Type II photosensitized oxidation in senescent microalgal cells at different latitudes: Does low under-ice irradiance in polar regions enhance efficiency?

Comparison of Type II photosensitized oxidation of lipids (the photodynamic effect) and photodegradation of chlorophyll (sensitizer photobleaching) in samples of particulate matter collected previously from locations representing a diverse range of latitudes reveals an enhancement of the photooxidat...

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Published in:Science of The Total Environment
Main Authors: Rontani, Jean-françois, Amiraux, Rémi, Smik, Lukas, Wakeham Stuart, G., Paulmier, Aurélien, Vaultier, Frédéric, Ha, Sun-yong, Min, Jun-oh, Belt Simon, T.
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier BV 2021
Subjects:
Online Access:https://archimer.ifremer.fr/doc/00685/79659/82423.pdf
https://doi.org/10.1016/j.scitotenv.2021.146363
https://archimer.ifremer.fr/doc/00685/79659/
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record_format openpolar
spelling ftarchimer:oai:archimer.ifremer.fr:79659 2023-05-15T18:18:19+02:00 Type II photosensitized oxidation in senescent microalgal cells at different latitudes: Does low under-ice irradiance in polar regions enhance efficiency? Rontani, Jean-françois Amiraux, Rémi Smik, Lukas Wakeham Stuart, G. Paulmier, Aurélien Vaultier, Frédéric Ha, Sun-yong Min, Jun-oh Belt Simon, T. 2021-07 application/pdf https://archimer.ifremer.fr/doc/00685/79659/82423.pdf https://doi.org/10.1016/j.scitotenv.2021.146363 https://archimer.ifremer.fr/doc/00685/79659/ eng eng Elsevier BV https://archimer.ifremer.fr/doc/00685/79659/82423.pdf doi:10.1016/j.scitotenv.2021.146363 https://archimer.ifremer.fr/doc/00685/79659/ info:eu-repo/semantics/openAccess restricted use Science Of The Total Environment (0048-9697) (Elsevier BV), 2021-07 , Vol. 779 , P. 146363 (9p.) Photodynamic effect Senescent phytoplankton Latitude Polar regions Solar irradiance text Publication info:eu-repo/semantics/article 2021 ftarchimer https://doi.org/10.1016/j.scitotenv.2021.146363 2022-03-22T23:50:01Z Comparison of Type II photosensitized oxidation of lipids (the photodynamic effect) and photodegradation of chlorophyll (sensitizer photobleaching) in samples of particulate matter collected previously from locations representing a diverse range of latitudes reveals an enhancement of the photooxidation of lipids at the expense of chlorophyll photodegradation in the polar regions. The efficiency of the photodynamic effect appears to be particularly high in sinking particles collected under sea ice and is attributed to the rapid settling of highly aggregated sympagic algae to depths of low light transmission favouring the photodynamic effect at the expense of photobleaching of the sensitizer. Paradoxically, the low efficiency of Type II photosensitized oxidation of lipids observed in temperate and equatorial regions is associated with high solar irradiances in these regions. Type II photosensitized oxidation of lipids in senescent phytoplankton seems thus to be strongly dependent of the intensity of solar irradiance. Article in Journal/Newspaper Sea ice Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Science of The Total Environment 779 146363
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 Photodynamic effect
Senescent phytoplankton
Latitude
Polar regions
Solar irradiance
spellingShingle Photodynamic effect
Senescent phytoplankton
Latitude
Polar regions
Solar irradiance
Rontani, Jean-françois
Amiraux, Rémi
Smik, Lukas
Wakeham Stuart, G.
Paulmier, Aurélien
Vaultier, Frédéric
Ha, Sun-yong
Min, Jun-oh
Belt Simon, T.
Type II photosensitized oxidation in senescent microalgal cells at different latitudes: Does low under-ice irradiance in polar regions enhance efficiency?
topic_facet Photodynamic effect
Senescent phytoplankton
Latitude
Polar regions
Solar irradiance
description Comparison of Type II photosensitized oxidation of lipids (the photodynamic effect) and photodegradation of chlorophyll (sensitizer photobleaching) in samples of particulate matter collected previously from locations representing a diverse range of latitudes reveals an enhancement of the photooxidation of lipids at the expense of chlorophyll photodegradation in the polar regions. The efficiency of the photodynamic effect appears to be particularly high in sinking particles collected under sea ice and is attributed to the rapid settling of highly aggregated sympagic algae to depths of low light transmission favouring the photodynamic effect at the expense of photobleaching of the sensitizer. Paradoxically, the low efficiency of Type II photosensitized oxidation of lipids observed in temperate and equatorial regions is associated with high solar irradiances in these regions. Type II photosensitized oxidation of lipids in senescent phytoplankton seems thus to be strongly dependent of the intensity of solar irradiance.
format Article in Journal/Newspaper
author Rontani, Jean-françois
Amiraux, Rémi
Smik, Lukas
Wakeham Stuart, G.
Paulmier, Aurélien
Vaultier, Frédéric
Ha, Sun-yong
Min, Jun-oh
Belt Simon, T.
author_facet Rontani, Jean-françois
Amiraux, Rémi
Smik, Lukas
Wakeham Stuart, G.
Paulmier, Aurélien
Vaultier, Frédéric
Ha, Sun-yong
Min, Jun-oh
Belt Simon, T.
author_sort Rontani, Jean-françois
title Type II photosensitized oxidation in senescent microalgal cells at different latitudes: Does low under-ice irradiance in polar regions enhance efficiency?
title_short Type II photosensitized oxidation in senescent microalgal cells at different latitudes: Does low under-ice irradiance in polar regions enhance efficiency?
title_full Type II photosensitized oxidation in senescent microalgal cells at different latitudes: Does low under-ice irradiance in polar regions enhance efficiency?
title_fullStr Type II photosensitized oxidation in senescent microalgal cells at different latitudes: Does low under-ice irradiance in polar regions enhance efficiency?
title_full_unstemmed Type II photosensitized oxidation in senescent microalgal cells at different latitudes: Does low under-ice irradiance in polar regions enhance efficiency?
title_sort type ii photosensitized oxidation in senescent microalgal cells at different latitudes: does low under-ice irradiance in polar regions enhance efficiency?
publisher Elsevier BV
publishDate 2021
url https://archimer.ifremer.fr/doc/00685/79659/82423.pdf
https://doi.org/10.1016/j.scitotenv.2021.146363
https://archimer.ifremer.fr/doc/00685/79659/
genre Sea ice
genre_facet Sea ice
op_source Science Of The Total Environment (0048-9697) (Elsevier BV), 2021-07 , Vol. 779 , P. 146363 (9p.)
op_relation https://archimer.ifremer.fr/doc/00685/79659/82423.pdf
doi:10.1016/j.scitotenv.2021.146363
https://archimer.ifremer.fr/doc/00685/79659/
op_rights info:eu-repo/semantics/openAccess
restricted use
op_doi https://doi.org/10.1016/j.scitotenv.2021.146363
container_title Science of The Total Environment
container_volume 779
container_start_page 146363
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