Seasonal Variation of Chemical Composition and Antioxidant Activity of Essential Oil from <Emphasis Type="Italic">Pistacia atlantica</Emphasis> Desf. Leaves |
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Authors: | Nadhir Gourine Mohamed Yousfi Isabelle Bombarda Boubakeur Nadjemi Emile Gaydou |
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Affiliation: | 1.Laboratoire des Sciences Fondamentales,Université Amar TéLIDJI de Laghouat,Laghouat,Algeria;2.Laboratoire de recherche sur les Produits Bioactifs et la Valorisation de la Biomasse LPBVB,école Normale Supérieure,Algiers,Algeria;3.Laboratoire de Recherche en Systèmes Chimiques Complexes, Faculté des Sciences et Technique de Saint-Jér?me,Université Paul Cézanne,Marseille,France |
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Abstract: | The composition and antioxidant activities of Pistacia atlantica Desf. essential oil were investigated. Qualitative and quantitative differences in compositions and in antioxidant activities
of male and female leaf essential oils were observed during the season. The essential oils obtained by hydrodistillation were
analysed by GC and GC–MS. The oils were rich in monoterpenes hydrocarbons and oxygenated sesquiterpenes. The main components
of male essential oil were α-pinene/α-thujene, spathulenol and bicyclogermacrene. The major component of female essential oil was δ-3-carene. The seasonal variation showed that most of the main components of the oils reached theirs highest values in September.
The antioxidant activity of the oil was investigated in vitro using two assays: DPPH· (2,2-di-phenyl-1-picrylhydrazyl) free radical-scavenging and FRAP (Ferric Reducing Antioxidant Power). The highest antioxidant
capacity to scavenge free DPPH radicals was reached in the month of June for male oils and during the months of September–October
for the female oils. The high reducing power for male oil was observed during the month of June and for the female oil it
was in August. The female oil was more active than the male oil. The antioxidant capacity of the female oil was almost ten
times higher than Ascorbic acid in the FRAP assay. |
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