Response of the calcifying coccolithophore Emiliania huxleyi to low pH/high pCO(2): from physiology to molecular level - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue Marine Biology Année : 2011

Response of the calcifying coccolithophore Emiliania huxleyi to low pH/high pCO(2): from physiology to molecular level

Résumé

The emergence of ocean acidification as a significant threat to calcifying organisms in marine ecosystems creates a pressing need to understand the physiological and molecular mechanisms by which calcification is affected by environmental parameters. We report here, for the first time, changes in gene expression induced by variations in pH/pCO(2) in the widespread and abundant coccolithophore Emiliania huxleyi. Batch cultures were subjected to increased partial pressure of CO2 (pCO(2); i.e. decreased pH), and the changes in expression of four functional gene classes directly or indirectly related to calcification were investigated. Increased pCO(2) did not affect the calcification rate and only carbonic anhydrase transcripts exhibited a significant down-regulation. Our observation that elevated pCO(2) induces only limited changes in the transcription of several transporters of calcium and bicarbonate gives new significant elements to understand cellular mechanisms underlying the early response of E. huxleyi to CO2-driven ocean acidification.

Domaines

Océanographie

Dates et versions

hal-03502034 , version 1 (24-12-2021)

Identifiants

Citer

Sophie Richier, Sarah Fiorini, Marie-Emmanuelle Kerros, Peter Von Dassow, Jean-Pierre Gattuso. Response of the calcifying coccolithophore Emiliania huxleyi to low pH/high pCO(2): from physiology to molecular level. Marine Biology, 2011, 158 (3), pp.551-560. ⟨10.1007/s00227-010-1580-8⟩. ⟨hal-03502034⟩
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