کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8949242 | 1645702 | 2018 | 43 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chloroplastic ATP synthase optimizes the trade-off between photosynthetic CO2 assimilation and photoprotection during leaf maturation
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کلمات کلیدی
PMFNPQΔpHΔψ - Δρelectron transfer - انتقال الکترونLHC - برخورد دهنده بزرگ هادرون Linear electron flow - جریان الکتریکی خطیNon-photochemical quenching - خنک سازی غیر فتوشیمیاییPhotoprotection - عکسبرداریPhotosynthesis - فتوسنتزLef - لفLight-harvesting complex - مجتمع جمع آوری نورproton motive force - نیروی حرکتی پروتونY(II) - ی (دوم)Y(I) - ی (ی)
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
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 (ÎpH) across the thylakoid membranes but lower values for the activity of chloroplastic ATP synthase (gH+) than the mature leaves. Furthermore, gH+ was significantly and positively correlated with CO2 assimilation rate and linear electron flow (LEF), but negatively correlated with pmf and ÎpH. ÎpH was significantly correlated with LEF and the P700 oxidation ratio. These results indicated that gH+ was regulated to match photosynthetic capacity during leaf maturation, and the formation of pmf and ÎpH was predominantly regulated by the alterations in gH+. In the immature leaves, the high steady-state ÎpH 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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochimica et Biophysica Acta (BBA) - Bioenergetics - Volume 1859, Issue 10, October 2018, Pages 1067-1074
Journal: Biochimica et Biophysica Acta (BBA) - Bioenergetics - Volume 1859, Issue 10, October 2018, Pages 1067-1074
نویسندگان
Wei Huang, Mikko Tikkanen, Yan-Fei Cai, Ji-Hua Wang, Shi-Bao Zhang,