Light-Dependent Transcriptional Regulation of Genes of Biogeochemical Interest in the Diploid and Haploid Life Cycle Stages of Emiliania huxleyi

Sophie Richier , Marie-Emmanuelle Kerros (1, 2) , Colomban de Vargas (3) , Liti Haramaty , Paul G. Falkowski , Jean-Pierre Gattuso (4)

1 LOV - Laboratoire d'océanographie de Villefranche
2 CRRET - Croissance cellulaire, réparation et régénération tissulaires
3 EPEP - Evolution des Protistes et Ecosystèmes Pélagiques
4 OOVM - Observatoire océanologique de Villefranche-sur-mer

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.

Domaines: Sciences du Vivant [q-bio]; Sciences de l'environnement

Sophie Richier, Marie-Emmanuelle Kerros, Colomban de Vargas, Liti Haramaty, Paul G. Falkowski, et al.. Light-Dependent Transcriptional Regulation of Genes of Biogeochemical Interest in the Diploid and Haploid Life Cycle Stages of Emiliania huxleyi. Applied and Environmental Microbiology, 2009, 75 (10), pp.3366-3369. ⟨10.1128/AEM.02737-08⟩. ⟨hal-01258264⟩