Screening Phytochimique et évaluation des propriétés antioxydante d’une plante connue et médicinale de la Flore d'Algérie

Abstract

This work consists of a phytochemical study of the leaves and stems of the Teucrium polium plant. The aim of this study is to determine the chemical composition of Teucrium polium leaf extracts and stem essential oils used in traditional medicine, and to compare two extraction methods: Soxhlet maceration and two essential oil extraction methods: simple hydrodistillation and clevenger. Antioxidant activity was assessed for leaf extracts using two methods: DPPH and ABTS. The study showed that the anti-oxidant activity of butanol extracts was higher than that of dichlomethane and ethyl acetate extracts of Teucrium polium leaves. Polyphenol and flavonoid assays were also carried out to confirm antioxidant activity. In fact, the polyphenol content was higher than in butanolic extract (351.83 mg EQ AG/g extract ±138.14) (242.89mg EQ AG/g extract±139.32) and flavonoids (142.833mg EQ AG/g extract±72.023) (24.6515 mg EQ AG/g extract ±64.0418) respectively. The amount of sugars found in the ethyl acetate extract of Teucrium polium is low compared to that found in the dichlomethane and butanolic extracts. The yield of essential oil from the Teucrium polium plant is higher for the clvenger method than for the hydrodistillatio method