Physiological responses of the marine diatom Thalassiosira pseudonana to increased pCO2 and seawater acidity
We studied the effects of elevated CO2 concentration and seawater acidity on inorganic carbon acquisition, photoinhibition and photoprotection as well as growth and respiration in the marine diatom Thalassiosira pseudonana. After having grown under the elevated CO2 level (1000 µatm, pH 7.83) at sub-...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.826461 2024-09-15T18:28:18+00:00 Physiological responses of the marine diatom Thalassiosira pseudonana to increased pCO2 and seawater acidity Yang, Gui yuan Gao, Kunshan 2012 text/tab-separated-values, 4682 data points https://doi.pangaea.de/10.1594/PANGAEA.826461 https://doi.org/10.1594/PANGAEA.826461 en eng PANGAEA Lavigne, Héloïse; Gattuso, Jean-Pierre (2011): seacarb: seawater carbonate chemistry with R. R package version 2.4 [webpage]. https://cran.r-project.org/package=seacarb https://doi.pangaea.de/10.1594/PANGAEA.826461 https://doi.org/10.1594/PANGAEA.826461 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Yang, Gui yuan; Gao, Kunshan (2012): Physiological responses of the marine diatom Thalassiosira pseudonana to increased pCO2 and seawater acidity. Marine Environmental Research, 79, 142-151, https://doi.org/10.1016/j.marenvres.2012.06.002 Alkalinity total standard deviation Aragonite saturation state Bicarbonate ion Calcite saturation state Calculated using CO2SYS Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved reciprocal of photosynthetic affinity value Carbonate ion Carbonate system computation flag Carbon dioxide Chlorophyll a Chlorophyll a per cell Chlorophyll c Chlorophyll c per cell Effective absorbance cross-section of photosystem II Effective quantum yield dataset 2012 ftpangaea https://doi.org/10.1594/PANGAEA.82646110.1016/j.marenvres.2012.06.002 2024-07-24T02:31:32Z We studied the effects of elevated CO2 concentration and seawater acidity on inorganic carbon acquisition, photoinhibition and photoprotection as well as growth and respiration in the marine diatom Thalassiosira pseudonana. After having grown under the elevated CO2 level (1000 µatm, pH 7.83) at sub-saturating photosynthetically active radiation (PAR, 75 µmol photons/m**2/s) for 20 generations, photosynthesis and dark respiration of the alga increased by 25% (14.69 ± 2.55 fmol C/cell/h) and by 35% (4.42 ± 0.98 fmol O2/cell/h), respectively, compared to that grown under the ambient CO2 level (390 µatm, pH 8.16), leading to insignificant effects on growth (1.09 ± 0.08 (1/d))v 1.04 ± 0.07 (1/d)). The photosynthetic affinity for CO2 was lowered in the high-CO2 grown cells, reflecting a down-regulation of the CO2 concentrating mechanism (CCM). When exposed to an excessively high level of PAR, photochemical and non-photochemical quenching responded similarly in the low- and high-CO2 grown cells, reflecting that photoinhibition was not influenced by the enriched level of CO2. In T. pseudonana, it appeared that the energy saved due to the down-regulated CCM did not contribute to any additional light stress as previously found in another diatom Phaeodactylum tricornutum, indicating differential physiological responses to ocean acidification between these two diatom species. Dataset Ocean acidification PANGAEA - Data Publisher for Earth & Environmental Science |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Alkalinity total standard deviation Aragonite saturation state Bicarbonate ion Calcite saturation state Calculated using CO2SYS Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved reciprocal of photosynthetic affinity value Carbonate ion Carbonate system computation flag Carbon dioxide Chlorophyll a Chlorophyll a per cell Chlorophyll c Chlorophyll c per cell Effective absorbance cross-section of photosystem II Effective quantum yield |
spellingShingle |
Alkalinity total standard deviation Aragonite saturation state Bicarbonate ion Calcite saturation state Calculated using CO2SYS Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved reciprocal of photosynthetic affinity value Carbonate ion Carbonate system computation flag Carbon dioxide Chlorophyll a Chlorophyll a per cell Chlorophyll c Chlorophyll c per cell Effective absorbance cross-section of photosystem II Effective quantum yield Yang, Gui yuan Gao, Kunshan Physiological responses of the marine diatom Thalassiosira pseudonana to increased pCO2 and seawater acidity |
topic_facet |
Alkalinity total standard deviation Aragonite saturation state Bicarbonate ion Calcite saturation state Calculated using CO2SYS Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved reciprocal of photosynthetic affinity value Carbonate ion Carbonate system computation flag Carbon dioxide Chlorophyll a Chlorophyll a per cell Chlorophyll c Chlorophyll c per cell Effective absorbance cross-section of photosystem II Effective quantum yield |
description |
We studied the effects of elevated CO2 concentration and seawater acidity on inorganic carbon acquisition, photoinhibition and photoprotection as well as growth and respiration in the marine diatom Thalassiosira pseudonana. After having grown under the elevated CO2 level (1000 µatm, pH 7.83) at sub-saturating photosynthetically active radiation (PAR, 75 µmol photons/m**2/s) for 20 generations, photosynthesis and dark respiration of the alga increased by 25% (14.69 ± 2.55 fmol C/cell/h) and by 35% (4.42 ± 0.98 fmol O2/cell/h), respectively, compared to that grown under the ambient CO2 level (390 µatm, pH 8.16), leading to insignificant effects on growth (1.09 ± 0.08 (1/d))v 1.04 ± 0.07 (1/d)). The photosynthetic affinity for CO2 was lowered in the high-CO2 grown cells, reflecting a down-regulation of the CO2 concentrating mechanism (CCM). When exposed to an excessively high level of PAR, photochemical and non-photochemical quenching responded similarly in the low- and high-CO2 grown cells, reflecting that photoinhibition was not influenced by the enriched level of CO2. In T. pseudonana, it appeared that the energy saved due to the down-regulated CCM did not contribute to any additional light stress as previously found in another diatom Phaeodactylum tricornutum, indicating differential physiological responses to ocean acidification between these two diatom species. |
format |
Dataset |
author |
Yang, Gui yuan Gao, Kunshan |
author_facet |
Yang, Gui yuan Gao, Kunshan |
author_sort |
Yang, Gui yuan |
title |
Physiological responses of the marine diatom Thalassiosira pseudonana to increased pCO2 and seawater acidity |
title_short |
Physiological responses of the marine diatom Thalassiosira pseudonana to increased pCO2 and seawater acidity |
title_full |
Physiological responses of the marine diatom Thalassiosira pseudonana to increased pCO2 and seawater acidity |
title_fullStr |
Physiological responses of the marine diatom Thalassiosira pseudonana to increased pCO2 and seawater acidity |
title_full_unstemmed |
Physiological responses of the marine diatom Thalassiosira pseudonana to increased pCO2 and seawater acidity |
title_sort |
physiological responses of the marine diatom thalassiosira pseudonana to increased pco2 and seawater acidity |
publisher |
PANGAEA |
publishDate |
2012 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.826461 https://doi.org/10.1594/PANGAEA.826461 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Supplement to: Yang, Gui yuan; Gao, Kunshan (2012): Physiological responses of the marine diatom Thalassiosira pseudonana to increased pCO2 and seawater acidity. Marine Environmental Research, 79, 142-151, https://doi.org/10.1016/j.marenvres.2012.06.002 |
op_relation |
Lavigne, Héloïse; Gattuso, Jean-Pierre (2011): seacarb: seawater carbonate chemistry with R. R package version 2.4 [webpage]. https://cran.r-project.org/package=seacarb https://doi.pangaea.de/10.1594/PANGAEA.826461 https://doi.org/10.1594/PANGAEA.826461 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.82646110.1016/j.marenvres.2012.06.002 |
_version_ |
1810469653074411520 |