Ultraviolet B screening potential is higher in two cosmopolitan moss species than in a co‐occurring Antarctic endemic moss: implications of continuing ozone depletion
Abstract Concentrations of UVB (ultraviolet B) absorbing pigments and anthocyanins were measured in three moss species, over a summer growing season in Antarctica. Pigment concentrations were compared with a range of climatic variables to determine if there was evidence that pigments were induced by...
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crwiley:10.1111/j.1365-2486.2006.01283.x 2024-06-02T07:57:29+00:00 Ultraviolet B screening potential is higher in two cosmopolitan moss species than in a co‐occurring Antarctic endemic moss: implications of continuing ozone depletion DUNN, JODIE L. ROBINSON, SHARON A. 2006 http://dx.doi.org/10.1111/j.1365-2486.2006.01283.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2486.2006.01283.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2486.2006.01283.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 12, issue 12, page 2282-2296 ISSN 1354-1013 1365-2486 journal-article 2006 crwiley https://doi.org/10.1111/j.1365-2486.2006.01283.x 2024-05-03T11:48:22Z Abstract Concentrations of UVB (ultraviolet B) absorbing pigments and anthocyanins were measured in three moss species, over a summer growing season in Antarctica. Pigment concentrations were compared with a range of climatic variables to determine if there was evidence that pigments were induced by UVB radiation, or other environmental parameters, and secondly if there were differences between species in their pigment responses. Significant seasonal differences in the potential UVB screening pigments were found, with the two cosmopolitan species Bryum pseudotriquetrum and Ceratodon purpureus appearing better protected from the potentially damaging effects of ozone depletion than the Antarctic endemic Schistidium antarctici . B. pseudotriquetrum accumulated the highest concentration of UVB screening pigments and showed positive associations between UVB radiation and both UVB absorbing and anthocyanin pigments. The negative associations between water availability measures and UVB absorbing and anthocyanin pigments also suggest that B. pseudotriquetrum is well protected in the desiccated state. This could offer B. pseudotriquetrum an advantage over the other species when high UVB radiation coincides with low temperatures and low water availability, thus limiting physiological activity and consequently, active photoprotective and repair mechanisms. As these pigments could act as either direct UVB screens or antioxidants, the results suggest that B. pseudotriquetrum is best equipped to deal with the negative effects of increased exposure to UVB radiation due to ozone depletion. The most exposed species, C. purpureus , has intermediate and stable concentrations of UVB absorbing pigments suggesting it may rely on constitutive UVB screens. Anthocyanin pigments were more responsive in this species and could offer increased antioxidant protection during periods of high UVB radiation. S. antarctici appears poorly protected and showed no evidence of any UV photoprotective response, providing additional evidence that this ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Schistidium antarctici Wiley Online Library Antarctic The Antarctic Global Change Biology 12 12 2282 2296 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Concentrations of UVB (ultraviolet B) absorbing pigments and anthocyanins were measured in three moss species, over a summer growing season in Antarctica. Pigment concentrations were compared with a range of climatic variables to determine if there was evidence that pigments were induced by UVB radiation, or other environmental parameters, and secondly if there were differences between species in their pigment responses. Significant seasonal differences in the potential UVB screening pigments were found, with the two cosmopolitan species Bryum pseudotriquetrum and Ceratodon purpureus appearing better protected from the potentially damaging effects of ozone depletion than the Antarctic endemic Schistidium antarctici . B. pseudotriquetrum accumulated the highest concentration of UVB screening pigments and showed positive associations between UVB radiation and both UVB absorbing and anthocyanin pigments. The negative associations between water availability measures and UVB absorbing and anthocyanin pigments also suggest that B. pseudotriquetrum is well protected in the desiccated state. This could offer B. pseudotriquetrum an advantage over the other species when high UVB radiation coincides with low temperatures and low water availability, thus limiting physiological activity and consequently, active photoprotective and repair mechanisms. As these pigments could act as either direct UVB screens or antioxidants, the results suggest that B. pseudotriquetrum is best equipped to deal with the negative effects of increased exposure to UVB radiation due to ozone depletion. The most exposed species, C. purpureus , has intermediate and stable concentrations of UVB absorbing pigments suggesting it may rely on constitutive UVB screens. Anthocyanin pigments were more responsive in this species and could offer increased antioxidant protection during periods of high UVB radiation. S. antarctici appears poorly protected and showed no evidence of any UV photoprotective response, providing additional evidence that this ... |
format |
Article in Journal/Newspaper |
author |
DUNN, JODIE L. ROBINSON, SHARON A. |
spellingShingle |
DUNN, JODIE L. ROBINSON, SHARON A. Ultraviolet B screening potential is higher in two cosmopolitan moss species than in a co‐occurring Antarctic endemic moss: implications of continuing ozone depletion |
author_facet |
DUNN, JODIE L. ROBINSON, SHARON A. |
author_sort |
DUNN, JODIE L. |
title |
Ultraviolet B screening potential is higher in two cosmopolitan moss species than in a co‐occurring Antarctic endemic moss: implications of continuing ozone depletion |
title_short |
Ultraviolet B screening potential is higher in two cosmopolitan moss species than in a co‐occurring Antarctic endemic moss: implications of continuing ozone depletion |
title_full |
Ultraviolet B screening potential is higher in two cosmopolitan moss species than in a co‐occurring Antarctic endemic moss: implications of continuing ozone depletion |
title_fullStr |
Ultraviolet B screening potential is higher in two cosmopolitan moss species than in a co‐occurring Antarctic endemic moss: implications of continuing ozone depletion |
title_full_unstemmed |
Ultraviolet B screening potential is higher in two cosmopolitan moss species than in a co‐occurring Antarctic endemic moss: implications of continuing ozone depletion |
title_sort |
ultraviolet b screening potential is higher in two cosmopolitan moss species than in a co‐occurring antarctic endemic moss: implications of continuing ozone depletion |
publisher |
Wiley |
publishDate |
2006 |
url |
http://dx.doi.org/10.1111/j.1365-2486.2006.01283.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2486.2006.01283.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2486.2006.01283.x |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Schistidium antarctici |
genre_facet |
Antarc* Antarctic Antarctica Schistidium antarctici |
op_source |
Global Change Biology volume 12, issue 12, page 2282-2296 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2486.2006.01283.x |
container_title |
Global Change Biology |
container_volume |
12 |
container_issue |
12 |
container_start_page |
2282 |
op_container_end_page |
2296 |
_version_ |
1800740644529897472 |