The interacting effect of prolonged darkness and temperature on photophysiological characteristics of three Antarctic phytoplankton species
Photophysiological characteristics of the Southern Ocean phytoplankton species Phaeocystis antarctica, Geminigera cryophila, and Chaetoceros simplex were assessed during 7 weeks of darkness and subsequent recovery after darkness at 4 and 7°C. Chlorophyll a fluorescence and maximum quantum efficiency...
Published in: | Journal of Phycology |
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2023
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Online Access: | https://hdl.handle.net/11370/336db9f5-3c10-415c-9ef6-6444375e4228 https://research.rug.nl/en/publications/336db9f5-3c10-415c-9ef6-6444375e4228 https://doi.org/10.1111/jpy.13374 https://pure.rug.nl/ws/files/829632836/Journal_of_Phycology_-_2023_-_Poll_-_The_interacting_effect_of_prolonged_darkness_and_temperature_on_photophysiological.pdf |
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ftunigroningenpu:oai:pure.rug.nl:publications/336db9f5-3c10-415c-9ef6-6444375e4228 2024-09-15T17:41:09+00:00 The interacting effect of prolonged darkness and temperature on photophysiological characteristics of three Antarctic phytoplankton species van de Poll, Willem Abi Nassif, Thalia 2023-10 application/pdf https://hdl.handle.net/11370/336db9f5-3c10-415c-9ef6-6444375e4228 https://research.rug.nl/en/publications/336db9f5-3c10-415c-9ef6-6444375e4228 https://doi.org/10.1111/jpy.13374 https://pure.rug.nl/ws/files/829632836/Journal_of_Phycology_-_2023_-_Poll_-_The_interacting_effect_of_prolonged_darkness_and_temperature_on_photophysiological.pdf eng eng https://research.rug.nl/en/publications/336db9f5-3c10-415c-9ef6-6444375e4228 info:eu-repo/semantics/openAccess van de Poll , W & Abi Nassif , T 2023 , ' The interacting effect of prolonged darkness and temperature on photophysiological characteristics of three Antarctic phytoplankton species ' , Journal of Phycology , vol. 59 , no. 5 , pp. 1053-1063 . https://doi.org/10.1111/jpy.13374 article 2023 ftunigroningenpu https://doi.org/10.1111/jpy.13374 2024-06-24T16:39:33Z Photophysiological characteristics of the Southern Ocean phytoplankton species Phaeocystis antarctica, Geminigera cryophila, and Chaetoceros simplex were assessed during 7 weeks of darkness and subsequent recovery after darkness at 4 and 7°C. Chlorophyll a fluorescence and maximum quantum efficiency of PSII decreased during long darkness in a species-specific manner, whereas chlorophyll a concentration remained mostly unchanged. Phaeocystis antarctica showed the strongest decline in photosynthetic fitness during darkness, which coincided with a reduced capacity to recover after darkness, suggesting a loss of functional photosystem II (PSII) reaction centers. The diatom C. simplex at 4°C showed the strongest capacity to resume photosynthesis and active growth during 7 weeks of darkness. In all species, the maintenance of photosynthetic fitness during darkness was clearly temperature dependent as shown by the stronger decline of photosynthetic fitness at 7°C compared to 4°C. Although we lack direct evidence for this, we suggest that temperature-enhanced respiration rates cause stronger depletion of energy reserves that subsequently interferes with the maintenance of photosynthetic fitness during long darkness. Therefore, the current low temperatures in the coastal Southern Ocean may aid the maintenance of photosynthetic fitness during the austral winter. Further experiments should examine to what extent the species-specific differences in dark survival are relevant for future temperature scenarios for the coastal Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic Antarctica Southern Ocean University of Groningen research database Journal of Phycology 59 5 1053 1063 |
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Open Polar |
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University of Groningen research database |
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ftunigroningenpu |
language |
English |
description |
Photophysiological characteristics of the Southern Ocean phytoplankton species Phaeocystis antarctica, Geminigera cryophila, and Chaetoceros simplex were assessed during 7 weeks of darkness and subsequent recovery after darkness at 4 and 7°C. Chlorophyll a fluorescence and maximum quantum efficiency of PSII decreased during long darkness in a species-specific manner, whereas chlorophyll a concentration remained mostly unchanged. Phaeocystis antarctica showed the strongest decline in photosynthetic fitness during darkness, which coincided with a reduced capacity to recover after darkness, suggesting a loss of functional photosystem II (PSII) reaction centers. The diatom C. simplex at 4°C showed the strongest capacity to resume photosynthesis and active growth during 7 weeks of darkness. In all species, the maintenance of photosynthetic fitness during darkness was clearly temperature dependent as shown by the stronger decline of photosynthetic fitness at 7°C compared to 4°C. Although we lack direct evidence for this, we suggest that temperature-enhanced respiration rates cause stronger depletion of energy reserves that subsequently interferes with the maintenance of photosynthetic fitness during long darkness. Therefore, the current low temperatures in the coastal Southern Ocean may aid the maintenance of photosynthetic fitness during the austral winter. Further experiments should examine to what extent the species-specific differences in dark survival are relevant for future temperature scenarios for the coastal Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
van de Poll, Willem Abi Nassif, Thalia |
spellingShingle |
van de Poll, Willem Abi Nassif, Thalia The interacting effect of prolonged darkness and temperature on photophysiological characteristics of three Antarctic phytoplankton species |
author_facet |
van de Poll, Willem Abi Nassif, Thalia |
author_sort |
van de Poll, Willem |
title |
The interacting effect of prolonged darkness and temperature on photophysiological characteristics of three Antarctic phytoplankton species |
title_short |
The interacting effect of prolonged darkness and temperature on photophysiological characteristics of three Antarctic phytoplankton species |
title_full |
The interacting effect of prolonged darkness and temperature on photophysiological characteristics of three Antarctic phytoplankton species |
title_fullStr |
The interacting effect of prolonged darkness and temperature on photophysiological characteristics of three Antarctic phytoplankton species |
title_full_unstemmed |
The interacting effect of prolonged darkness and temperature on photophysiological characteristics of three Antarctic phytoplankton species |
title_sort |
interacting effect of prolonged darkness and temperature on photophysiological characteristics of three antarctic phytoplankton species |
publishDate |
2023 |
url |
https://hdl.handle.net/11370/336db9f5-3c10-415c-9ef6-6444375e4228 https://research.rug.nl/en/publications/336db9f5-3c10-415c-9ef6-6444375e4228 https://doi.org/10.1111/jpy.13374 https://pure.rug.nl/ws/files/829632836/Journal_of_Phycology_-_2023_-_Poll_-_The_interacting_effect_of_prolonged_darkness_and_temperature_on_photophysiological.pdf |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_source |
van de Poll , W & Abi Nassif , T 2023 , ' The interacting effect of prolonged darkness and temperature on photophysiological characteristics of three Antarctic phytoplankton species ' , Journal of Phycology , vol. 59 , no. 5 , pp. 1053-1063 . https://doi.org/10.1111/jpy.13374 |
op_relation |
https://research.rug.nl/en/publications/336db9f5-3c10-415c-9ef6-6444375e4228 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/jpy.13374 |
container_title |
Journal of Phycology |
container_volume |
59 |
container_issue |
5 |
container_start_page |
1053 |
op_container_end_page |
1063 |
_version_ |
1810487272138604544 |