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Response of the calcifying coccolithophore Emiliania huxleyi to low pH/high pCO2: from physiology to molecular level

Response of the calcifying coccolithophore Emiliania huxleyi to low pH/high pCO2: from physiology to molecular level
Response of the calcifying coccolithophore Emiliania huxleyi to low pH/high pCO2: from physiology to molecular level
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/pCO2 in the widespread and abundant coccolithophore Emiliania huxleyi. Batch cultures were subjected to increased partial pressure of CO2 (pCO2; i.e. decreased pH), and the changes in expression of four functional gene classes directly or indirectly related to calcification were investigated. Increased pCO2 did not affect the calcification rate and only carbonic anhydrase transcripts exhibited a significant down-regulation. Our observation that elevated pCO2 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.
0025-3162
551-560
Richier, Sophie
0fc0b375-6918-4c06-9d6f-229f6c4046ca
Fiorini, Sarah
48d28d30-f298-48aa-89c0-1b32a4e1369a
Kerros, Marie-Emmanuelle
71f6064b-a6a7-4c7c-b68a-220aee0f85cb
von Dassow, Peter
74ef5c44-af62-4509-949a-30b6616d05ff
Gattuso, Jean-Pierre
f806dd4c-d5da-4163-b09a-4e4bd5265299
Richier, Sophie
0fc0b375-6918-4c06-9d6f-229f6c4046ca
Fiorini, Sarah
48d28d30-f298-48aa-89c0-1b32a4e1369a
Kerros, Marie-Emmanuelle
71f6064b-a6a7-4c7c-b68a-220aee0f85cb
von Dassow, Peter
74ef5c44-af62-4509-949a-30b6616d05ff
Gattuso, Jean-Pierre
f806dd4c-d5da-4163-b09a-4e4bd5265299

Richier, Sophie, Fiorini, Sarah, Kerros, Marie-Emmanuelle, von Dassow, Peter and Gattuso, Jean-Pierre (2011) Response of the calcifying coccolithophore Emiliania huxleyi to low pH/high pCO2: from physiology to molecular level. Marine Biology, 158 (3), 551-560. (doi:10.1007/s00227-010-1580-8).

Record type: Article

Abstract

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/pCO2 in the widespread and abundant coccolithophore Emiliania huxleyi. Batch cultures were subjected to increased partial pressure of CO2 (pCO2; i.e. decreased pH), and the changes in expression of four functional gene classes directly or indirectly related to calcification were investigated. Increased pCO2 did not affect the calcification rate and only carbonic anhydrase transcripts exhibited a significant down-regulation. Our observation that elevated pCO2 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.

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Published date: 2011

Identifiers

Local EPrints ID: 179299
URI: http://eprints.soton.ac.uk/id/eprint/179299
ISSN: 0025-3162
PURE UUID: ea86ebc0-c246-465a-90ce-fe180ab7174a

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Date deposited: 31 Mar 2011 13:49
Last modified: 16 Jul 2019 23:43

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