Accumulation of DNA damage in Antarctic mosses: correlations with ultraviolet-B radiation, temperature and turf water content vary amongst species
The susceptibility of three East Antarctic moss species to UV-B radiation was examined by measuring accumulation of cyclobutane pyrimidine dimers under natural sunlight during the austral summer season of 2002/03. The 2002/03 season was characterised by unusually low springtime ozone depletion and a...
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ftunivwollongong:oai:ro.uow.edu.au:scipapers-1168 2023-05-15T13:38:58+02:00 Accumulation of DNA damage in Antarctic mosses: correlations with ultraviolet-B radiation, temperature and turf water content vary amongst species Turnbull, J. D. Robinson, Sharon A. 2009-02-01T08:00:00Z application/pdf https://ro.uow.edu.au/scipapers/143 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=1168&context=scipapers unknown Research Online https://ro.uow.edu.au/scipapers/143 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=1168&context=scipapers Faculty of Science - Papers (Archive) UV-B ozone hole Antarctica cyclobutane pyrimidine dimers Grimmia antarctici Schistidium antarctici Bryum pseudotriquetrum Ceratodon purpureus Life Sciences Physical Sciences and Mathematics Social and Behavioral Sciences article 2009 ftunivwollongong 2020-02-25T10:48:55Z The susceptibility of three East Antarctic moss species to UV-B radiation was examined by measuring accumulation of cyclobutane pyrimidine dimers under natural sunlight during the austral summer season of 2002/03. The 2002/03 season was characterised by unusually low springtime ozone depletion and as such our results likely underestimate the DNA damage possible in a more typical UV-B radiation season. Despite this all three species accumulated significant DNA photoproducts. We also found a positive association between photoproduct accumulation and incident UV-B radiation in the two cosmopolitan species, Bryum pseudotriquetrum and Ceratodon purpureus, with more DNA damage in samples collected early in the season compared to later in the summer. For B. pseudotriquetrum negative associations were also observed between photoproduct accumulation and both turf water content and the 10 day mean air temperature. Photoproduct accumulation in the endemic species Schistidium antarctici was similarly high across the season and no significant association with environmental variables was found. Our results are consistent with the two cosmopolitan species having somewhat higher UV-B screening capabilities and possibly more efficient mechanisms for repairing DNA damage than the endemic S. antarctici Article in Journal/Newspaper Antarc* Antarctic Antarctica Grimmia antarctici Schistidium antarctici University of Wollongong, Australia: Research Online Antarctic Austral |
institution |
Open Polar |
collection |
University of Wollongong, Australia: Research Online |
op_collection_id |
ftunivwollongong |
language |
unknown |
topic |
UV-B ozone hole Antarctica cyclobutane pyrimidine dimers Grimmia antarctici Schistidium antarctici Bryum pseudotriquetrum Ceratodon purpureus Life Sciences Physical Sciences and Mathematics Social and Behavioral Sciences |
spellingShingle |
UV-B ozone hole Antarctica cyclobutane pyrimidine dimers Grimmia antarctici Schistidium antarctici Bryum pseudotriquetrum Ceratodon purpureus Life Sciences Physical Sciences and Mathematics Social and Behavioral Sciences Turnbull, J. D. Robinson, Sharon A. Accumulation of DNA damage in Antarctic mosses: correlations with ultraviolet-B radiation, temperature and turf water content vary amongst species |
topic_facet |
UV-B ozone hole Antarctica cyclobutane pyrimidine dimers Grimmia antarctici Schistidium antarctici Bryum pseudotriquetrum Ceratodon purpureus Life Sciences Physical Sciences and Mathematics Social and Behavioral Sciences |
description |
The susceptibility of three East Antarctic moss species to UV-B radiation was examined by measuring accumulation of cyclobutane pyrimidine dimers under natural sunlight during the austral summer season of 2002/03. The 2002/03 season was characterised by unusually low springtime ozone depletion and as such our results likely underestimate the DNA damage possible in a more typical UV-B radiation season. Despite this all three species accumulated significant DNA photoproducts. We also found a positive association between photoproduct accumulation and incident UV-B radiation in the two cosmopolitan species, Bryum pseudotriquetrum and Ceratodon purpureus, with more DNA damage in samples collected early in the season compared to later in the summer. For B. pseudotriquetrum negative associations were also observed between photoproduct accumulation and both turf water content and the 10 day mean air temperature. Photoproduct accumulation in the endemic species Schistidium antarctici was similarly high across the season and no significant association with environmental variables was found. Our results are consistent with the two cosmopolitan species having somewhat higher UV-B screening capabilities and possibly more efficient mechanisms for repairing DNA damage than the endemic S. antarctici |
format |
Article in Journal/Newspaper |
author |
Turnbull, J. D. Robinson, Sharon A. |
author_facet |
Turnbull, J. D. Robinson, Sharon A. |
author_sort |
Turnbull, J. D. |
title |
Accumulation of DNA damage in Antarctic mosses: correlations with ultraviolet-B radiation, temperature and turf water content vary amongst species |
title_short |
Accumulation of DNA damage in Antarctic mosses: correlations with ultraviolet-B radiation, temperature and turf water content vary amongst species |
title_full |
Accumulation of DNA damage in Antarctic mosses: correlations with ultraviolet-B radiation, temperature and turf water content vary amongst species |
title_fullStr |
Accumulation of DNA damage in Antarctic mosses: correlations with ultraviolet-B radiation, temperature and turf water content vary amongst species |
title_full_unstemmed |
Accumulation of DNA damage in Antarctic mosses: correlations with ultraviolet-B radiation, temperature and turf water content vary amongst species |
title_sort |
accumulation of dna damage in antarctic mosses: correlations with ultraviolet-b radiation, temperature and turf water content vary amongst species |
publisher |
Research Online |
publishDate |
2009 |
url |
https://ro.uow.edu.au/scipapers/143 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=1168&context=scipapers |
geographic |
Antarctic Austral |
geographic_facet |
Antarctic Austral |
genre |
Antarc* Antarctic Antarctica Grimmia antarctici Schistidium antarctici |
genre_facet |
Antarc* Antarctic Antarctica Grimmia antarctici Schistidium antarctici |
op_source |
Faculty of Science - Papers (Archive) |
op_relation |
https://ro.uow.edu.au/scipapers/143 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=1168&context=scipapers |
_version_ |
1766112965845581824 |