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JXB Advance Access originally published online on August 27, 2004
Journal of Experimental Botany 2005 56(411):383-388; doi:10.1093/jxb/erh230
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Journal of Experimental Botany, Vol. 56, No. 411, © Society for Experimental Biology 2004; all rights reserved

RESEARCH PAPER

The central role of the green alga Chlamydomonas reinhardtii in revealing the mechanism of state transitions

Giovanni Finazzi*

UPR-CNRS 1261 (associée Université Paris 6), Institut de Biologie Physico Chimique, 13 rue Pierre et Marie Curie, F-75005 Paris, France

* Fax: +33 1 58415022. E-mail: giovanni.finazzi{at}ibpc.fr

This review focuses on the essential role played by the green alga Chlamydomonas reinhardtii in revealing both the mechanism and the physiological consequences of state transitions. Two aspects are considered. The first is the role of the cytochrome b6f complex in regulating state transitions, in light of the recently obtained 3D structure. The second is the switch between linear and cyclic electron flow that follows state transitions in Chlamydomonas. Structural and dynamic elements that might be involved in such a switch, as well as its consequences on the energetic metabolism, are discussed.

Key words: Chlamydomonas reinhardtii, energetic metabolism, linear and cyclic electron flow, state transitions


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