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The role of water-water cycle in regulating the redox state of photosystem I under fluctuating light
Huang, Wei1; Yang, Ying-Jie1,2; Zhang, Shi-Bao1
Corresponding AuthorZhang, Shi-Bao(sbzhang@mail.kib.ac.cn)
2019-05-01
Source PublicationBIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
ISSN0005-2728
Volume1860Issue:51Pages:383-390
AbstractThe 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.
KeywordFluctuating light O-2 photo-reduction Photoinhibition Photosystem I Proton gradient Redox state of P700
DOI10.1016/j.bbabio.2019.03.007
Indexed BySCI
Language英语
WOS Research AreaBiochemistry & Molecular Biology ; Biophysics
WOS SubjectBiochemistry & Molecular Biology ; Biophysics
WOS IDWOS:000466055700004
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/66769
Collection资源植物与生物技术所级重点实验室
Corresponding AuthorZhang, Shi-Bao
Affiliation1.Chinese Acad Sci, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
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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