Abstract
The component composition of mycotoxin complexes is characterized in foliose lichens of the genera Nephroma, Peltigera, Umbilicaria, and Xanthoria. The interspecies differences in the genus Peltigera are expressed by the number of metabolites detected, from seven in P. aphthosa to three in P. canina, P. didactyla, P. praetextata, and P. rufescens. In Nephroma arcticum eight mycotoxins occurred regularly, with mycophenolic acid in especially high quantities in comparison with other lichens. In Umbilicaria, of six permanent components the content of alternariole is the highest, and in Xanthoria the content of emodine is the highest. Variation of the quantitative content of mycotoxins in general and of species of lichens is discussed, as is expansion of the background spectrum of these metabolites in collections from different territories.
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