Differences in thermal acclimation of chloroplast functioning in two ecotypes of Valonia utricularis (Chlorophyta)
Chloroplast functioning in two temperature ecotypes of the tropical to warm-temperate green macrophyte Valonia ultricularis was monitored by measuring chlorophyll a fluorescence parameters. One ecotype from the Mediterranean Sea is, with respect to growth and survival, more cold-adapted and euryther...
Published in: | European Journal of Phycology |
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Language: | English |
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2003
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Online Access: | https://hdl.handle.net/11370/b82932d4-7ba4-458e-8d8e-7a72c1540f90 https://research.rug.nl/en/publications/b82932d4-7ba4-458e-8d8e-7a72c1540f90 https://doi.org/10.1080/0967026031000085823 |
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ftunigroningenpu:oai:pure.rug.nl:publications/b82932d4-7ba4-458e-8d8e-7a72c1540f90 2024-09-15T18:25:28+00:00 Differences in thermal acclimation of chloroplast functioning in two ecotypes of Valonia utricularis (Chlorophyta) Eggert, A. van Hasselt, P. R. Breeman, A. M. 2003-05 https://hdl.handle.net/11370/b82932d4-7ba4-458e-8d8e-7a72c1540f90 https://research.rug.nl/en/publications/b82932d4-7ba4-458e-8d8e-7a72c1540f90 https://doi.org/10.1080/0967026031000085823 eng eng https://research.rug.nl/en/publications/b82932d4-7ba4-458e-8d8e-7a72c1540f90 info:eu-repo/semantics/closedAccess Eggert , A , van Hasselt , P R & Breeman , A M 2003 , ' Differences in thermal acclimation of chloroplast functioning in two ecotypes of Valonia utricularis (Chlorophyta) ' , European Journal of Phycology , vol. 38 , no. 2 , pp. 123-131 . https://doi.org/10.1080/0967026031000085823 acclimation adaptation chlorophyll fluorescence temperature Valonia utricularis xanthophyll cycle ALGA LAMINARIA-SACCHARINA PHOTOSYSTEM-II VIOLAXANTHIN DEEPOXIDATION SUBOPTIMAL TEMPERATURE CHILLING SENSITIVITY ELECTRON-TRANSPORT ENERGY-DISSIPATION QUANTUM YIELD LOW-LIGHT article 2003 ftunigroningenpu https://doi.org/10.1080/0967026031000085823 2024-07-10T07:06:13Z Chloroplast functioning in two temperature ecotypes of the tropical to warm-temperate green macrophyte Valonia ultricularis was monitored by measuring chlorophyll a fluorescence parameters. One ecotype from the Mediterranean Sea is, with respect to growth and survival, more cold-adapted and eurythermal than the cold-sensitive and stenothermal ecotype from the Indian Ocean. Short-term temperature responses of the effective quantum yield (PhiPSII) between 5 and 35degreesC and the potential for acclimation of photosystem II to suboptimal growth temperatures (15, 18, 20degreesC) were investigated. When grown at optimal temperature (25degreesC), the two ecotypes did not differ to a great extent in the short-term temperature response of PhiPSII, even though the temperature optimum was lower in the Mediterranean compared with the Indian Ocean isolate (26 vs 33degreesC). In both ecotypes, decreases in PhiPSII were primarily caused by decreases in the efficiency of excitation capture (Fv'/Fm') and by the decreased fraction of open reaction centres (qP). PhiPSII declined in both isolates to 20-30% of the maximum when measured at 5degreesC. However, the ecotypes showed distinct differences in their potential to acclimate to suboptimal growth temperatures. The Indian Ocean ecotype was not capable of cold acclimation and suffered from photoinhibition when grown at 15-20degreesC, even though it was capable of adjusting its pigment composition, i.e. by decreasing light absorption combined with increasing the capacity for zeaxanthin-induced energy dissipation. The Mediterranean ecotype was capable of acclimating its photosynthetic efficiency to temperatures of 15-20degreesC, achieving optimal photosynthetic activity at 18-20degreesC. Changes in Fv'/Fm' were mainly responsible for the acclimation response of PhiPSII. It is suggested that acquisition of cold adaptation and the potential for temperature acclimation in populations of the northeast Atlantic/Mediterranean Sea have enabled V. utricularis, a species with a tropical ... Article in Journal/Newspaper Northeast Atlantic University of Groningen research database European Journal of Phycology 38 2 123 131 |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
acclimation adaptation chlorophyll fluorescence temperature Valonia utricularis xanthophyll cycle ALGA LAMINARIA-SACCHARINA PHOTOSYSTEM-II VIOLAXANTHIN DEEPOXIDATION SUBOPTIMAL TEMPERATURE CHILLING SENSITIVITY ELECTRON-TRANSPORT ENERGY-DISSIPATION QUANTUM YIELD LOW-LIGHT |
spellingShingle |
acclimation adaptation chlorophyll fluorescence temperature Valonia utricularis xanthophyll cycle ALGA LAMINARIA-SACCHARINA PHOTOSYSTEM-II VIOLAXANTHIN DEEPOXIDATION SUBOPTIMAL TEMPERATURE CHILLING SENSITIVITY ELECTRON-TRANSPORT ENERGY-DISSIPATION QUANTUM YIELD LOW-LIGHT Eggert, A. van Hasselt, P. R. Breeman, A. M. Differences in thermal acclimation of chloroplast functioning in two ecotypes of Valonia utricularis (Chlorophyta) |
topic_facet |
acclimation adaptation chlorophyll fluorescence temperature Valonia utricularis xanthophyll cycle ALGA LAMINARIA-SACCHARINA PHOTOSYSTEM-II VIOLAXANTHIN DEEPOXIDATION SUBOPTIMAL TEMPERATURE CHILLING SENSITIVITY ELECTRON-TRANSPORT ENERGY-DISSIPATION QUANTUM YIELD LOW-LIGHT |
description |
Chloroplast functioning in two temperature ecotypes of the tropical to warm-temperate green macrophyte Valonia ultricularis was monitored by measuring chlorophyll a fluorescence parameters. One ecotype from the Mediterranean Sea is, with respect to growth and survival, more cold-adapted and eurythermal than the cold-sensitive and stenothermal ecotype from the Indian Ocean. Short-term temperature responses of the effective quantum yield (PhiPSII) between 5 and 35degreesC and the potential for acclimation of photosystem II to suboptimal growth temperatures (15, 18, 20degreesC) were investigated. When grown at optimal temperature (25degreesC), the two ecotypes did not differ to a great extent in the short-term temperature response of PhiPSII, even though the temperature optimum was lower in the Mediterranean compared with the Indian Ocean isolate (26 vs 33degreesC). In both ecotypes, decreases in PhiPSII were primarily caused by decreases in the efficiency of excitation capture (Fv'/Fm') and by the decreased fraction of open reaction centres (qP). PhiPSII declined in both isolates to 20-30% of the maximum when measured at 5degreesC. However, the ecotypes showed distinct differences in their potential to acclimate to suboptimal growth temperatures. The Indian Ocean ecotype was not capable of cold acclimation and suffered from photoinhibition when grown at 15-20degreesC, even though it was capable of adjusting its pigment composition, i.e. by decreasing light absorption combined with increasing the capacity for zeaxanthin-induced energy dissipation. The Mediterranean ecotype was capable of acclimating its photosynthetic efficiency to temperatures of 15-20degreesC, achieving optimal photosynthetic activity at 18-20degreesC. Changes in Fv'/Fm' were mainly responsible for the acclimation response of PhiPSII. It is suggested that acquisition of cold adaptation and the potential for temperature acclimation in populations of the northeast Atlantic/Mediterranean Sea have enabled V. utricularis, a species with a tropical ... |
format |
Article in Journal/Newspaper |
author |
Eggert, A. van Hasselt, P. R. Breeman, A. M. |
author_facet |
Eggert, A. van Hasselt, P. R. Breeman, A. M. |
author_sort |
Eggert, A. |
title |
Differences in thermal acclimation of chloroplast functioning in two ecotypes of Valonia utricularis (Chlorophyta) |
title_short |
Differences in thermal acclimation of chloroplast functioning in two ecotypes of Valonia utricularis (Chlorophyta) |
title_full |
Differences in thermal acclimation of chloroplast functioning in two ecotypes of Valonia utricularis (Chlorophyta) |
title_fullStr |
Differences in thermal acclimation of chloroplast functioning in two ecotypes of Valonia utricularis (Chlorophyta) |
title_full_unstemmed |
Differences in thermal acclimation of chloroplast functioning in two ecotypes of Valonia utricularis (Chlorophyta) |
title_sort |
differences in thermal acclimation of chloroplast functioning in two ecotypes of valonia utricularis (chlorophyta) |
publishDate |
2003 |
url |
https://hdl.handle.net/11370/b82932d4-7ba4-458e-8d8e-7a72c1540f90 https://research.rug.nl/en/publications/b82932d4-7ba4-458e-8d8e-7a72c1540f90 https://doi.org/10.1080/0967026031000085823 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
Eggert , A , van Hasselt , P R & Breeman , A M 2003 , ' Differences in thermal acclimation of chloroplast functioning in two ecotypes of Valonia utricularis (Chlorophyta) ' , European Journal of Phycology , vol. 38 , no. 2 , pp. 123-131 . https://doi.org/10.1080/0967026031000085823 |
op_relation |
https://research.rug.nl/en/publications/b82932d4-7ba4-458e-8d8e-7a72c1540f90 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1080/0967026031000085823 |
container_title |
European Journal of Phycology |
container_volume |
38 |
container_issue |
2 |
container_start_page |
123 |
op_container_end_page |
131 |
_version_ |
1810465982571872256 |