Desiccation protects Antarctic mosses from ultraviolet-B induced DNA damage
Antarctic mosses live in a frozen desert, and are characterised by the ability to survive desiccation. They can tolerate multiple desiccation-rehydration events over the summer growing season. As a result of recent ozone depletion, such mosses may also be exposed to ultraviolet-B radiation while des...
Main Authors: | , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Research Online
2009
|
Subjects: | |
Online Access: | https://ro.uow.edu.au/scipapers/2999 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=6341&context=scipapers |
id |
ftunivwollongong:oai:ro.uow.edu.au:scipapers-6341 |
---|---|
record_format |
openpolar |
spelling |
ftunivwollongong:oai:ro.uow.edu.au:scipapers-6341 2023-05-15T13:38:58+02:00 Desiccation protects Antarctic mosses from ultraviolet-B induced DNA damage Turnbull, Johanna Robinson, Sharon A Leslie, Simon J 2009-01-01T08:00:00Z application/pdf https://ro.uow.edu.au/scipapers/2999 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=6341&context=scipapers unknown Research Online https://ro.uow.edu.au/scipapers/2999 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=6341&context=scipapers Faculty of Science - Papers (Archive) Desiccation protects Antarctic mosses from ultraviolet induced DNA damage Life Sciences Physical Sciences and Mathematics Social and Behavioral Sciences article 2009 ftunivwollongong 2020-02-25T10:50:17Z Antarctic mosses live in a frozen desert, and are characterised by the ability to survive desiccation. They can tolerate multiple desiccation-rehydration events over the summer growing season. As a result of recent ozone depletion, such mosses may also be exposed to ultraviolet-B radiation while desiccated. The ultraviolet-B susceptibility of Antarctic moss species was examined in a laboratory experiment that tested whether desiccated or hydrated mosses accumulated more DNA damage under enhanced ultraviolet-B radiation. Accumulation of cyclobutane pyrimidine dimers and pyrimidine (64) pyrimidone dimers was measured in moss samples collected from the field and then exposed to ultraviolet-B radiation in either a desiccated or hydrated state. Two cosmopolitan species, Ceratodon purpureus (Hedw.) Brid. and Bryum pseudotriquetrum (Hedw.) Gaertn., B.Mey. and Scherb, were protected from DNA damage when desiccated, with accumulation of cyclobutane pyrimidine dimers reduced by at least 60% relative to hydrated moss. The endemic Schistidium antarctici (Cardot) L.I. Savicz and Smirnova accumulated more DNA damage than the other species and desiccation was not protective in this species. The cosmopolitan species remarkable ability to tolerate high ultraviolet-B exposure, especially in the desiccated state, suggests they may be better able to tolerate continued elevated ultraviolet-B radiation than the endemic species. Article in Journal/Newspaper Antarc* Antarctic Schistidium antarctici University of Wollongong, Australia: Research Online Antarctic Smirnova ENVELOPE(10.633,10.633,-71.717,-71.717) |
institution |
Open Polar |
collection |
University of Wollongong, Australia: Research Online |
op_collection_id |
ftunivwollongong |
language |
unknown |
topic |
Desiccation protects Antarctic mosses from ultraviolet induced DNA damage Life Sciences Physical Sciences and Mathematics Social and Behavioral Sciences |
spellingShingle |
Desiccation protects Antarctic mosses from ultraviolet induced DNA damage Life Sciences Physical Sciences and Mathematics Social and Behavioral Sciences Turnbull, Johanna Robinson, Sharon A Leslie, Simon J Desiccation protects Antarctic mosses from ultraviolet-B induced DNA damage |
topic_facet |
Desiccation protects Antarctic mosses from ultraviolet induced DNA damage Life Sciences Physical Sciences and Mathematics Social and Behavioral Sciences |
description |
Antarctic mosses live in a frozen desert, and are characterised by the ability to survive desiccation. They can tolerate multiple desiccation-rehydration events over the summer growing season. As a result of recent ozone depletion, such mosses may also be exposed to ultraviolet-B radiation while desiccated. The ultraviolet-B susceptibility of Antarctic moss species was examined in a laboratory experiment that tested whether desiccated or hydrated mosses accumulated more DNA damage under enhanced ultraviolet-B radiation. Accumulation of cyclobutane pyrimidine dimers and pyrimidine (64) pyrimidone dimers was measured in moss samples collected from the field and then exposed to ultraviolet-B radiation in either a desiccated or hydrated state. Two cosmopolitan species, Ceratodon purpureus (Hedw.) Brid. and Bryum pseudotriquetrum (Hedw.) Gaertn., B.Mey. and Scherb, were protected from DNA damage when desiccated, with accumulation of cyclobutane pyrimidine dimers reduced by at least 60% relative to hydrated moss. The endemic Schistidium antarctici (Cardot) L.I. Savicz and Smirnova accumulated more DNA damage than the other species and desiccation was not protective in this species. The cosmopolitan species remarkable ability to tolerate high ultraviolet-B exposure, especially in the desiccated state, suggests they may be better able to tolerate continued elevated ultraviolet-B radiation than the endemic species. |
format |
Article in Journal/Newspaper |
author |
Turnbull, Johanna Robinson, Sharon A Leslie, Simon J |
author_facet |
Turnbull, Johanna Robinson, Sharon A Leslie, Simon J |
author_sort |
Turnbull, Johanna |
title |
Desiccation protects Antarctic mosses from ultraviolet-B induced DNA damage |
title_short |
Desiccation protects Antarctic mosses from ultraviolet-B induced DNA damage |
title_full |
Desiccation protects Antarctic mosses from ultraviolet-B induced DNA damage |
title_fullStr |
Desiccation protects Antarctic mosses from ultraviolet-B induced DNA damage |
title_full_unstemmed |
Desiccation protects Antarctic mosses from ultraviolet-B induced DNA damage |
title_sort |
desiccation protects antarctic mosses from ultraviolet-b induced dna damage |
publisher |
Research Online |
publishDate |
2009 |
url |
https://ro.uow.edu.au/scipapers/2999 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=6341&context=scipapers |
long_lat |
ENVELOPE(10.633,10.633,-71.717,-71.717) |
geographic |
Antarctic Smirnova |
geographic_facet |
Antarctic Smirnova |
genre |
Antarc* Antarctic Schistidium antarctici |
genre_facet |
Antarc* Antarctic Schistidium antarctici |
op_source |
Faculty of Science - Papers (Archive) |
op_relation |
https://ro.uow.edu.au/scipapers/2999 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=6341&context=scipapers |
_version_ |
1766112987753480192 |