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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ftdoajarticles:oai:doaj.org/article:2822ea5e091c4f198d6bd47a60983396 2023-05-15T14:51:35+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 Thomas Lacour Jade Larivière Joannie Ferland Flavienne Bruyant Johann Lavaud Marcel Babin 2018-10-01T00:00:00Z https://doi.org/10.3389/fmars.2018.00354 https://doaj.org/article/2822ea5e091c4f198d6bd47a60983396 EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fmars.2018.00354/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2018.00354 https://doaj.org/article/2822ea5e091c4f198d6bd47a60983396 Frontiers in Marine Science, Vol 5 (2018) Arctic diatom photosynthesis sustained NPQ irradiance temperature Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2018 ftdoajarticles https://doi.org/10.3389/fmars.2018.00354 2022-12-31T05:49:32Z 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 Directory of Open Access Journals: DOAJ Articles Arctic Frontiers in Marine Science 5 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic diatom photosynthesis sustained NPQ irradiance temperature Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
Arctic diatom photosynthesis sustained NPQ irradiance temperature Science Q General. Including nature conservation geographical distribution QH1-199.5 Thomas Lacour Jade Larivière Joannie Ferland Flavienne Bruyant Johann Lavaud Marcel Babin 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 Science Q General. Including nature conservation geographical distribution QH1-199.5 |
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 |
Thomas Lacour Jade Larivière Joannie Ferland Flavienne Bruyant Johann Lavaud Marcel Babin |
author_facet |
Thomas Lacour Jade Larivière Joannie Ferland Flavienne Bruyant Johann Lavaud Marcel Babin |
author_sort |
Thomas Lacour |
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 S.A. |
publishDate |
2018 |
url |
https://doi.org/10.3389/fmars.2018.00354 https://doaj.org/article/2822ea5e091c4f198d6bd47a60983396 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Frontiers in Marine Science, Vol 5 (2018) |
op_relation |
https://www.frontiersin.org/article/10.3389/fmars.2018.00354/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2018.00354 https://doaj.org/article/2822ea5e091c4f198d6bd47a60983396 |
op_doi |
https://doi.org/10.3389/fmars.2018.00354 |
container_title |
Frontiers in Marine Science |
container_volume |
5 |
_version_ |
1766322714872643584 |