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Crithmum maritimum L., a species original from France and cultivated in Tunisia arid zones. In this study, we interested to the chemical composition and biological activities of essential oils from different parts of Crithmum maritimum L., . Theses oils were isolated by hydrodistillation and analyzed by GC and GC-MS. The antioxidant activity was evaluated by ABTS tests and the antibacterial activity was tested using the diffusion method. Yellow oils were obtained with yields ranging between 0.28 % and 3.60 %. Our results showed that essential oils of different plant parts were mainly composed by dillapiole (2.39 to 41.35 %), thymyl methyl ether (20.13 to 34.75 %), p-cymene (4.83 to 22.08 %) and γ-terpinene (22.54 to 43.29 %). Evaluation of antioxidant activity showed that the oils of flowers exhibited the most important antioxidant potential oils of flowers, leaves, seeds were the most active against Pseudomonas aeruginosa, Bacillus subtilis, and Staphylococcus epidermidis, respectively. The essen...

The essential oils extracted by Clavenger apparatus from leaves of Rosmarinus officinalis cultivated in different areas in Djerba (Island in the southern of Tunisia) were evaluated for their chemical composition (GC and GC-MS methods), antioxidant (DPPH method) and antibacterial activities (agar-well diffusion method). GC-MS analysis revealed the presence of three chemotypes of oils: 1,8-cineole, 1,8-cineole/camphor/α-pinene/camphene and 1,8-cineole/camphor/α-pinene/ verbenone/borneol which was not previously detected in Tunisian Rosmarinus officinalis. The three chemtypes exhibited moderate antioxidant activity with an IC50 ranged from 4.186 mg/ml for chemotype I to 7.298 for chemotype II and showed strong to moderate antibacterial activity against the six bacterial strains tested with a MIC ranged from 0.156 to 1.25 mg/mL (Chemotype I and chemotype II) and from 1.25 to 5 mg/mL (chemotype III). This study showed that the essential oil extracted from Rosmarinus officinalis cultivated in Djerba ha...