Etude des propriétés antioxydantes du poireau sauvage Allium sp : partie verte

Abstract

Wild leek is an allium belonging to the genus Allium. Since antiquity, this plant has been used as vegetable, spice and as a medicinal plant. The purpose of the present work is to quantify the content of the total polyphenols and to evaluate the antioxidant activity of the acetonic extracts (25%) of the green part of Allium sp. The quantification of total phenols was performed by the Folin-Ciocalteu method while the antioxidant activity was evaluated using total antioxidant activity (TAC), reducing ability (FRP), DPPH, chelation (FIC) test, H2O2 trapping and β-carotene bleaching test. The total polyphenol content that has been recorded is of the order of 1636.84  20.482 mg EAG / 100g DM. The green part of the studied plant revealed a total antioxidant activity of the order of 3047.55  75.09 mg EAG / 100g DM and an iron reducing activity of the order of 367.39  10.91 mg EAG / 100 g DM. In addition, the antiradical power and the iron chelating activity of the antioxidants contained in the extracts are 36.2609  0.4135 mg EAG / 100g DM and 100.978  11.741 mg EDTA / 100g DM respectively. While the percentage of hydrogen peroxide inhibitory activity and β-carotene bleaching test are estimated at 80.604  4.82% and 71.250  4.677% respectively