Raman spectroscopy of senescing snow algae: pigmentation changes in an Antarctic cold desert extremophile
The FT-Raman spectra are described of green and red snow algae, Chlamydomona , involved in the colonization of exposed surfaces of the McLeod Glacier, Jane Col, Signy Island, situated at the northern edge of the Weddell Sea, Antarctica. The protective biochemicals produced by these extremophilic alg...
Published in: | International Journal of Astrobiology |
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Language: | English |
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Cambridge University Press (CUP)
2004
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Online Access: | http://dx.doi.org/10.1017/s1473550404002034 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1473550404002034 |
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crcambridgeupr:10.1017/s1473550404002034 2024-09-15T17:42:18+00:00 Raman spectroscopy of senescing snow algae: pigmentation changes in an Antarctic cold desert extremophile Edwards, Howell G.M. de Oliveira, Luiz F.C. Cockell, Charles S. Ellis-Evans, J. Cynan Wynn-Williams, David D. 2004 http://dx.doi.org/10.1017/s1473550404002034 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1473550404002034 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms International Journal of Astrobiology volume 3, issue 2, page 125-129 ISSN 1473-5504 1475-3006 journal-article 2004 crcambridgeupr https://doi.org/10.1017/s1473550404002034 2024-07-31T04:03:35Z The FT-Raman spectra are described of green and red snow algae, Chlamydomona , involved in the colonization of exposed surfaces of the McLeod Glacier, Jane Col, Signy Island, situated at the northern edge of the Weddell Sea, Antarctica. The protective biochemicals produced by these extremophilic algae give rise to the so-called watermelon snow of Alpine regions. The red colour of the senescent algae is shown to derive from the accumulation of carotenoids and a deficiency of chlorophyll believed to arise from UV-radiation induced breakdown into phaecophytin. A comparison of the Raman spectra of young (green) and old (red) algae is effected and possible bio-markers for spectral detection on extraterrestrial icy moons and planets are identified. Article in Journal/Newspaper Antarc* Antarctic Antarctica Signy Island Weddell Sea Cambridge University Press International Journal of Astrobiology 3 2 125 129 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
The FT-Raman spectra are described of green and red snow algae, Chlamydomona , involved in the colonization of exposed surfaces of the McLeod Glacier, Jane Col, Signy Island, situated at the northern edge of the Weddell Sea, Antarctica. The protective biochemicals produced by these extremophilic algae give rise to the so-called watermelon snow of Alpine regions. The red colour of the senescent algae is shown to derive from the accumulation of carotenoids and a deficiency of chlorophyll believed to arise from UV-radiation induced breakdown into phaecophytin. A comparison of the Raman spectra of young (green) and old (red) algae is effected and possible bio-markers for spectral detection on extraterrestrial icy moons and planets are identified. |
format |
Article in Journal/Newspaper |
author |
Edwards, Howell G.M. de Oliveira, Luiz F.C. Cockell, Charles S. Ellis-Evans, J. Cynan Wynn-Williams, David D. |
spellingShingle |
Edwards, Howell G.M. de Oliveira, Luiz F.C. Cockell, Charles S. Ellis-Evans, J. Cynan Wynn-Williams, David D. Raman spectroscopy of senescing snow algae: pigmentation changes in an Antarctic cold desert extremophile |
author_facet |
Edwards, Howell G.M. de Oliveira, Luiz F.C. Cockell, Charles S. Ellis-Evans, J. Cynan Wynn-Williams, David D. |
author_sort |
Edwards, Howell G.M. |
title |
Raman spectroscopy of senescing snow algae: pigmentation changes in an Antarctic cold desert extremophile |
title_short |
Raman spectroscopy of senescing snow algae: pigmentation changes in an Antarctic cold desert extremophile |
title_full |
Raman spectroscopy of senescing snow algae: pigmentation changes in an Antarctic cold desert extremophile |
title_fullStr |
Raman spectroscopy of senescing snow algae: pigmentation changes in an Antarctic cold desert extremophile |
title_full_unstemmed |
Raman spectroscopy of senescing snow algae: pigmentation changes in an Antarctic cold desert extremophile |
title_sort |
raman spectroscopy of senescing snow algae: pigmentation changes in an antarctic cold desert extremophile |
publisher |
Cambridge University Press (CUP) |
publishDate |
2004 |
url |
http://dx.doi.org/10.1017/s1473550404002034 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1473550404002034 |
genre |
Antarc* Antarctic Antarctica Signy Island Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Signy Island Weddell Sea |
op_source |
International Journal of Astrobiology volume 3, issue 2, page 125-129 ISSN 1473-5504 1475-3006 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s1473550404002034 |
container_title |
International Journal of Astrobiology |
container_volume |
3 |
container_issue |
2 |
container_start_page |
125 |
op_container_end_page |
129 |
_version_ |
1810488816338731008 |