Photoinhibition of photosystem I in Nephrolepis falciformis depends on reactive oxygen species generated in the chloroplast stroma
Huang, Wei1; Tikkanen, Mikko2; Zhang, Shi-Bao1
2018-07-01
发表期刊PHOTOSYNTHESIS RESEARCH
ISSN0166-8595
卷号137期号:1页码:129-140
摘要We studied how high light causes photoinhibition of photosystem I (PSI) in the shade-demanding fern Nephrolepis falciformis, in an attempt to understand the mechanism of PSI photoinhibition under natural field conditions. Intact leaves were treated with constant high light and fluctuating light. Detached leaves were treated with constant high light in the presence and absence of methyl viologen (MV). Chlorophyll fluorescence and P700 signal were determined to estimate photoinhibition. PSI was highly oxidized under high light before treatments. N. falciformis showed significantly stronger photoinhibition of PSI and PSII under constant high light than fluctuating light. These results suggest that high levels of P700 oxidation ratio cannot prevent PSI photoinhibition under high light in N. falciformis. Furthermore, photoinhibition of PSI in N. falciformis was largely accelerated in the presence of MV that promotes the production of superoxide anion radicals in the chloroplast stroma by accepting electrons from PSI. From these results, we propose that photoinhibition of PSI in N. falciformis is mainly caused by superoxide radicals generated in the chloroplast stroma, which is different from the mechanism of PSI photoinhibition in Arabidopsis thaliana and spinach. Here, we provide some new insights into the PSI photoinhibition under natural field conditions.
关键词Chlorophyll Fluorescence High Light Methyl Viologen Photoinhibition Photosystem Superoxide
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/61426
专题资源植物与生物技术所级重点实验室
作者单位1.Chinese Acad Sci, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China
2.Univ Turku, Dept Biochem, Mol Plant Biol, Turku 20014, Finland
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Huang, Wei,Tikkanen, Mikko,Zhang, Shi-Bao. Photoinhibition of photosystem I in Nephrolepis falciformis depends on reactive oxygen species generated in the chloroplast stroma[J]. PHOTOSYNTHESIS RESEARCH,2018,137(1):129-140.
APA Huang, Wei,Tikkanen, Mikko,&Zhang, Shi-Bao.(2018).Photoinhibition of photosystem I in Nephrolepis falciformis depends on reactive oxygen species generated in the chloroplast stroma.PHOTOSYNTHESIS RESEARCH,137(1),129-140.
MLA Huang, Wei,et al."Photoinhibition of photosystem I in Nephrolepis falciformis depends on reactive oxygen species generated in the chloroplast stroma".PHOTOSYNTHESIS RESEARCH 137.1(2018):129-140.
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