Hypometabolism to survive the long polar night and subsequent successful return to light in the diatom Fragilariopsis cylindrus
Summary Diatoms, the main eukaryotic phytoplankton of the polar marine regions, are essential for the maintenance of food chains specific to Arctic and Antarctic ecosystems, and are experiencing major disturbances under current climate change. As such, it is fundamental to understand the physiologic...
Published in: | New Phytologist |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2023
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/nph.19387 https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.19387 |
id |
crwiley:10.1111/nph.19387 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/nph.19387 2024-09-30T14:25:45+00:00 Hypometabolism to survive the long polar night and subsequent successful return to light in the diatom Fragilariopsis cylindrus Joli, Nathalie Concia, Lorenzo Mocaer, Karel Guterman, Julie Laude, Juliette Guerin, Sebastien Sciandra, Theo Bruyant, Flavienne Ait‐Mohamed, Ouardia Beguin, Marine Forget, Marie‐Helene Bourbousse, Clara Lacour, Thomas Bailleul, Benjamin Nef, Charlotte Savoie, Mireille Tremblay, Jean‐Eric Campbell, Douglas A. Lavaud, Johann Schwab, Yannick Babin, Marcel Bowler, Chris Canada Excellence Research Chairs, Government of Canada Canada First Research Excellence Fund H2020 European Research Council Human Frontier Science Program Natural Sciences and Engineering Research Council of Canada 2023 http://dx.doi.org/10.1111/nph.19387 https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.19387 en eng Wiley http://creativecommons.org/licenses/by/4.0/ New Phytologist volume 241, issue 5, page 2193-2208 ISSN 0028-646X 1469-8137 journal-article 2023 crwiley https://doi.org/10.1111/nph.19387 2024-09-05T05:07:31Z Summary Diatoms, the main eukaryotic phytoplankton of the polar marine regions, are essential for the maintenance of food chains specific to Arctic and Antarctic ecosystems, and are experiencing major disturbances under current climate change. As such, it is fundamental to understand the physiological mechanisms and associated molecular basis of their endurance during the long polar night. Here, using the polar diatom Fragilariopsis cylindrus , we report an integrative analysis combining transcriptomic, microscopic and biochemical approaches to shed light on the strategies used to survive the polar night. We reveal that in prolonged darkness, diatom cells enter a state of quiescence with reduced metabolic and transcriptional activity, during which no cell division occurs. We propose that minimal energy is provided by respiration and degradation of protein, carbohydrate and lipid stores and that homeostasis is maintained by autophagy in prolonged darkness. We also report internal structural changes that manifest the morphological acclimation of cells to darkness, including the appearance of a large vacuole. Our results further show that immediately following a return to light, diatom cells are able to use photoprotective mechanisms and rapidly resume photosynthesis, demonstrating the remarkable robustness of polar diatoms to prolonged darkness at low temperature. Article in Journal/Newspaper Antarc* Antarctic Arctic Climate change Phytoplankton polar night Wiley Online Library Antarctic Arctic New Phytologist 241 5 2193 2208 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Summary Diatoms, the main eukaryotic phytoplankton of the polar marine regions, are essential for the maintenance of food chains specific to Arctic and Antarctic ecosystems, and are experiencing major disturbances under current climate change. As such, it is fundamental to understand the physiological mechanisms and associated molecular basis of their endurance during the long polar night. Here, using the polar diatom Fragilariopsis cylindrus , we report an integrative analysis combining transcriptomic, microscopic and biochemical approaches to shed light on the strategies used to survive the polar night. We reveal that in prolonged darkness, diatom cells enter a state of quiescence with reduced metabolic and transcriptional activity, during which no cell division occurs. We propose that minimal energy is provided by respiration and degradation of protein, carbohydrate and lipid stores and that homeostasis is maintained by autophagy in prolonged darkness. We also report internal structural changes that manifest the morphological acclimation of cells to darkness, including the appearance of a large vacuole. Our results further show that immediately following a return to light, diatom cells are able to use photoprotective mechanisms and rapidly resume photosynthesis, demonstrating the remarkable robustness of polar diatoms to prolonged darkness at low temperature. |
author2 |
Canada Excellence Research Chairs, Government of Canada Canada First Research Excellence Fund H2020 European Research Council Human Frontier Science Program Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Joli, Nathalie Concia, Lorenzo Mocaer, Karel Guterman, Julie Laude, Juliette Guerin, Sebastien Sciandra, Theo Bruyant, Flavienne Ait‐Mohamed, Ouardia Beguin, Marine Forget, Marie‐Helene Bourbousse, Clara Lacour, Thomas Bailleul, Benjamin Nef, Charlotte Savoie, Mireille Tremblay, Jean‐Eric Campbell, Douglas A. Lavaud, Johann Schwab, Yannick Babin, Marcel Bowler, Chris |
spellingShingle |
Joli, Nathalie Concia, Lorenzo Mocaer, Karel Guterman, Julie Laude, Juliette Guerin, Sebastien Sciandra, Theo Bruyant, Flavienne Ait‐Mohamed, Ouardia Beguin, Marine Forget, Marie‐Helene Bourbousse, Clara Lacour, Thomas Bailleul, Benjamin Nef, Charlotte Savoie, Mireille Tremblay, Jean‐Eric Campbell, Douglas A. Lavaud, Johann Schwab, Yannick Babin, Marcel Bowler, Chris Hypometabolism to survive the long polar night and subsequent successful return to light in the diatom Fragilariopsis cylindrus |
author_facet |
Joli, Nathalie Concia, Lorenzo Mocaer, Karel Guterman, Julie Laude, Juliette Guerin, Sebastien Sciandra, Theo Bruyant, Flavienne Ait‐Mohamed, Ouardia Beguin, Marine Forget, Marie‐Helene Bourbousse, Clara Lacour, Thomas Bailleul, Benjamin Nef, Charlotte Savoie, Mireille Tremblay, Jean‐Eric Campbell, Douglas A. Lavaud, Johann Schwab, Yannick Babin, Marcel Bowler, Chris |
author_sort |
Joli, Nathalie |
title |
Hypometabolism to survive the long polar night and subsequent successful return to light in the diatom Fragilariopsis cylindrus |
title_short |
Hypometabolism to survive the long polar night and subsequent successful return to light in the diatom Fragilariopsis cylindrus |
title_full |
Hypometabolism to survive the long polar night and subsequent successful return to light in the diatom Fragilariopsis cylindrus |
title_fullStr |
Hypometabolism to survive the long polar night and subsequent successful return to light in the diatom Fragilariopsis cylindrus |
title_full_unstemmed |
Hypometabolism to survive the long polar night and subsequent successful return to light in the diatom Fragilariopsis cylindrus |
title_sort |
hypometabolism to survive the long polar night and subsequent successful return to light in the diatom fragilariopsis cylindrus |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1111/nph.19387 https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.19387 |
geographic |
Antarctic Arctic |
geographic_facet |
Antarctic Arctic |
genre |
Antarc* Antarctic Arctic Climate change Phytoplankton polar night |
genre_facet |
Antarc* Antarctic Arctic Climate change Phytoplankton polar night |
op_source |
New Phytologist volume 241, issue 5, page 2193-2208 ISSN 0028-646X 1469-8137 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/nph.19387 |
container_title |
New Phytologist |
container_volume |
241 |
container_issue |
5 |
container_start_page |
2193 |
op_container_end_page |
2208 |
_version_ |
1811646369791737856 |