Comparative evaluation of antioxidant activity of ethanolic extracts from leaves of Olea europaea L. from Eastern Algeria

Introduction/Objective. In recent decades the study of medicinal proprieties of Olea europaea showed an increase interest of medicinal plants and their traditional use, for the treatment of various diseases. Olea europaea L. is an inseparable entity of the Mediterranean people. This plant belongs to family of oleaceae. The objective of this study was to assess the antioxidant activity of the ethanolic extracts of the O.europaea plant from four wild varieties of Batna, Mila, Biskra and Skikda in Eastern Algeria. Materials and methods. The evaluation of the antioxidant activity in vitro of the extracts was carried out by different methods, 1,1-diphenyl-2-picryl-hydrazyl (DPPH) free radical scavenging effect and ferric reducing antioxidant power (FRAP). Results. Quantitative analysis of the ethanolic extracts from the leaves of the plant showed that the Mila extract is richer compared to the other extracts (420.36 mg GAE/g DM), followed by the Batna extract (396.84 mg GAE/g DM), then the Biskra extract (380.69 mg GAE/g DM) and finally the Skikda extract (368.45 mg GAE/g MS). The results of DPPH free radical scavenging have shown that the ethanolic extracts of Batna and Mila have the most potent power among these extracts. Conclusion. The results we have obtained favorably confirm the use of O.europaea in traditional Algerian medicine for the treatment of several diseases