Ocean acidification mediates photosynthetic response to UV radiation and temperature increase in the diatom Phaeodactylum tricornutum
Increasing atmospheric CO2 concentration is responsible for progressive ocean acidification, ocean warming as well as decreased thickness of upper mixing layer (UML), thus exposing phytoplankton cells not only to lower pH and higher temperatures but also to higher levels of solar UV radiation. In or...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.823078 2023-05-15T17:49:43+02:00 Ocean acidification mediates photosynthetic response to UV radiation and temperature increase in the diatom Phaeodactylum tricornutum Li, Yahe Gao, Kunshan Villafañe, Virginia E Helbling, E Walter 2012-11-20 text/tab-separated-values, 41489 data points https://doi.pangaea.de/10.1594/PANGAEA.823078 https://doi.org/10.1594/PANGAEA.823078 en eng PANGAEA Lavigne, Héloïse; Gattuso, Jean-Pierre (2011): seacarb: seawater carbonate chemistry with R. R package version 2.4. https://cran.r-project.org/package=seacarb https://doi.pangaea.de/10.1594/PANGAEA.823078 https://doi.org/10.1594/PANGAEA.823078 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Li, Yahe; Gao, Kunshan; Villafañe, Virginia E; Helbling, E Walter (2012): Ocean acidification mediates photosynthetic response to UV radiation and temperature increase in the diatom Phaeodactylum tricornutum. Biogeosciences, 9(10), 3931-3942, https://doi.org/10.5194/bg-9-3931-2012 Alkalinity total standard deviation Aragonite saturation state Bicarbonate ion Bottles or small containers/Aquaria (<20 L) Calcite saturation state Calculated using CO2SYS Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved Carbonate ion Carbonate system computation flag Carbon dioxide Chromista Damage/repair ratio Damage rate Effective quantum yield Fugacity of carbon dioxide (water) at sea surface temperature (wet air) Identification Laboratory experiment Laboratory strains Light Net photosynthesis rate Net photosynthesis rate per cell Non photochemical quenching North Pacific OA-ICC Ocean Acidification International Coordination Centre Ochrophyta Partial pressure of carbon dioxide (water) at sea surface temperature (wet air) Pelagos Dataset 2012 ftpangaea https://doi.org/10.1594/PANGAEA.823078 https://doi.org/10.5194/bg-9-3931-2012 2023-01-20T09:01:52Z Increasing atmospheric CO2 concentration is responsible for progressive ocean acidification, ocean warming as well as decreased thickness of upper mixing layer (UML), thus exposing phytoplankton cells not only to lower pH and higher temperatures but also to higher levels of solar UV radiation. In order to evaluate the combined effects of ocean acidification, UV radiation and temperature, we used the diatom Phaeodactylum tricornutum as a model organism and examined its physiological performance after grown under two CO2 concentrations (390 and 1000 µatm) for more than 20 generations. Compared to the ambient CO2 level (390 µatm), growth at the elevated CO2 concentration increased non-photochemical quenching (NPQ) of cells and partially counteracted the harm to PS II (photosystem II) caused by UV-A and UV-B. Such an effect was less pronounced under increased temperature levels. The ratio of repair to UV-B induced damage decreased with increased NPQ, reflecting induction of NPQ when repair dropped behind the damage, and it was higher under the ocean acidification condition, showing that the increased pCO2 and lowered pH counteracted UV-B induced harm. As for photosynthetic carbon fixation rate which increased with increasing temperature from 15 to 25 °C, the elevated CO2 and temperature levels synergistically interacted to reduce the inhibition caused by UV-B and thus increase the carbon fixation. Dataset Ocean acidification PANGAEA - Data Publisher for Earth & Environmental Science Pacific |
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 Bottles or small containers/Aquaria (<20 L) Calcite saturation state Calculated using CO2SYS Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved Carbonate ion Carbonate system computation flag Carbon dioxide Chromista Damage/repair ratio Damage rate Effective quantum yield Fugacity of carbon dioxide (water) at sea surface temperature (wet air) Identification Laboratory experiment Laboratory strains Light Net photosynthesis rate Net photosynthesis rate per cell Non photochemical quenching North Pacific OA-ICC Ocean Acidification International Coordination Centre Ochrophyta Partial pressure of carbon dioxide (water) at sea surface temperature (wet air) Pelagos |
spellingShingle |
Alkalinity total standard deviation Aragonite saturation state Bicarbonate ion Bottles or small containers/Aquaria (<20 L) Calcite saturation state Calculated using CO2SYS Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved Carbonate ion Carbonate system computation flag Carbon dioxide Chromista Damage/repair ratio Damage rate Effective quantum yield Fugacity of carbon dioxide (water) at sea surface temperature (wet air) Identification Laboratory experiment Laboratory strains Light Net photosynthesis rate Net photosynthesis rate per cell Non photochemical quenching North Pacific OA-ICC Ocean Acidification International Coordination Centre Ochrophyta Partial pressure of carbon dioxide (water) at sea surface temperature (wet air) Pelagos Li, Yahe Gao, Kunshan Villafañe, Virginia E Helbling, E Walter Ocean acidification mediates photosynthetic response to UV radiation and temperature increase in the diatom Phaeodactylum tricornutum |
topic_facet |
Alkalinity total standard deviation Aragonite saturation state Bicarbonate ion Bottles or small containers/Aquaria (<20 L) Calcite saturation state Calculated using CO2SYS Calculated using seacarb after Nisumaa et al. (2010) Carbon inorganic dissolved Carbonate ion Carbonate system computation flag Carbon dioxide Chromista Damage/repair ratio Damage rate Effective quantum yield Fugacity of carbon dioxide (water) at sea surface temperature (wet air) Identification Laboratory experiment Laboratory strains Light Net photosynthesis rate Net photosynthesis rate per cell Non photochemical quenching North Pacific OA-ICC Ocean Acidification International Coordination Centre Ochrophyta Partial pressure of carbon dioxide (water) at sea surface temperature (wet air) Pelagos |
description |
Increasing atmospheric CO2 concentration is responsible for progressive ocean acidification, ocean warming as well as decreased thickness of upper mixing layer (UML), thus exposing phytoplankton cells not only to lower pH and higher temperatures but also to higher levels of solar UV radiation. In order to evaluate the combined effects of ocean acidification, UV radiation and temperature, we used the diatom Phaeodactylum tricornutum as a model organism and examined its physiological performance after grown under two CO2 concentrations (390 and 1000 µatm) for more than 20 generations. Compared to the ambient CO2 level (390 µatm), growth at the elevated CO2 concentration increased non-photochemical quenching (NPQ) of cells and partially counteracted the harm to PS II (photosystem II) caused by UV-A and UV-B. Such an effect was less pronounced under increased temperature levels. The ratio of repair to UV-B induced damage decreased with increased NPQ, reflecting induction of NPQ when repair dropped behind the damage, and it was higher under the ocean acidification condition, showing that the increased pCO2 and lowered pH counteracted UV-B induced harm. As for photosynthetic carbon fixation rate which increased with increasing temperature from 15 to 25 °C, the elevated CO2 and temperature levels synergistically interacted to reduce the inhibition caused by UV-B and thus increase the carbon fixation. |
format |
Dataset |
author |
Li, Yahe Gao, Kunshan Villafañe, Virginia E Helbling, E Walter |
author_facet |
Li, Yahe Gao, Kunshan Villafañe, Virginia E Helbling, E Walter |
author_sort |
Li, Yahe |
title |
Ocean acidification mediates photosynthetic response to UV radiation and temperature increase in the diatom Phaeodactylum tricornutum |
title_short |
Ocean acidification mediates photosynthetic response to UV radiation and temperature increase in the diatom Phaeodactylum tricornutum |
title_full |
Ocean acidification mediates photosynthetic response to UV radiation and temperature increase in the diatom Phaeodactylum tricornutum |
title_fullStr |
Ocean acidification mediates photosynthetic response to UV radiation and temperature increase in the diatom Phaeodactylum tricornutum |
title_full_unstemmed |
Ocean acidification mediates photosynthetic response to UV radiation and temperature increase in the diatom Phaeodactylum tricornutum |
title_sort |
ocean acidification mediates photosynthetic response to uv radiation and temperature increase in the diatom phaeodactylum tricornutum |
publisher |
PANGAEA |
publishDate |
2012 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.823078 https://doi.org/10.1594/PANGAEA.823078 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Supplement to: Li, Yahe; Gao, Kunshan; Villafañe, Virginia E; Helbling, E Walter (2012): Ocean acidification mediates photosynthetic response to UV radiation and temperature increase in the diatom Phaeodactylum tricornutum. Biogeosciences, 9(10), 3931-3942, https://doi.org/10.5194/bg-9-3931-2012 |
op_relation |
Lavigne, Héloïse; Gattuso, Jean-Pierre (2011): seacarb: seawater carbonate chemistry with R. R package version 2.4. https://cran.r-project.org/package=seacarb https://doi.pangaea.de/10.1594/PANGAEA.823078 https://doi.org/10.1594/PANGAEA.823078 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.823078 https://doi.org/10.5194/bg-9-3931-2012 |
_version_ |
1766156153556828160 |