Antioxidant activities and polyphenolic contents of three selected micromeria species from croatia

Sanda Vladimir-Kneževic, Biljana Blažekovic, Maja Bival Štefan, Antun Alegro, Tamás Koszegi, József Petrik

Research output: Article

84 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1454-1470
Number of pages17
JournalMolecules
Volume16
Issue number2
DOIs
Publication statusPublished - febr. 2011

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemistry (miscellaneous)
  • Molecular Medicine
  • Pharmaceutical Science
  • Drug Discovery
  • Physical and Theoretical Chemistry
  • Organic Chemistry

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  • Cite this

    Vladimir-Kneževic, S., Blažekovic, B., Štefan, M. B., Alegro, A., Koszegi, T., & Petrik, J. (2011). Antioxidant activities and polyphenolic contents of three selected micromeria species from croatia. Molecules, 16(2), 1454-1470. https://doi.org/10.3390/molecules16021454