Biology
Scientific paper
Apr 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004ijasb...3..125e&link_type=abstract
International Journal of Astrobiology, vol. 3, Issue 02, p.125-129
Biology
2
Carotenoids, Glacier Extremophile, Raman Spectroscopy, Senescence, Snow Algae.
Scientific paper
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.
Cockell Charles S.
Cynan Ellis-Evans J.
de Oliveira Luiz F. C.
Edwards Howell G. M.
Wynn-Williams David D.
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