Metabolic recovery of the Antarctic liverwort Cephaloziella varians during spring snowmelt
We measured the responses of pigments and chlorophyll a fluorescence parameters of the Antarctic leafy liverwort Cephaloziella varians to snowmelt during austral spring 2005 at Rothera Point on the western Antarctic Peninsula. Although no changes to the concentrations of UV-B photoprotective pigment...
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ftnerc:oai:nora.nerc.ac.uk:6002 2024-06-09T07:40:04+00:00 Metabolic recovery of the Antarctic liverwort Cephaloziella varians during spring snowmelt Snell, K.R.S. Convey, P. Newsham, K.K. 2007 text http://nora.nerc.ac.uk/id/eprint/6002/ https://nora.nerc.ac.uk/id/eprint/6002/1/Snell_et_al._2007.pdf https://doi.org/10.1007/s00300-007-0269-z en eng Springer https://nora.nerc.ac.uk/id/eprint/6002/1/Snell_et_al._2007.pdf Snell, K.R.S.; Convey, P. orcid:0000-0001-8497-9903 Newsham, K.K. orcid:0000-0002-9108-0936 . 2007 Metabolic recovery of the Antarctic liverwort Cephaloziella varians during spring snowmelt. Polar Biology, 30 (9). 1115-1122. https://doi.org/10.1007/s00300-007-0269-z <https://doi.org/10.1007/s00300-007-0269-z> Botany Ecology and Environment Publication - Article PeerReviewed 2007 ftnerc https://doi.org/10.1007/s00300-007-0269-z 2024-05-15T08:52:26Z We measured the responses of pigments and chlorophyll a fluorescence parameters of the Antarctic leafy liverwort Cephaloziella varians to snowmelt during austral spring 2005 at Rothera Point on the western Antarctic Peninsula. Although no changes to the concentrations of UV-B photoprotective pigments were detected during snowmelt, chlorophyll and carotenoid concentrations and maximum photosystem (PS)II yield (F v /F m) were respectively 88, 60 and 144% higher in the tissues of the liverwort that had recently emerged from snow than in those under a 10 cm depth of snow. A laboratory experiment similarly showed that effective PSII yield increased rapidly within the first 45 min after plants sampled from under snow were removed to an illuminated growth cabinet. The pigmentation and PSII yields of plants during snowmelt were also compared with those of plants in January, during the middle of the growing season at Rothera Point. During snowmelt, plants had lower F v /F m values, chlorophyll a/b ratios and concentrations of UV-B photoprotective pigments and carotenoids than during mid-season, suggesting that although there is some recovery of PSII activity and increases in concentrations of photosynthetic pigments during snowmelt, the metabolism of C. varians is restricted during this period. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Polar Biology Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Antarctic Peninsula Austral Rothera ENVELOPE(-68.130,-68.130,-67.568,-67.568) Rothera Point ENVELOPE(-68.133,-68.133,-67.567,-67.567) Polar Biology 30 9 1115 1122 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Botany Ecology and Environment |
spellingShingle |
Botany Ecology and Environment Snell, K.R.S. Convey, P. Newsham, K.K. Metabolic recovery of the Antarctic liverwort Cephaloziella varians during spring snowmelt |
topic_facet |
Botany Ecology and Environment |
description |
We measured the responses of pigments and chlorophyll a fluorescence parameters of the Antarctic leafy liverwort Cephaloziella varians to snowmelt during austral spring 2005 at Rothera Point on the western Antarctic Peninsula. Although no changes to the concentrations of UV-B photoprotective pigments were detected during snowmelt, chlorophyll and carotenoid concentrations and maximum photosystem (PS)II yield (F v /F m) were respectively 88, 60 and 144% higher in the tissues of the liverwort that had recently emerged from snow than in those under a 10 cm depth of snow. A laboratory experiment similarly showed that effective PSII yield increased rapidly within the first 45 min after plants sampled from under snow were removed to an illuminated growth cabinet. The pigmentation and PSII yields of plants during snowmelt were also compared with those of plants in January, during the middle of the growing season at Rothera Point. During snowmelt, plants had lower F v /F m values, chlorophyll a/b ratios and concentrations of UV-B photoprotective pigments and carotenoids than during mid-season, suggesting that although there is some recovery of PSII activity and increases in concentrations of photosynthetic pigments during snowmelt, the metabolism of C. varians is restricted during this period. |
format |
Article in Journal/Newspaper |
author |
Snell, K.R.S. Convey, P. Newsham, K.K. |
author_facet |
Snell, K.R.S. Convey, P. Newsham, K.K. |
author_sort |
Snell, K.R.S. |
title |
Metabolic recovery of the Antarctic liverwort Cephaloziella varians during spring snowmelt |
title_short |
Metabolic recovery of the Antarctic liverwort Cephaloziella varians during spring snowmelt |
title_full |
Metabolic recovery of the Antarctic liverwort Cephaloziella varians during spring snowmelt |
title_fullStr |
Metabolic recovery of the Antarctic liverwort Cephaloziella varians during spring snowmelt |
title_full_unstemmed |
Metabolic recovery of the Antarctic liverwort Cephaloziella varians during spring snowmelt |
title_sort |
metabolic recovery of the antarctic liverwort cephaloziella varians during spring snowmelt |
publisher |
Springer |
publishDate |
2007 |
url |
http://nora.nerc.ac.uk/id/eprint/6002/ https://nora.nerc.ac.uk/id/eprint/6002/1/Snell_et_al._2007.pdf https://doi.org/10.1007/s00300-007-0269-z |
long_lat |
ENVELOPE(-68.130,-68.130,-67.568,-67.568) ENVELOPE(-68.133,-68.133,-67.567,-67.567) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Austral Rothera Rothera Point |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Austral Rothera Rothera Point |
genre |
Antarc* Antarctic Antarctic Peninsula Polar Biology |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Polar Biology |
op_relation |
https://nora.nerc.ac.uk/id/eprint/6002/1/Snell_et_al._2007.pdf Snell, K.R.S.; Convey, P. orcid:0000-0001-8497-9903 Newsham, K.K. orcid:0000-0002-9108-0936 . 2007 Metabolic recovery of the Antarctic liverwort Cephaloziella varians during spring snowmelt. Polar Biology, 30 (9). 1115-1122. https://doi.org/10.1007/s00300-007-0269-z <https://doi.org/10.1007/s00300-007-0269-z> |
op_doi |
https://doi.org/10.1007/s00300-007-0269-z |
container_title |
Polar Biology |
container_volume |
30 |
container_issue |
9 |
container_start_page |
1115 |
op_container_end_page |
1122 |
_version_ |
1801383571676463104 |