Chloroplastic ATP synthase optimizes the trade-off between photosynthetic CO2 assimilation and photoprotection during leaf maturation
Huang, Wei1; Tikkanen, Mikko2; Cai, Yan-Fei3; Wang, Ji-Hua3; Zhang, Shi-Bao1
2018-10-01
发表期刊BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
ISSN0005-2728
卷号1859期号:10页码:1067-1074
摘要In the present study, we studied the role of chloroplastic ATP synthase in photosynthetic regulation during leaf maturation. We measured gas exchange, chlorophyll fluorescence, P700 redox state, and the electrochromic shift signal in mature and immature leaves. Under high light, the immature leaves displayed high levels of non-photochemical quenching (NPQ) and P700 oxidation ratio, and higher values for proton motive force (pmf) and proton gradient (Delta pH) across the thylakoid membranes but lower values for the activity of chloroplastic ATP synthase (g(H)(+)) than the mature leaves. Furthermore, g(H)(+) was significantly and positively correlated with CO2 assimilation rate and linear electron flow (LEF), but negatively correlated with pmf and Delta pH. Delta pH was significantly correlated with LEF and the P700 oxidation ratio. These results indicated that g(H)(+) was regulated to match photosynthetic capacity during leaf maturation, and the formation of pmf and Delta pH was predominantly regulated by the alterations in g(H)(+). In the immature leaves, the high steady-state Delta pH increased lumen acidification, which, in turn, stimulated photoprotection for the photosynthetic apparatus via NPQ induction and photosynthetic control. Our results highlighted the importance of chloroplastic ATP synthase in optimizing the trade-off between CO2 assimilation and photoprotection during leaf maturation.
关键词Chloroplastic ATP synthase Electron transfer Leaf maturation Photoprotection Photosynthesis Proton motive force
资助信息National Natural Science Foundation of China; Youth Innovation Promotion Association of the Chinese Academy of Sciences; Scientific and Technological Leading Talent Project of Yunnan Province
语种英语
资助项目National Natural Science Foundation of China[31670343] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2016347] ; Scientific and Technological Leading Talent Project of Yunnan Province[2016HA005]
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文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/62421
专题资源植物与生物技术所级重点实验室
通讯作者Wang, Ji-Hua; Zhang, Shi-Bao
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, Finland
3.Yunnan Acad Agr Sci, Flower Res Inst, Kunming, Yunnan, Peoples R China
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GB/T 7714
Huang, Wei,Tikkanen, Mikko,Cai, Yan-Fei,et al. Chloroplastic ATP synthase optimizes the trade-off between photosynthetic CO2 assimilation and photoprotection during leaf maturation[J]. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS,2018,1859(10):1067-1074.
APA Huang, Wei,Tikkanen, Mikko,Cai, Yan-Fei,Wang, Ji-Hua,&Zhang, Shi-Bao.(2018).Chloroplastic ATP synthase optimizes the trade-off between photosynthetic CO2 assimilation and photoprotection during leaf maturation.BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS,1859(10),1067-1074.
MLA Huang, Wei,et al."Chloroplastic ATP synthase optimizes the trade-off between photosynthetic CO2 assimilation and photoprotection during leaf maturation".BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1859.10(2018):1067-1074.
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