Antioxidant activity and phenolic profile of different organs of <i>Pistacia atlantica</i> Desf. subsp. <i>atlantica</i> from Algeria

<p>The present study evaluated the antioxidant activity of 21 extracts prepared from seven parts of <i>Pistacia atlantica</i> Desf. subsp<i>. atlantica</i>. (Fruits, leaves, buds, stems, roots, internal and external trunk barks) collected from Tlemcen, Algeria. Total phenolic, flavonoid and flavonol contents were determined and the antioxidant properties were measured using different assays: 2,2-diphenyl-1-picrylhydrazyl radical (DPPH), ferric antioxidant reducing power and <i>β</i>-carotene bleaching assay. BHA (butylated hydroxyanisole) was used for comparison purposes. The results showed that the extracts of leaves and buds had the highest phenolic contents with 255.789 ± 4.733 and 233.946 ± 6.205 mg GAE/g DM, respectively. For the antioxidant activity, values of EC₅₀ concentrations ranged from 0.059 to 5.712 mg/mL for DPPH, 0.015 to 3.141 mg/mL for reducing power and 0.068 to 5.021 mg/mL for <i>β</i>-carotene method, for all studied extracts. Analysing the phenolic composition, 10 components were identified in different parts of the plant.