The Role of Sustained Photoprotective Non-photochemical Quenching in Low Temperature and High Light Acclimation in the Bloom-Forming Arctic Diatom Thalassiosira gravida
Thalassiosira gravida is a major Arctic diatom responsible for the under-ice spring bloom. We investigated T. gravida physiological plasticity growing it at two temperatures (0 and 5°C) and under different light intensities typically found in its natural environment. T. gravida showed remarkable the...
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ftarchimer:oai:archimer.ifremer.fr:57387 2023-05-15T14:51:38+02:00 The Role of Sustained Photoprotective Non-photochemical Quenching in Low Temperature and High Light Acclimation in the Bloom-Forming Arctic Diatom Thalassiosira gravida Lacour, Thomas Lariviere, Jade Ferland, Joannie Bruyant, Flavienne Lavaud, Johann Babin, Marcel 2018-10 application/pdf https://archimer.ifremer.fr/doc/00462/57387/59468.pdf https://archimer.ifremer.fr/doc/00462/57387/59469.pdf https://doi.org/10.3389/fmars.2018.00354 https://archimer.ifremer.fr/doc/00462/57387/ eng eng Frontiers Media Sa https://archimer.ifremer.fr/doc/00462/57387/59468.pdf https://archimer.ifremer.fr/doc/00462/57387/59469.pdf doi:10.3389/fmars.2018.00354 https://archimer.ifremer.fr/doc/00462/57387/ info:eu-repo/semantics/openAccess restricted use Frontiers In Marine Science (2296-7745) (Frontiers Media Sa), 2018-10 , Vol. 5 , N. 354 , P. 16p. Arctic diatom photosynthesis sustained NPQ irradiance temperature text Publication info:eu-repo/semantics/article 2018 ftarchimer https://doi.org/10.3389/fmars.2018.00354 2023-01-10T23:50:40Z Thalassiosira gravida is a major Arctic diatom responsible for the under-ice spring bloom. We investigated T. gravida physiological plasticity growing it at two temperatures (0 and 5°C) and under different light intensities typically found in its natural environment. T. gravida showed remarkable thermal- and photo-acclimatory plasticity including: low light saturation parameter for growth (KE) and photosynthesis (EK), low μmax but relatively high Chl a/C, low C/N, and decreasing light-saturated carbon fixation rate (PmC) with increasing growth irradiance. T. gravida also showed remarkable photoprotective features, namely a strong sustained non-photochemical quenching (NPQs, hour kinetics relaxation) supported by a high amount of xanthophyll cycle pigments. T. gravida growth remained possible under a wide range of irradiances but photosynthetic plasticity was higher at moderately low light (up to ~50 μmol photons m−2 s−1), nevertheless corresponding to the mean in situ conditions under which it predominates, i.e., underneath the spring thin-ice punctuated with melting ponds. The potential role of NPQs in the photophysiological plasticity of T. gravida is discussed. Article in Journal/Newspaper Arctic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic Frontiers in Marine Science 5 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Arctic diatom photosynthesis sustained NPQ irradiance temperature |
spellingShingle |
Arctic diatom photosynthesis sustained NPQ irradiance temperature Lacour, Thomas Lariviere, Jade Ferland, Joannie Bruyant, Flavienne Lavaud, Johann Babin, Marcel The Role of Sustained Photoprotective Non-photochemical Quenching in Low Temperature and High Light Acclimation in the Bloom-Forming Arctic Diatom Thalassiosira gravida |
topic_facet |
Arctic diatom photosynthesis sustained NPQ irradiance temperature |
description |
Thalassiosira gravida is a major Arctic diatom responsible for the under-ice spring bloom. We investigated T. gravida physiological plasticity growing it at two temperatures (0 and 5°C) and under different light intensities typically found in its natural environment. T. gravida showed remarkable thermal- and photo-acclimatory plasticity including: low light saturation parameter for growth (KE) and photosynthesis (EK), low μmax but relatively high Chl a/C, low C/N, and decreasing light-saturated carbon fixation rate (PmC) with increasing growth irradiance. T. gravida also showed remarkable photoprotective features, namely a strong sustained non-photochemical quenching (NPQs, hour kinetics relaxation) supported by a high amount of xanthophyll cycle pigments. T. gravida growth remained possible under a wide range of irradiances but photosynthetic plasticity was higher at moderately low light (up to ~50 μmol photons m−2 s−1), nevertheless corresponding to the mean in situ conditions under which it predominates, i.e., underneath the spring thin-ice punctuated with melting ponds. The potential role of NPQs in the photophysiological plasticity of T. gravida is discussed. |
format |
Article in Journal/Newspaper |
author |
Lacour, Thomas Lariviere, Jade Ferland, Joannie Bruyant, Flavienne Lavaud, Johann Babin, Marcel |
author_facet |
Lacour, Thomas Lariviere, Jade Ferland, Joannie Bruyant, Flavienne Lavaud, Johann Babin, Marcel |
author_sort |
Lacour, Thomas |
title |
The Role of Sustained Photoprotective Non-photochemical Quenching in Low Temperature and High Light Acclimation in the Bloom-Forming Arctic Diatom Thalassiosira gravida |
title_short |
The Role of Sustained Photoprotective Non-photochemical Quenching in Low Temperature and High Light Acclimation in the Bloom-Forming Arctic Diatom Thalassiosira gravida |
title_full |
The Role of Sustained Photoprotective Non-photochemical Quenching in Low Temperature and High Light Acclimation in the Bloom-Forming Arctic Diatom Thalassiosira gravida |
title_fullStr |
The Role of Sustained Photoprotective Non-photochemical Quenching in Low Temperature and High Light Acclimation in the Bloom-Forming Arctic Diatom Thalassiosira gravida |
title_full_unstemmed |
The Role of Sustained Photoprotective Non-photochemical Quenching in Low Temperature and High Light Acclimation in the Bloom-Forming Arctic Diatom Thalassiosira gravida |
title_sort |
role of sustained photoprotective non-photochemical quenching in low temperature and high light acclimation in the bloom-forming arctic diatom thalassiosira gravida |
publisher |
Frontiers Media Sa |
publishDate |
2018 |
url |
https://archimer.ifremer.fr/doc/00462/57387/59468.pdf https://archimer.ifremer.fr/doc/00462/57387/59469.pdf https://doi.org/10.3389/fmars.2018.00354 https://archimer.ifremer.fr/doc/00462/57387/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Frontiers In Marine Science (2296-7745) (Frontiers Media Sa), 2018-10 , Vol. 5 , N. 354 , P. 16p. |
op_relation |
https://archimer.ifremer.fr/doc/00462/57387/59468.pdf https://archimer.ifremer.fr/doc/00462/57387/59469.pdf doi:10.3389/fmars.2018.00354 https://archimer.ifremer.fr/doc/00462/57387/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.3389/fmars.2018.00354 |
container_title |
Frontiers in Marine Science |
container_volume |
5 |
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1766322768434954240 |