An energy‐dependent, transient peak in the minute range decay of luminescence, present in CO2‐accumulating cells of Scenedesmus obliquus
- 7 April 1986
- journal article
- Published by Wiley in FEBS Letters
- Vol. 199 (1) , 75-79
- https://doi.org/10.1016/0014-5793(86)81226-1
Abstract
Photosynthetic O2 evolution in the green alga, Scenedesmus obliquus, was shown to be more sensitive to the uncoupler FCCP when assayed in a low Ci medium than in a high Ci medium, indicating the action of an energy‐dependent mechanism for Ci uptake. Low Ci adapted algae exhibited characteristic luminescence decay kinetics with a transient peak 20–60 s after excitation. This peak was abolished by addition of FCCP and HCO− 3. The effect caused by HCO− 3 was partially reversed by methyl viologen. In view of the results obtained, a model is presented in order to discuss the origin of the transient luminescence peak.Keywords
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