| Автор | Shimazaki, Ken-ichiro |
| Автор | Sugahara, Kiyoshi |
| Дата выпуска | 1979 |
| dc.description | The phytotoxic effects of sulfur dioxide (SO<sub>2</sub>) were investigated by fumigating spinach plants with SO<sub>2</sub>. Inhibition of 2,6-dichloroindophenol (DCIP) photoreduction was observed in spinach chloroplasts isolated from fumigated leaves. NADP and DCIP photoreductions were inhibited to a similar extent by fumigation with 2.0 ppm SO<sub>2</sub> but electron flow from reduced DCIP to NADP was not affected. When electron flow from H<sub>2</sub>O to NADP was inhibited by 36%, a 39% inhibition of non-cyclic photophosphorylation was observed. However, phenazine methosulfate(PMS)-catalyzed cyclic photophosphorylation was as active as in the control chloroplasts. Moreover, in the presence of PMS, no significant suppression was observed in the extent of light-induced H<sup>+</sup> uptake or in the rate of H<sup>+</sup> efflux in chloroplasts. From these results, it can be concluded that SO<sub>2</sub> inhibits the electron flow driven by photosystem II when plants have been fumigated with SO<sub>2</sub>.In spinach leaves fumigated with SO<sub>2</sub>, the rate of photosynthetic O<sub>2</sub> evolution was reduced under light-limited conditions, while the rate of respiratory O<sub>2</sub> uptake changed slightly. |
| Формат | application.pdf |
| Издатель | Oxford University Press |
| Копирайт | © Oxford University Press |
| Тема | Chloroplasts |
| Тема | Effect of SO<sub>2</sub> |
| Тема | Electron transport |
| Тема | Photosystem II |
| Тема | Photosynthesis |
| Тема | Sulfur dioxide |
| Тема | Articles |
| Название | Specific inhibition of photosystem II activity in chloroplasts by fumigation of spinach leaves with SO<sub>2</sub> |
| Тип | research-article |
| Electronic ISSN | 1471-9053 |
| Print ISSN | 0032-0781 |
| Журнал | Plant and Cell Physiology |
| Том | 20 |
| Первая страница | 947 |
| Последняя страница | 955 |
| Аффилиация | Division of Environmental Biology, the National Institute for Environmental StudiesYatabe, Ibaraki 300-21, Japan |
| Выпуск | 5 |
