The Antioxidant Activity of Wild-Growing Plants Containing Phenolic Compounds in Latvia
Renāte Teterovska | Inga Sile | Artūrs Paulausks | Liga Kovalcuka | Rudīte Koka | Baiba Mauriņa | Dace Bandere
Ethnobotanical reports from Latvia show that <i>Tanacetum vulgare</i>, <i>Calluna vulgaris</i>, <i>Quercus robur</i>, <i>Artemisa absinthium</i>, and <i>Artemisia vulgaris</i> contain phenolic compounds that have antioxidant properties, which can be beneficial in the treatment and prophylaxis of many diseases. The aim of this study was to characterize the phenolic compounds and antioxidant properties of these plants. Plant extracts were prepared using ethanol or acetone and then freeze-dried. Their total phenolic content (TPC), total flavonoid content (TFC), and total tannin content (TTC) were determined and characterized by HPLC. Their antioxidant properties were determined using a DPPH (2,2-diphenyl-1-picrylhydrazyl) radical scavenging assay. <i>C. vulgaris</i> herb and <i>T. vulgare</i> leaf extracts contained the highest amounts of flavonoids, but the bark of <i>Q. robur</i> had mostly tannins and phenolic acids. <i>A. absinthium</i> and <i>A. vulgaris</i> had the lowest amounts of polyphenols. When compared using extraction solvents, all acetone extracts had more TPC, more TFC, and better antioxidant activity. All plants contained chlorogenic acid, which contributes to antioxidant properties. The analysed plant extracts could be used in future studies to develop medicinal products with antioxidant properties.
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