Response of the sea‐ice diatom Fragilariopsis cylindrusto simulated polar night darkness and return to light
Abstract Arctic photoautotrophic communities must survive through polar night darkness until light returns in spring. We tracked changes in the cellular resource allocations and functional capacities of a polar sea‐ice diatom, Fragilariopsis cylindrus , to understand acclimation processes in both da...
Published in: | Limnology and Oceanography |
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Online Access: | http://dx.doi.org/10.1002/lno.11368 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.11368 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11368 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11368 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11368 |
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crwiley:10.1002/lno.11368 2024-09-15T18:31:17+00:00 Response of the sea‐ice diatom Fragilariopsis cylindrusto simulated polar night darkness and return to light Morin, Philippe‐Israël Lacour, Thomas Grondin, Pierre‐Luc Bruyant, Flavienne Ferland, Joannie Forget, Marie‐Hélène Massicotte, Philippe Donaher, Natalie Campbell, Douglas A. Lavaud, Johann Babin, Marcel Canada Research Chairs Fonds de recherche du Québec – Nature et technologies Natural Sciences and Engineering Research Council of Canada New Brunswick Innovation Foundation 2019 http://dx.doi.org/10.1002/lno.11368 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.11368 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11368 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11368 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11368 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 65, issue 5, page 1041-1060 ISSN 0024-3590 1939-5590 journal-article 2019 crwiley https://doi.org/10.1002/lno.11368 2024-09-05T05:07:11Z Abstract Arctic photoautotrophic communities must survive through polar night darkness until light returns in spring. We tracked changes in the cellular resource allocations and functional capacities of a polar sea‐ice diatom, Fragilariopsis cylindrus , to understand acclimation processes in both darkness and during the subsequent return to light. We measured parameters at specific time‐points over 3 months of darkness, and then over 6 d after a return to light. Measured parameters included cell number and size, cellular carbon and nitrogen quotas, lipid and pigment contents, concentration of key proteins of the photosynthetic system, photosynthetic parameters based on both variable fluorescence and carbon assimilation, and the level of nonphotochemical quenching. A stable functional state was reached within a few days after the transition to dark and was then maintained throughout 3 months of darkness. The dark period resulted in a decrease of lipid droplet cell quota (−6%), chlorophyll a cell quota (−41%) and the maximum carbon fixation rate per cell (−98%). Return to light after 1.5 months of darkness resulted in a strong induction of nonphotochemical quenching of excitation and a fast recovery of the maximum carbon fixation rate within 1 d, followed by a rapid increase in the cell number. Return to light after 3 months of darkness showed an increase of mortality or a profound downregulation induced over longer periods of darkness. Article in Journal/Newspaper polar night Sea ice Wiley Online Library Limnology and Oceanography 65 5 1041 1060 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Arctic photoautotrophic communities must survive through polar night darkness until light returns in spring. We tracked changes in the cellular resource allocations and functional capacities of a polar sea‐ice diatom, Fragilariopsis cylindrus , to understand acclimation processes in both darkness and during the subsequent return to light. We measured parameters at specific time‐points over 3 months of darkness, and then over 6 d after a return to light. Measured parameters included cell number and size, cellular carbon and nitrogen quotas, lipid and pigment contents, concentration of key proteins of the photosynthetic system, photosynthetic parameters based on both variable fluorescence and carbon assimilation, and the level of nonphotochemical quenching. A stable functional state was reached within a few days after the transition to dark and was then maintained throughout 3 months of darkness. The dark period resulted in a decrease of lipid droplet cell quota (−6%), chlorophyll a cell quota (−41%) and the maximum carbon fixation rate per cell (−98%). Return to light after 1.5 months of darkness resulted in a strong induction of nonphotochemical quenching of excitation and a fast recovery of the maximum carbon fixation rate within 1 d, followed by a rapid increase in the cell number. Return to light after 3 months of darkness showed an increase of mortality or a profound downregulation induced over longer periods of darkness. |
author2 |
Canada Research Chairs Fonds de recherche du Québec – Nature et technologies Natural Sciences and Engineering Research Council of Canada New Brunswick Innovation Foundation |
format |
Article in Journal/Newspaper |
author |
Morin, Philippe‐Israël Lacour, Thomas Grondin, Pierre‐Luc Bruyant, Flavienne Ferland, Joannie Forget, Marie‐Hélène Massicotte, Philippe Donaher, Natalie Campbell, Douglas A. Lavaud, Johann Babin, Marcel |
spellingShingle |
Morin, Philippe‐Israël Lacour, Thomas Grondin, Pierre‐Luc Bruyant, Flavienne Ferland, Joannie Forget, Marie‐Hélène Massicotte, Philippe Donaher, Natalie Campbell, Douglas A. Lavaud, Johann Babin, Marcel Response of the sea‐ice diatom Fragilariopsis cylindrusto simulated polar night darkness and return to light |
author_facet |
Morin, Philippe‐Israël Lacour, Thomas Grondin, Pierre‐Luc Bruyant, Flavienne Ferland, Joannie Forget, Marie‐Hélène Massicotte, Philippe Donaher, Natalie Campbell, Douglas A. Lavaud, Johann Babin, Marcel |
author_sort |
Morin, Philippe‐Israël |
title |
Response of the sea‐ice diatom Fragilariopsis cylindrusto simulated polar night darkness and return to light |
title_short |
Response of the sea‐ice diatom Fragilariopsis cylindrusto simulated polar night darkness and return to light |
title_full |
Response of the sea‐ice diatom Fragilariopsis cylindrusto simulated polar night darkness and return to light |
title_fullStr |
Response of the sea‐ice diatom Fragilariopsis cylindrusto simulated polar night darkness and return to light |
title_full_unstemmed |
Response of the sea‐ice diatom Fragilariopsis cylindrusto simulated polar night darkness and return to light |
title_sort |
response of the sea‐ice diatom fragilariopsis cylindrusto simulated polar night darkness and return to light |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1002/lno.11368 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.11368 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11368 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11368 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11368 |
genre |
polar night Sea ice |
genre_facet |
polar night Sea ice |
op_source |
Limnology and Oceanography volume 65, issue 5, page 1041-1060 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/lno.11368 |
container_title |
Limnology and Oceanography |
container_volume |
65 |
container_issue |
5 |
container_start_page |
1041 |
op_container_end_page |
1060 |
_version_ |
1810472917359656960 |