Abstract
The composition of the essential oil from Algerian Teucrium polium geyrii (Labiatae) plant was analysed by gas chromatography–mass spectrometry (GC-MS); 85 constituents (87.72% of the total oil) were identified. The main compounds were (11.18%) dl-Limonene, (10.02%) δ-cadinene and (9.15%) trans β-caryophyllene. The antimicrobial activity of the essential oil was evaluated against Staphylococcus aureus ATCC 27923, Escherichia coliATCC 25922, Pseudomonas aeruginosa ATCC 25853 and Candida albicans using disc diffusion method. The oil showed an efficient fungicidal activity against C. albicans. The antioxidant activity was determined by the 2,2-diphenyl-1-picrylhydrazyl (DPPHE™) and ferric reducing antioxidant power (FRAP) assays. The oil of T. polium geyrii plant exhibited noticeable scavenging effects in DPPH free radical scavenging and FRAP assays. Key words: Teucrium polium geyrii, essential oil, labiatae, antimicrobial activity.
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