Edwards, Howell G.M.; Cockell, Charles S.; Newton, Emma M. and Wynn-Williams, David D.
|DOI (Digital Object Identifier) Link:||http://doi.org/10.1002/jrs.1172|
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FT-Raman spectra were obtained for two Antarctic extremophiles, the epilithic lichens Xanthoria elegans and Caloplaca sublobulata from the maritime ecological long-term research site on Leonie Island. Twelve specimens from cloches designed for the filtering out and transmission of UVB radiation over a 2 year period and two specimens from the natural habitat outside the cloches were analysed in terms of their characteristic Raman bands from the two photoprotective pigments parietin and -carotene. Following chemometric analysis, the specimens inside the UVB-protective cloches exhibited a lower parietin:-carotene ratio than specimens from the same habitat that did not have UVB protection. The relative roles of parietin, a passive UVB photoprotectant, and -carotene are discussed and a possible duality of biological function is suggested for these pigments.
|Item Type:||Journal Article|
|Extra Information:||Some of the symbols may not have transferred correctly into this bibliographic record.|
|Keywords:||UV radiation stress; Antarctic lichens; Mars analogues; radiation stress; photoprotective pigments|
|Academic Unit/Department:||Science > Physical Sciences
|Interdisciplinary Research Centre:||Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)|
|Depositing User:||Users 6044 not found.|
|Date Deposited:||03 Aug 2006|
|Last Modified:||14 Jan 2016 16:12|
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