Abstract: Antioxidant activities of three selected Micromeria species growing in Croatia (M. croatica, M. juliana and M. thymifolia) were evaluated using five different antioxidant assays, in comparison with plant polyphenolic constituents and reference antioxidants. All studied ethanolic extracts exhibited considerable activity to scavenge DPPH and hydroxyl free radicals, reducing power, iron chelating ability and total antioxidant capacity in the order: M. croatica > M. juliana > M. thymifolia. Total polyphenol (9.69–13.66%), phenolic acid (5.26–6.84%), flavonoid (0.01–0.09%) and tannin (3.07–6.48%) contents in dried plant samples were determined spectrophotometrically. A strong positive correlation between antioxidant activities and contents of phenolic acids and tannins was found, indicating their responsibility for effectiveness of tested plants. Our findings established Micromeria species as a rich source of antioxidant polyphenols, especially the endemic M. croatica.
This is an open access article distributed under the
Creative Commons Attribution License which permits unrestricted use, distribution,
and reproduction in any medium, provided the original work is properly cited.
Export to BibTeX
MDPI and ACS Style
Vladimir-Knežević, S.; Blažeković, B.; Bival Štefan, M.; Alegro, A.; Kőszegi, T.; Petrik, J. Antioxidant Activities and Polyphenolic Contents of Three Selected Micromeria Species from Croatia. Molecules 2011, 16, 1454-1470.
Vladimir-Knežević S, Blažeković B, Bival Štefan M, Alegro A, Kőszegi T, Petrik J. Antioxidant Activities and Polyphenolic Contents of Three Selected Micromeria Species from Croatia. Molecules. 2011; 16(2):1454-1470.
Vladimir-Knežević, Sanda; Blažeković, Biljana; Bival Štefan, Maja; Alegro, Antun; Kőszegi, Tamás; Petrik, József. 2011. "Antioxidant Activities and Polyphenolic Contents of Three Selected Micromeria Species from Croatia." Molecules 16, no. 2: 1454-1470.