005-2728
DOI	10.1016/j.bbabio.2019.03.007
通讯作者	Zhang, Shi-Bao(sbzhang@mail.kib.ac.cn)
英文摘要	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.
WOS研究方向	Biochemistry & Molecular Biology ; Biophysics
语种	英语
WOS记录号	WOS:000466055700004
内容类型	期刊论文
源URL	[http://ir.kib.ac.cn/handle/151853/66768]
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
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.