Antagonistic effects of light I and II on chlorophyll a fluorescence yield and P700 turnover as monitors of carbon dioxide depletion in intact algal and cyanobacterial cells |
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| Authors: | Govindjee Jan F. H. Snel Oscar J. De Vos Jack J. S. van Rensen |
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| Affiliation: | Dept of Plant Biology, Univ. of Illionis, 265 Morrill Hall, 505 S. Goodwin Ave, Urbana, IL 61801-3707, USA;;Dept of Plant Physiol., Agric. Univ., Arboretumlaan 4, 6703 BD Wageningen, The Netherlands |
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| Abstract: | Depletion of carbon dioxide from cells by formate treatment not only causes a cessation of carbon dioxide fixation, but also a dramatic decrease in the rate of electron transfer between QA, the primary plastoquinone electron acceptor of photosystem II, and the cytochrome b6/f complex. We show here that this latter phenomenon can be conveniently monitored by the antagonistic effects of light absorbed in photosystems I and II on chlorophyll a fluorescence yield and P700 turnover in intact cells of green algae and cyanobacteria. |
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| Keywords: | Algae bicarbonate effect cyanobacteria electron transport fluorescence light-state transitions photosynthesis P700 |
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