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Transmembrane movements of artificial redox mediators in relation to electron transport and ionic currents in chloroplastsстатья
Информация о цитировании статьи получена из
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Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Bulychev Alexander A., van Voorthuysen Tijmen, Vredenberg Wim J.
- Журнал: Physiologia Plantarum
- Том: 98
- Номер: 3
- Год издания: 1996
- Издательство: Blackwell Publishing Inc.
- Местоположение издательства: United Kingdom
- Первая страница: 605
- Последняя страница: 611
- DOI: 10.1111/j.1399-3054.1996.tb05717.x
- Аннотация: Electrochemical data obtained with TMPD+-sensitive electrodes indicate that ammonium-uncoupled chloroplasts retain TMPD (N,N,N′,N′-tetramethyl-p-phenylenediamine) mainly in the reduced form during illumination, whereas uncoupled DCMU-treated chloroplasts accumulate TMPD in the oxidized form (TMPD+). This observation indicates that the reduced plastoquinol is the preferred electron donor for photosystem I (PSI) and TMPD can only compete efficiently when plastoquinone reduction is blocked. After adding DCMU the formation of a transmembrane gradient for TMPD+ is reflected by a slow-down of the electrogenic electron transport and by the emerging of the overshoot of the membrane current in the light-off response. A light-dependent increase in photoelectric current generated by chloroplasts in the presence of NH4Cl and TMPD is observed and considered to be caused by a reversible release of current limitation in the interfacial conductance barriers in the lumen.
- Добавил в систему: Булычев Александр Александрович