Responses of the emiliania huxleyi proteome to ocean acidification
Ocean acidification due to rising atmospheric CO2 is expected to affect the physiology of important calcifying marine organisms, but the nature and magnitude of change is yet to be established. In coccolithophores, different species and strains display varying calcification responses to ocean acidif...
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ftucambridgeesc:oai:eprints.esc.cam.ac.uk:2731 2023-05-15T17:50:21+02:00 Responses of the emiliania huxleyi proteome to ocean acidification Jones, Bethan M. Iglesias-Rodriguez, M. Debora Skipp, Paul J. Edwards, Richard J. Greaves, Mervyn Elderfield, Henry O'Connor, David 2013-04 application/pdf image/png http://eprints.esc.cam.ac.uk/2731/ http://eprints.esc.cam.ac.uk/2731/1/journal.pone.0061868.pdf http://eprints.esc.cam.ac.uk/2731/2/journal.pone.0061868.g003.png http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0061868 https://doi.org/10.1371/journal.pone.0061868 en eng PLOS http://eprints.esc.cam.ac.uk/2731/1/journal.pone.0061868.pdf http://eprints.esc.cam.ac.uk/2731/2/journal.pone.0061868.g003.png Jones, Bethan M. and Iglesias-Rodriguez, M. Debora and Skipp, Paul J. and Edwards, Richard J. and Greaves, Mervyn and Elderfield, Henry and O'Connor, David (2013) Responses of the emiliania huxleyi proteome to ocean acidification. PLoS ONE, 8 (4). e61868. ISSN eISSN-1932-6203 DOI https://doi.org/10.1371/journal.pone.0061868 <https://doi.org/10.1371/journal.pone.0061868> cc_by CC-BY 01 - Climate Change and Earth-Ocean Atmosphere Systems Article PeerReviewed 2013 ftucambridgeesc https://doi.org/10.1371/journal.pone.0061868 2020-08-27T18:09:24Z Ocean acidification due to rising atmospheric CO2 is expected to affect the physiology of important calcifying marine organisms, but the nature and magnitude of change is yet to be established. In coccolithophores, different species and strains display varying calcification responses to ocean acidification, but the underlying biochemical properties remain unknown. We employed an approach combining tandem mass-spectrometry with isobaric tagging (iTRAQ) and multiple database searching to identify proteins that were differentially expressed in cells of the marine coccolithophore species Emiliania huxleyi (strain NZEH) between two CO2 conditions: 395 (~current day) and ~1340 p.p.m.v. CO2. Cells exposed to the higher CO2 condition contained more cellular particulate inorganic carbon (CaCO3) and particulate organic nitrogen and carbon than those maintained in present-day conditions. These results are linked with the observation that cells grew slower under elevated CO2, indicating cell cycle disruption. Under high CO2 conditions, coccospheres were larger and cells possessed bigger coccoliths that did not show any signs of malformation compared to those from cells grown under present-day CO2 levels. No differences in calcification rate, particulate organic carbon production or cellular organic carbon: nitrogen ratios were observed. Results were not related to nutrient limitation or acclimation status of cells. At least 46 homologous protein groups from a variety of functional processes were quantified in these experiments, of which four (histones H2A, H3, H4 and a chloroplastic 30S ribosomal protein S7) showed down-regulation in all replicates exposed to high CO2, perhaps reflecting the decrease in growth rate. We present evidence of cellular stress responses but proteins associated with many key metabolic processes remained unaltered. Our results therefore suggest that this E. huxleyi strain possesses some acclimation mechanisms to tolerate future CO2 scenarios, although the observed decline in growth rate may be an overriding factor affecting the success of this ecotype in future oceans. Article in Journal/Newspaper Ocean acidification University of Cambridge, Department of Earth Sciences: ESC Publications PLoS ONE 8 4 e61868 |
institution |
Open Polar |
collection |
University of Cambridge, Department of Earth Sciences: ESC Publications |
op_collection_id |
ftucambridgeesc |
language |
English |
topic |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
spellingShingle |
01 - Climate Change and Earth-Ocean Atmosphere Systems Jones, Bethan M. Iglesias-Rodriguez, M. Debora Skipp, Paul J. Edwards, Richard J. Greaves, Mervyn Elderfield, Henry O'Connor, David Responses of the emiliania huxleyi proteome to ocean acidification |
topic_facet |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
description |
Ocean acidification due to rising atmospheric CO2 is expected to affect the physiology of important calcifying marine organisms, but the nature and magnitude of change is yet to be established. In coccolithophores, different species and strains display varying calcification responses to ocean acidification, but the underlying biochemical properties remain unknown. We employed an approach combining tandem mass-spectrometry with isobaric tagging (iTRAQ) and multiple database searching to identify proteins that were differentially expressed in cells of the marine coccolithophore species Emiliania huxleyi (strain NZEH) between two CO2 conditions: 395 (~current day) and ~1340 p.p.m.v. CO2. Cells exposed to the higher CO2 condition contained more cellular particulate inorganic carbon (CaCO3) and particulate organic nitrogen and carbon than those maintained in present-day conditions. These results are linked with the observation that cells grew slower under elevated CO2, indicating cell cycle disruption. Under high CO2 conditions, coccospheres were larger and cells possessed bigger coccoliths that did not show any signs of malformation compared to those from cells grown under present-day CO2 levels. No differences in calcification rate, particulate organic carbon production or cellular organic carbon: nitrogen ratios were observed. Results were not related to nutrient limitation or acclimation status of cells. At least 46 homologous protein groups from a variety of functional processes were quantified in these experiments, of which four (histones H2A, H3, H4 and a chloroplastic 30S ribosomal protein S7) showed down-regulation in all replicates exposed to high CO2, perhaps reflecting the decrease in growth rate. We present evidence of cellular stress responses but proteins associated with many key metabolic processes remained unaltered. Our results therefore suggest that this E. huxleyi strain possesses some acclimation mechanisms to tolerate future CO2 scenarios, although the observed decline in growth rate may be an overriding factor affecting the success of this ecotype in future oceans. |
format |
Article in Journal/Newspaper |
author |
Jones, Bethan M. Iglesias-Rodriguez, M. Debora Skipp, Paul J. Edwards, Richard J. Greaves, Mervyn Elderfield, Henry O'Connor, David |
author_facet |
Jones, Bethan M. Iglesias-Rodriguez, M. Debora Skipp, Paul J. Edwards, Richard J. Greaves, Mervyn Elderfield, Henry O'Connor, David |
author_sort |
Jones, Bethan M. |
title |
Responses of the emiliania huxleyi proteome to ocean acidification |
title_short |
Responses of the emiliania huxleyi proteome to ocean acidification |
title_full |
Responses of the emiliania huxleyi proteome to ocean acidification |
title_fullStr |
Responses of the emiliania huxleyi proteome to ocean acidification |
title_full_unstemmed |
Responses of the emiliania huxleyi proteome to ocean acidification |
title_sort |
responses of the emiliania huxleyi proteome to ocean acidification |
publisher |
PLOS |
publishDate |
2013 |
url |
http://eprints.esc.cam.ac.uk/2731/ http://eprints.esc.cam.ac.uk/2731/1/journal.pone.0061868.pdf http://eprints.esc.cam.ac.uk/2731/2/journal.pone.0061868.g003.png http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0061868 https://doi.org/10.1371/journal.pone.0061868 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://eprints.esc.cam.ac.uk/2731/1/journal.pone.0061868.pdf http://eprints.esc.cam.ac.uk/2731/2/journal.pone.0061868.g003.png Jones, Bethan M. and Iglesias-Rodriguez, M. Debora and Skipp, Paul J. and Edwards, Richard J. and Greaves, Mervyn and Elderfield, Henry and O'Connor, David (2013) Responses of the emiliania huxleyi proteome to ocean acidification. PLoS ONE, 8 (4). e61868. ISSN eISSN-1932-6203 DOI https://doi.org/10.1371/journal.pone.0061868 <https://doi.org/10.1371/journal.pone.0061868> |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1371/journal.pone.0061868 |
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PLoS ONE |
container_volume |
8 |
container_issue |
4 |
container_start_page |
e61868 |
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