Variation in the Composition of Secondary Metabolites in <Emphasis Type="Italic">Flavocetraria</Emphasis> Lichens from Western Siberia |
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| Authors: | I A Prokopiev L N Poryadina L A Konoreva S V Chesnokov A L Shavarda |
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| Institution: | 1.Institute for Biological Problems of the Cryolithozone, Siberian Branch,Russian Academy of Sciences,Yakutsk,Russia;2.Komarov Botanical Institute,Russian Academy of Sciences,St. Petersburg,Russia;3.Research Resource Center for Molecular and Cell Technologies,St. Petersburg State University,St. Petersburg,Russia;4.The Polar-Alpine Botanical Garden and Institution, Kola Science Center,Russian Academy of Science,Murmansk region, Kirovsk,Russia |
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| Abstract: | The composition and contents of secondary metabolites in Flavocetraria lichens from Eastern Siberia were analyzed using herbarium specimens. Based on the composition of identified metabolites, three F. cucullata chemotypes and two F. nivalis chemotypes were distinguished. Distinct geographic differentiation between the F. cucullata chemotypes was revealed, probably reflecting their adaptation to environmental conditions. The content of usnic acid in F. cucullata thalli was found to correlate with the latitude of growing region. This may be regarded as evidence for a protective role of this metabolite in lichens growing at high latitudes and exposed to excess solar irradiation during the polar day. |
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