Cell wall-bound ultraviolet-screening compounds explain the high ultraviolet tolerance of the Antarctic moss, Ceratodon purpureus
• Studies of ultraviolet (UV) light-induced DNA damage in three Antarctic moss species have shown Ceratodon purpureus to be the most UV tolerant, despite containing lower concentrations of methanol-soluble UV-screening compounds than the co-occurring Bryum pseudotriquetrum. • In this study, alkali e...
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2008
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Online Access: | http://hdl.handle.net/2440/68265 https://doi.org/10.1111/j.1469-8137.2008.02499.x |
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/68265 2023-12-17T10:21:17+01:00 Cell wall-bound ultraviolet-screening compounds explain the high ultraviolet tolerance of the Antarctic moss, Ceratodon purpureus Clarke, L. Robinson, S. 2008 http://hdl.handle.net/2440/68265 https://doi.org/10.1111/j.1469-8137.2008.02499.x en eng Blackwell Publishing Ltd New Phytologist, 2008; 179(3):776-783 0028-646X 1469-8137 http://hdl.handle.net/2440/68265 doi:10.1111/j.1469-8137.2008.02499.x © The Authors (2008). Journal compilation © New Phytologist (2008) http://dx.doi.org/10.1111/j.1469-8137.2008.02499.x Antarctic Bryum pseudotriquetrum cell wall Ceratodon purpureus confocal microscopy ozone depletion Schistidium antarctici (Grimmia antarctici) UV-screening compounds Journal article 2008 ftunivadelaidedl https://doi.org/10.1111/j.1469-8137.2008.02499.x 2023-11-20T23:34:54Z • Studies of ultraviolet (UV) light-induced DNA damage in three Antarctic moss species have shown Ceratodon purpureus to be the most UV tolerant, despite containing lower concentrations of methanol-soluble UV-screening compounds than the co-occurring Bryum pseudotriquetrum. • In this study, alkali extraction of cell wall-bound phenolics, combined with methanol extraction of soluble phenolics, was used to determine whether cell wall-bound UV screens explain the greater UV tolerance of C. purpureus. • The combined pool of UV screens was similar in B. pseudotriquetrum and C. purpureus, but whilst B. pseudotriquetrum had almost equal concentrations of MeOH-soluble and alkali-extractable cell wall-bound UV-screening compounds, in C. purpureus the concentration of cell wall-bound screening compounds was six times higher than the concentration of MeOH-soluble UV screens. The Antarctic endemic Schistidium antarctici possessed half the combined pool of UV screens of the other species but, as in C. purpureus, these were predominantly cell wall bound. Confocal microscopy confirmed the localization of UV screens in each species. • Greater investment in cell wall-bound UV screens offers C. purpureus a more spatially uniform, and potentially more effective, UV screen. Schistidium antarctici has the lowest UV-screening potential, indicating that this species may be disadvantaged under continuing springtime ozone depletion. Cell wall compounds have not previously been quantified in bryophytes but may be an important component of the UV defences of lower plants. Laurence J. Clarke and Sharon A. Robinson Article in Journal/Newspaper Antarc* Antarctic Grimmia antarctici Schistidium antarctici The University of Adelaide: Digital Library Antarctic The Antarctic New Phytologist 179 3 776 783 |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
topic |
Antarctic Bryum pseudotriquetrum cell wall Ceratodon purpureus confocal microscopy ozone depletion Schistidium antarctici (Grimmia antarctici) UV-screening compounds |
spellingShingle |
Antarctic Bryum pseudotriquetrum cell wall Ceratodon purpureus confocal microscopy ozone depletion Schistidium antarctici (Grimmia antarctici) UV-screening compounds Clarke, L. Robinson, S. Cell wall-bound ultraviolet-screening compounds explain the high ultraviolet tolerance of the Antarctic moss, Ceratodon purpureus |
topic_facet |
Antarctic Bryum pseudotriquetrum cell wall Ceratodon purpureus confocal microscopy ozone depletion Schistidium antarctici (Grimmia antarctici) UV-screening compounds |
description |
• Studies of ultraviolet (UV) light-induced DNA damage in three Antarctic moss species have shown Ceratodon purpureus to be the most UV tolerant, despite containing lower concentrations of methanol-soluble UV-screening compounds than the co-occurring Bryum pseudotriquetrum. • In this study, alkali extraction of cell wall-bound phenolics, combined with methanol extraction of soluble phenolics, was used to determine whether cell wall-bound UV screens explain the greater UV tolerance of C. purpureus. • The combined pool of UV screens was similar in B. pseudotriquetrum and C. purpureus, but whilst B. pseudotriquetrum had almost equal concentrations of MeOH-soluble and alkali-extractable cell wall-bound UV-screening compounds, in C. purpureus the concentration of cell wall-bound screening compounds was six times higher than the concentration of MeOH-soluble UV screens. The Antarctic endemic Schistidium antarctici possessed half the combined pool of UV screens of the other species but, as in C. purpureus, these were predominantly cell wall bound. Confocal microscopy confirmed the localization of UV screens in each species. • Greater investment in cell wall-bound UV screens offers C. purpureus a more spatially uniform, and potentially more effective, UV screen. Schistidium antarctici has the lowest UV-screening potential, indicating that this species may be disadvantaged under continuing springtime ozone depletion. Cell wall compounds have not previously been quantified in bryophytes but may be an important component of the UV defences of lower plants. Laurence J. Clarke and Sharon A. Robinson |
format |
Article in Journal/Newspaper |
author |
Clarke, L. Robinson, S. |
author_facet |
Clarke, L. Robinson, S. |
author_sort |
Clarke, L. |
title |
Cell wall-bound ultraviolet-screening compounds explain the high ultraviolet tolerance of the Antarctic moss, Ceratodon purpureus |
title_short |
Cell wall-bound ultraviolet-screening compounds explain the high ultraviolet tolerance of the Antarctic moss, Ceratodon purpureus |
title_full |
Cell wall-bound ultraviolet-screening compounds explain the high ultraviolet tolerance of the Antarctic moss, Ceratodon purpureus |
title_fullStr |
Cell wall-bound ultraviolet-screening compounds explain the high ultraviolet tolerance of the Antarctic moss, Ceratodon purpureus |
title_full_unstemmed |
Cell wall-bound ultraviolet-screening compounds explain the high ultraviolet tolerance of the Antarctic moss, Ceratodon purpureus |
title_sort |
cell wall-bound ultraviolet-screening compounds explain the high ultraviolet tolerance of the antarctic moss, ceratodon purpureus |
publisher |
Blackwell Publishing Ltd |
publishDate |
2008 |
url |
http://hdl.handle.net/2440/68265 https://doi.org/10.1111/j.1469-8137.2008.02499.x |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Grimmia antarctici Schistidium antarctici |
genre_facet |
Antarc* Antarctic Grimmia antarctici Schistidium antarctici |
op_source |
http://dx.doi.org/10.1111/j.1469-8137.2008.02499.x |
op_relation |
New Phytologist, 2008; 179(3):776-783 0028-646X 1469-8137 http://hdl.handle.net/2440/68265 doi:10.1111/j.1469-8137.2008.02499.x |
op_rights |
© The Authors (2008). Journal compilation © New Phytologist (2008) |
op_doi |
https://doi.org/10.1111/j.1469-8137.2008.02499.x |
container_title |
New Phytologist |
container_volume |
179 |
container_issue |
3 |
container_start_page |
776 |
op_container_end_page |
783 |
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1785532228783046656 |