Membrane potential is involved in regulation of photosynthetic reactions in the marine diatom Thalassiosira weissflogii

被引：25

作者：

Antal, Taras K. ^{[1
]}

Osipov, Vladimir ^{[1
]}

Matorin, Dmitriy N. ^{[1
]}

Rubin, Andrey B. ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Fac Biol, Moscow 119992, Russia

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY | 2011年 / 102卷 / 02期

基金：

俄罗斯基础研究基金会;

关键词：

Chlorophyll a fluorescence; OJIP transients; Transthylakoid membrane potential; Thalassiosira weissflogii; DIADINOXANTHIN DE-EPOXIDASE; PHOTOSYSTEM-II; ELECTRON-TRANSFER; CARBON ASSIMILATION; ENERGY-DISSIPATION; PH-DEPENDENCE; CHLOROPLASTS; ACTIVATION; MECHANISMS; COMPLEX;

D O I：

10.1016/j.jphotobiol.2010.11.005

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

High-intensity Chl fluorescence transients (OJIP transients) and light-induced kinetics of the delayed light emission were measured in diatom microalga Thalassiosira weissflogii in the presence of various uncouplers and photosynthetic inhibitors. The I step in the OJIP transients in T. weissflogii was essentially reduced or completely absent but was restored in the presence of uncouplers valinomycin, FCCP, and nigericin. Moreover, valinomycin enhanced,pH-dependent non-photochemical fluorescence quenching following the OJIP rise. In the presence of valinomycin, the transthylakoid membrane potential was significantly inhibited as evaluated by measurements of the delayed light emission. The results suggest a membrane potential control of the fluorescence yield in T. weissflogii. Possible mechanisms underlying the observed effects of uncouplers are discussed. (C) 2010 Elsevier BM. All rights reserved.

引用

页码：169 / 173

页数：5

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