The essential oils of Astragalus gombo collected from two locations in Tunisia were extracted by hydrodistillation and analysed by gas chromatography coupled with mass spectrometry (GC/MS). Results showed that the essential oil composition of plant collected from Sidi Bouzid was more diversified than oil of plant collected from Sbitla. For both locations, the major compound is the phytol with an amount exceeding 31%. The antioxidant activity of the isolated oils, evaluated by DPPH assay, showed that 50% inhibitrice concentrations were 1.4 ± 0.2 mg/ml and 2.8 ± 0.4 mg/ml respectively for Sidi Bouzid and Sbitla locations. The variation in composition and antioxidant activity of oils can be related to the difference of climatic conditions between plant accessions.
H. Teyeb, O. Houta, W. Douki, M. Neffati
Volatile Compounds, GC/MS, Phytol, Antioxidant activit