Antioxidant properties of lichen extracts

The antioxidant properties of acetonic, methanolic, and ethanolic extracts from the lichens Cladonia furcata , Cladonia rangiferina , Evernia mesomorpha , Hypogymnia tubulosa , and Parmelia sulcata were studied. The methods used were total flavonoids content determination, PFRAP, phosphomolybdenum assay, CUPRAC, DPPH, β-carotene bleaching assay, and lipid peroxidation by the thiocyanate method. Most of the analyzed extracts showed weak and moderate antioxidant activity. For methanolic and ethanolic extracts from H. tubulosa and P. sulcata , a high activity with respect to linoleic acid radicals generated in the analytical system was found.