In vivo regulation of proton motive force during photosynthetic induction
Huang, Wei1; Quan, Xue1,2; Zhang, Shi-Bao1; Liu, Tao3
2018-04-01
发表期刊ENVIRONMENTAL AND EXPERIMENTAL BOTANY
ISSN0098-8472
卷号148页码:109-116
摘要Thylakoid proton motive force (pint) plays a central role in photosynthesis. However, the regulation of pmf during photosynthetic induction is not well known. In the present study, in order to investigate the importance of cyclic electron flow (CEF) and chloroplastic ATP synthase in pmf formation during photosynthetic induction, we examined chlorophyll fluorescence, P700 signal, electrochromic shift signal for leaves of a low-light species Panax notoginseng and a high-light species Bletilla striata. During the initial induction phase at both low and high light, the activation of CEF associating with low proton conductivity of the chloroplastic ATP synthase (g(H)(+)) resulted in the rapid buildup of proton motive force (pmf) in both species. Furthermore, during photosynthetic induction at high light, the increase in g(H)(+) in B. striate was accompanied with increases in linear electron flow (LEF) and CEF, leading to a stable pmf. Under high light, the high-light species B. striata, with much higher LEF and CEF than P. notoginseng, showed significantly lower pmf owing to the higher g(H)(+). This result suggested that, under high light, CEF mainly contributed to ATP synthase in B. striata but favored lumenal acidification in P. notoginseng. Taking together, during photosynthetic induction, the coordination between CEF and the activity of chloroplastic ATP synthase finely regulated the pmf levels, optimizing photosynthesis and photoprotection.
关键词Cyclic Electron Flow P700 Redox State Photoprotection Photosynthetic Induction Proton Motive Force
语种英语
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文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/60541
专题植物化学与西部植物资源持续利用国家重点实验室
作者单位1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Econ Plants & Biotechnol, Kunming 650201, Yunnan, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Yunnan Agr Univ, Natl & Local Joint Engn Res Ctr Germplasm Utiliza, Kunming 650201, Yunnan, Peoples R China
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Huang, Wei,Quan, Xue,Zhang, Shi-Bao,et al. In vivo regulation of proton motive force during photosynthetic induction[J]. ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2018,148:109-116.
APA Huang, Wei,Quan, Xue,Zhang, Shi-Bao,&Liu, Tao.(2018).In vivo regulation of proton motive force during photosynthetic induction.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,148,109-116.
MLA Huang, Wei,et al."In vivo regulation of proton motive force during photosynthetic induction".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 148(2018):109-116.
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