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Applied and Environmental Microbiology, May 2009, p. 3366-3369, Vol. 75, No. 10
0099-2240/09/$08.00+0     doi:10.1128/AEM.02737-08
Copyright © 2009, American Society for Microbiology. All Rights Reserved.

Light-Dependent Transcriptional Regulation of Genes of Biogeochemical Interest in the Diploid and Haploid Life Cycle Stages of Emiliania huxleyi{triangledown} ,{dagger}

Sophie Richier,1* Marie-Emmanuelle Kerros,1 Colomban de Vargas,2,3 Liti Haramaty,3 Paul G. Falkowski,3,4 and Jean-Pierre Gattuso1

Laboratoire d'Océanographie de Villefranche, CNRS-UMR 7093, Université Pierre et Marie Curie (Paris 6), 06234 Villefranche-sur-Mer Cedex, France,1 CNRS-UMR 7144, UPMC (Paris 6), Equipe EPPO (Evolution du Plancton et Paleo-Oceans), Station Biologique de Roscoff, 29682 Roscoff, France,2 Institute of Marine and Coastal Sciences, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08901,3 Department of Geological Sciences, Rutgers, The State University of New Jersey, Piscataway, New Jersey 088544

Received 1 December 2008/ Accepted 13 March 2009

The expression of genes of biogeochemical interest in calcifying and noncalcifying life stages of the coccolithophore Emiliania huxleyi was investigated. Transcripts potentially involved in calcification were tested through a light-dark cycle. These transcripts were more abundant in calcifying cells and were upregulated in the light. Their application as potential candidates for in situ biogeochemical proxies is also suggested.

* Corresponding author. Mailing address: Laboratoire d'Océanographie de Villefranche, CNRS-UMR 7093, Université Pierre et Marie Curie (Paris 6), 06234 Villefranche-sur-Mer Cedex, France. Phone: 33 4 93 76 38 33. Fax: 33 4 93 76 38 34. E-mail: richier{at}obs-vlfr.fr

{triangledown} Published ahead of print on 20 March 2009.

{dagger} Supplemental material for this article may be found at http://aem.asm.org/.

Applied and Environmental Microbiology, May 2009, p. 3366-3369, Vol. 75, No. 10
0099-2240/09/$08.00+0     doi:10.1128/AEM.02737-08
Copyright © 2009, American Society for Microbiology. All Rights Reserved.





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