Phytoplankton selenium requirements: the case for species isolated from temperate and polar regions of the Southern Hemisphere
A series of laboratory culture experiments was used to investigate the effect of selenium (Se, 0–10 nM) on the growth, cellular volume, photophysiology, and pigments of two temperate and four polar oceanic phytoplankton species [coccolithophore Emiliania huxleyi (Lohmann) W. W. Hay et H. P. Mohler,...
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ftunivgeneve:oai:unige.ch:unige:25842 2023-05-15T13:48:35+02:00 Phytoplankton selenium requirements: the case for species isolated from temperate and polar regions of the Southern Hemisphere Wake, Bronwyn D. Hassler, Christel Bowie, Andrew R. Haddad, Paul R. Butler, Edward C. V. 2012 https://archive-ouverte.unige.ch/unige:25842 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1529-8817.2012.01153.x unige:25842 https://archive-ouverte.unige.ch/unige:25842 info:eu-repo/semantics/restrictedAccess ISSN: 0022-3646 Journal of phycology, Vol. 48, No 3 (2012) pp. 585-594 Antarctic diatom Emiliania huxleyi marine micronutrient Phaeocystis photosynthesis phytoplankton selenium Text Article scientifique info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2012 ftunivgeneve https://doi.org/10.1111/j.1529-8817.2012.01153.x 2022-06-19T23:38:45Z A series of laboratory culture experiments was used to investigate the effect of selenium (Se, 0–10 nM) on the growth, cellular volume, photophysiology, and pigments of two temperate and four polar oceanic phytoplankton species [coccolithophore Emiliania huxleyi (Lohmann) W. W. Hay et H. P. Mohler, cyanobacterium Synechococcus sp., prymnesiophyte Phaeocystis sp., and three diatoms—Fragilariopsis cylindrus (Grunow) Kriegar, Chaetoceros sp., and Thalassiosira antarctica G. Karst.]. Only Synechoccocus sp. and Phaeocystis sp. did not show any requirement for Se. Under Se-deficient conditions, the growth rate of E. huxleyi was decreased by 1.6-fold, whereas cellular volume was increased by 1.9-fold. Se limitation also decreased chl a (2.5-fold), maximum relative electron transport rate (1.9-fold), and saturating light intensity (2.8-fold), suggesting that Se plays a role in photosynthesis or high-light acclimation. Pigment analysis for Antarctic taxa provided an interesting counterpoint to the physiology of E. huxleyi. For all Se-dependent Antarctic diatoms, Se limitation decreased growth rate and chl a content, whereas cellular volume was not affected. Pigment analysis revealed that other pigments were affected under Se deficiency. Photoprotective pigments increased by 1.4-fold, while diadinoxanthin:diatoxanthin ratios decreased by 1.5- to 4.9-fold under Se limitation, supporting a role for Se in photoprotection. Our results demonstrate an Se growth requirement for polar diatoms and indicate that Se could play a role in the biogeochemical cycles of other nutrients, such as silicic acid in the Southern Ocean. Se measurements made during the austral summer in the Southern Ocean and Se biological requirement were used to discuss possible Se limitation in phytoplankton from contrasting oceanographic regions. Article in Journal/Newspaper Antarc* Antarctic Antarctica Southern Ocean Université de Genève: Archive ouverte UNIGE Antarctic Austral Southern Ocean Journal of Phycology 48 3 585 594 |
institution |
Open Polar |
collection |
Université de Genève: Archive ouverte UNIGE |
op_collection_id |
ftunivgeneve |
language |
English |
topic |
Antarctic diatom Emiliania huxleyi marine micronutrient Phaeocystis photosynthesis phytoplankton selenium |
spellingShingle |
Antarctic diatom Emiliania huxleyi marine micronutrient Phaeocystis photosynthesis phytoplankton selenium Wake, Bronwyn D. Hassler, Christel Bowie, Andrew R. Haddad, Paul R. Butler, Edward C. V. Phytoplankton selenium requirements: the case for species isolated from temperate and polar regions of the Southern Hemisphere |
topic_facet |
Antarctic diatom Emiliania huxleyi marine micronutrient Phaeocystis photosynthesis phytoplankton selenium |
description |
A series of laboratory culture experiments was used to investigate the effect of selenium (Se, 0–10 nM) on the growth, cellular volume, photophysiology, and pigments of two temperate and four polar oceanic phytoplankton species [coccolithophore Emiliania huxleyi (Lohmann) W. W. Hay et H. P. Mohler, cyanobacterium Synechococcus sp., prymnesiophyte Phaeocystis sp., and three diatoms—Fragilariopsis cylindrus (Grunow) Kriegar, Chaetoceros sp., and Thalassiosira antarctica G. Karst.]. Only Synechoccocus sp. and Phaeocystis sp. did not show any requirement for Se. Under Se-deficient conditions, the growth rate of E. huxleyi was decreased by 1.6-fold, whereas cellular volume was increased by 1.9-fold. Se limitation also decreased chl a (2.5-fold), maximum relative electron transport rate (1.9-fold), and saturating light intensity (2.8-fold), suggesting that Se plays a role in photosynthesis or high-light acclimation. Pigment analysis for Antarctic taxa provided an interesting counterpoint to the physiology of E. huxleyi. For all Se-dependent Antarctic diatoms, Se limitation decreased growth rate and chl a content, whereas cellular volume was not affected. Pigment analysis revealed that other pigments were affected under Se deficiency. Photoprotective pigments increased by 1.4-fold, while diadinoxanthin:diatoxanthin ratios decreased by 1.5- to 4.9-fold under Se limitation, supporting a role for Se in photoprotection. Our results demonstrate an Se growth requirement for polar diatoms and indicate that Se could play a role in the biogeochemical cycles of other nutrients, such as silicic acid in the Southern Ocean. Se measurements made during the austral summer in the Southern Ocean and Se biological requirement were used to discuss possible Se limitation in phytoplankton from contrasting oceanographic regions. |
format |
Article in Journal/Newspaper |
author |
Wake, Bronwyn D. Hassler, Christel Bowie, Andrew R. Haddad, Paul R. Butler, Edward C. V. |
author_facet |
Wake, Bronwyn D. Hassler, Christel Bowie, Andrew R. Haddad, Paul R. Butler, Edward C. V. |
author_sort |
Wake, Bronwyn D. |
title |
Phytoplankton selenium requirements: the case for species isolated from temperate and polar regions of the Southern Hemisphere |
title_short |
Phytoplankton selenium requirements: the case for species isolated from temperate and polar regions of the Southern Hemisphere |
title_full |
Phytoplankton selenium requirements: the case for species isolated from temperate and polar regions of the Southern Hemisphere |
title_fullStr |
Phytoplankton selenium requirements: the case for species isolated from temperate and polar regions of the Southern Hemisphere |
title_full_unstemmed |
Phytoplankton selenium requirements: the case for species isolated from temperate and polar regions of the Southern Hemisphere |
title_sort |
phytoplankton selenium requirements: the case for species isolated from temperate and polar regions of the southern hemisphere |
publishDate |
2012 |
url |
https://archive-ouverte.unige.ch/unige:25842 |
geographic |
Antarctic Austral Southern Ocean |
geographic_facet |
Antarctic Austral Southern Ocean |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_source |
ISSN: 0022-3646 Journal of phycology, Vol. 48, No 3 (2012) pp. 585-594 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1529-8817.2012.01153.x unige:25842 https://archive-ouverte.unige.ch/unige:25842 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1111/j.1529-8817.2012.01153.x |
container_title |
Journal of Phycology |
container_volume |
48 |
container_issue |
3 |
container_start_page |
585 |
op_container_end_page |
594 |
_version_ |
1766249461310291968 |