Raman spectroscopic search for scytonemin and gloeocapsin in endolithic colonizations in large gypsum crystals

Rock‐dwelling microorganisms are frequently exposed to intense UV‐radiation, and thus, they synthesize specialized UV‐protective pigments. In this study, Raman microspectrometry was used for analysis of noncarotenoid UV‐protective pigments of dark‐pigmented endolithic colonization found in gypsum outcrops from three areas (Sicily, Poland and Israel). Samples were investigated using 445‐, 532‐ and 780‐nm excitation lasers. Two noncarotenoid...