Abstract
The elemental composition and atomic mass ratios (%) on the surface of vegetative and generative parts of crustose Caloplaca cerina and foliose Xanthoria parietina lichen thalli collected from the same tree trunk were measured using micro-x-ray fluorescence spectrometry. The atomic mass fractions for half of the elements (of 21 identified) were significantly higher on the surfaces of fruiting bodies (apothecia) than on vegetative parts of thalli of both species. The atomic mass fractions of most elements were much greater on the surfaces of fruiting bodies and vegetative parts of the foliose species than on the crustose species.
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