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Effects of elevated ultraviolet radiation on primary metabolites in selected alpine algae and cyanobacteria.
J. Photochem. Photobiol. B-Biol. 149, 149-155 (2015)
Extremophilic green algae and cyanobacteria are the most abundant species in high mountain habitats, where rough climate conditions such as temperature differences, limited water retention and high ultraviolet (UV) radiation are the cause for a restricted biological diversity in favor of a few specialized autotrophic microorganisms. In this study, we investigated four algal species from alpine habitat in a sun simulator for their defense strategies in response to UV-A radiation (315-400nm) up to 13.4W/m(2) and UV-B radiation (280-315nm) up to 2.8W/m(2). Besides changes in pigment composition we discovered that primary polar metabolites like aromatic amino acids, nucleic bases and nucleosides are increasingly produced when the organisms are exposed to elevated UV radiation. Respective compounds were isolated and identified, and in order to quantify them an HPLC-DAD method was developed and validated. Our results show that especially tyrosine and guanosine were found to be generally two to three times upregulated in the UV-B exposed samples compared to the non-treated control.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Alpine Algae ; Cyanobacteria ; Nucleosides ; Primary Metabolites ; Sun Simulator ; Uv-exposure; B Radiation; Antioxidant Defenses; Solar Uv; Adenosine; Communities; Nucleosides; Reveals; Inosine; Stress; Light
ISSN (print) / ISBN
1011-1344
Quellenangaben
Volume: 149,
Pages: 149-155
Publisher
Elsevier
Publishing Place
Lausanne
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Research Unit Environmental Simulation (BIOP-EUS)