XTBG OpenIR  > 植物生理生态研究组
Superoxide generated in the chloroplast stroma causes photoinhibition of photosystem I in the shade-establishing tree species Psychotria henryi
Huang, Wei; Yang, Ying-Jie; Zhang, Jiao-Lin; et al
2017
Source PublicationPHOTOSYNTHESIS RESEARCH
Volume132Issue:3Pages:293-303
AbstractOur previous studies indicated that high light induced significant photoinhibition of photosystem I (PSI) in the shade-establishing tree species Psychotria henryi. However, the underlying mechanism has not been fully clarified. In the present study, in order to investigate the mechanism of PSI photoinhibition in P. henryi, we treated detached leaves with constant high light in the presence of methyl viologen (MV) or a soluble alpha-tocopherol analog, 2,2,5,7,8-pentamethyl-6-chromanol (PMC). We found that MV significantly depressed photochemical quantum yields in PSI and PSII when compared to PMC. On condition that no PSI photoinhibition happened, although cyclic electron flow (CEF) was abolished in the MV-treated samples, P700 oxidation ratio was maintain at higher levels than the PMC-treated samples. In the presence of PMC, PSI photoinhibition little changed but PSII photoinhibition was significantly alleviated. Importantly, PSI photoinhibition was largely accelerated in the presence of MV, which stimulates the production of superoxide and subsequently other reactive oxygen species at the chloroplast stroma by accepting electrons from PSI. Furthermore, MV largely aggravated PSII photoinhibition when compared to control. These results suggest that high P700 oxidation ratio cannot prevent PSI photoinhibition in P. henryi. Furthermore, the superoxide produced in the chloroplast stroma is critical for PSI photoinhibition in the higher plant P. henryi, which is opposite to the mechanism underlying PSI photoinhibition in Arabidopsis thaliana and spinach. These findings highlight a new mechanism of PSI photoinhibition in higher plants.
KeywordChlorophyll Fluorescence Methyl Viologen P700 Oxidation Photosystem i Photoinhibition Superoxide
Language英语
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/10499
Collection植物生理生态研究组
Recommended Citation
GB/T 7714
Huang, Wei,Yang, Ying-Jie,Zhang, Jiao-Lin,et al. Superoxide generated in the chloroplast stroma causes photoinhibition of photosystem I in the shade-establishing tree species Psychotria henryi[J]. PHOTOSYNTHESIS RESEARCH,2017,132(3):293-303.
APA Huang, Wei,Yang, Ying-Jie,Zhang, Jiao-Lin,&et al.(2017).Superoxide generated in the chloroplast stroma causes photoinhibition of photosystem I in the shade-establishing tree species Psychotria henryi.PHOTOSYNTHESIS RESEARCH,132(3),293-303.
MLA Huang, Wei,et al."Superoxide generated in the chloroplast stroma causes photoinhibition of photosystem I in the shade-establishing tree species Psychotria henryi".PHOTOSYNTHESIS RESEARCH 132.3(2017):293-303.
Files in This Item: Download All
File Name/Size DocType Version Access License
Superoxide generated(1248KB) 开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Huang, Wei]'s Articles
[Yang, Ying-Jie]'s Articles
[Zhang, Jiao-Lin]'s Articles
Baidu academic
Similar articles in Baidu academic
[Huang, Wei]'s Articles
[Yang, Ying-Jie]'s Articles
[Zhang, Jiao-Lin]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Huang, Wei]'s Articles
[Yang, Ying-Jie]'s Articles
[Zhang, Jiao-Lin]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Superoxide generated in the chloroplast stroma causes photoinhibition of photosystem I in the shade-establishing tree species Psychotria henryi .pdf
Format: Adobe PDF
This file does not support browsing at this time
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.