Proton cellular influx as a probable mechanism of variation potential influence on photosynthesis in pea.
作者： VLADIMIR SUKHOV , OKSANA SHERSTNEVA , LYUBOV SUROVA , LYUBOV KATICHEVA , VLADIMIR VODENEEV
DOI: 10.1111/PCE.12321
关键词: ATPase 、 Photosynthesis 、 Pisum 、 Biochemistry 、 Biology 、 Respiration 、 Chloroplast 、 Cellular respiration 、 Biophysics 、 Plant cell 、 Protonophore
摘要: Electrical signals (action potential and variation potential, VP) caused by environmental stimuli are known to induce various physiological responses in plants, including changes photosynthesis; however, their functional mechanisms remain unclear. In this study, the influence of VP on photosynthesis pea (Pisum sativum L.) was investigated proton participation process analysed. VP, induced local heating, inactivated activated respiration, with initiation photosynthetic response connected inactivation dark stage; direct light stage also probable. generation accompanied pH increases apoplasts (0.17-0.30 pH unit) decreases cytoplasm (0.18-0.60 pH unit), which probably reflected H(+) -ATPase influx during electrical event. Imitation using protonophore carbonyl cyanide m-chlorophenylhydrazone (CCCP) a that similar VP-induced response. Experiments chloroplast suspensions showed decreased external an analogous its magnitude depended change. Thus, present results cellular probable mechanism VP's pea. Potential means action for discussed.
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