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JXB Advance Access published online on September 14, 2007
Journal of Experimental Botany, doi:10.1093/jxb/erm187
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© The Author [2007]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

RESEARCH PAPER

Two members of the Arabidopsis CLC (chloride channel) family, AtCLCe and AtCLCf, are associated with thylakoid and Golgi membranes, respectively

Anne Marmagne1 *,{dagger}, Marion Vinauger-Douard1 *, Dario Monachello1,{ddagger}, Andéol Falcon de Longevialle1,§, Céline Charon1,¶, Michèle Allot1, Fabrice Rappaport2, Francis-André Wollman2, Hélène Barbier-Brygoo1 and Geneviève Ephritikhine1,3,||

1Institut des Sciences du Végétal, Centre National de la Recherche Scientifique (CNRS–UPR 2355), Bât 22, avenue de la Terrasse, 91198 Gif sur Yvette Cedex, France
2Institut de Biologie Physico-Chimique, UMR 7141 CNRS-Université Paris VI, 13 rue Pierre et Marie Curie, 75005 Paris, France
3Université Paris Diderot Paris7, UFR Biologie Sciences de la Nature, 2 place Jussieu, 75251 Paris cedex 05, France

|| To whom correspondence should be addresssed. E-mail: Genevieve.Ephritikhine{at}isv.cnrs-gif.fr

Though numerous pieces of evidence point to major physiological roles for anion channels in plants, progress in the understanding of their biological functions is limited by the small number of genes identified so far. Seven chloride channel (CLC) members could be identified in the Arabidopsis genome, amongst which AtCLCe and AtCLCf are both more closely related to bacterial CLCs than the other plant CLCs. It is shown here that AtCLCe is targeted to the thylakoid membranes in chloroplasts and, in agreement with this subcellular localization, that the clce mutants display a phenotype related to photosynthesis activity. The AtCLCf protein is localized in Golgi membranes and functionally complements the yeast gef1 mutant disrupted in the single CLC gene encoding a Golgi-associated protein.

Key words: Arabidopsis, CLC chloride channels, Golgi membranes, thylakoids

* These authors contributed equally to this work.

{dagger} Present address: UMR de Génétique Végétale, INRA/Université Paris XI/CNRS/INA-PG, Ferme du Moulon, 91190 Gif sur Yvette, France.

{ddagger} Present address: URGV, CNRS-INRA, 2 rue Gaston Crémieux, 91057 Evry cedex, France.

§ Present address: Plant Energy Biology, ARC centre of Excellence, University of Western Australia, 35 Stirling Highway Crawley 6009 WA, Australia.

Present address: Institut de Biotechnologie des Plantes, Université Paris-sud (CNRS-UPS, UMR 8618), Bât. 630, 91405 Orsay cedex, France.

Received 13 February 2007; Revised 17 July 2007 Accepted 18 July 2007


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