| Autor: |
A A, Volgusheva, G P, Kukarskikh, T K, Antal, O G, Lavrukhina, T E, Krendeleva, A B, Rubin |
| Rok vydání: |
2008 |
| Předmět: |
|
| Zdroj: |
Biofizika. 53(5) |
| ISSN: |
0006-3029 |
| Popis: |
The influence of dibromothymoquinone on chlorophyll fluorescence was studied in Chlamydomonas reinhardtii cells using PAM and PEA fluorometers. The reagent affected differently control cells incubated in complete medium and S-starved cells. Thus, the fluorescence yield in the control essentially increased in the presence of dibromothymoquinone, which can be due to the inactivation of light-harvesting complex II protein kinase, followed by the suppression of membrane transition from high-fluorescence state 1 to low-fluorescence state 2. On the contrary, S-starved cells with membranes in state 2 showed a lower fluorescence yield in the presence of dibromothymoquinone than without it. The JIP test of OJIP fluorescence transients suggests that dibromothymoquinone inhibits both light-harvesting complex II kinase and photosynthetic electron transport when added to control, while in starved cells, it acts predominantly as an electron acceptor. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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