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- Title
Chemical Composition of Thymus vulgaris, Origanum compactum and Vetiveria zizanoides Essential oils and their Antibacterial and Antioxidant Activities.
- Authors
Jeddi, Mohamed; Fikri-Benbrahim, Kawtar; El Hachlafi, Naoufal; Benkhaira, Nesrine; Aboussemdai, Asmae; Ouaritini, Zineb B.
- Abstract
Thanks to their various compounds, essential oils (EOs) are promising innovative resources of antimicrobial and antioxidant agents. This work aims to explore in vitro the antibacterial and antioxidant potential of the volatile oils extracted from three Moroccan species: Thymus vulgaris, Origanum compactum and Vetiveria zizanoides. The phytochemistry of these oils attained by hydro-distillation was investigated via GC-MS analysis. Antioxidant potential was evaluated by DPPH and FRAP assays. The antibacterial effect was assessed on Staphylococcus aureus and Salmonella enterica using broth-microdilution method. Phytochemical analysis allowed to identify 10 components for each EO. Caryophellene (19.93%) and carvacrol (15.35%) were the main identified compounds in O. compactum EO, while T. vulgaris EO was dominated by caryophyllene (17.925%) and thymol (15.127%). As regard V. zizanoides EO, longiverbenone (27.31%) and longipinocarvone (26.87%) were the major compounds. The antibacterial screening demonstrated that these oils exhibited significant inhibitory effects against S. aureus and S. enterica with MIC values varying from 0.25 to 0.5% and 0.5 to 1% (v/v), respectively. These values are close to those of positive control: tetracycline (MIC values = 0.5 and 0.25% (v/v), respectively). The studied EOs presented promising antioxidant effects by IC50 values varied between 93.10 ± 1.3 and 141.5 ± 2.41 μg/mL for DPPH assay, and between 131.79 ± 2.64 and 184.8 ± 1.02 μg/mL for FRAP method. In light of this work, the volatile compounds of the studied plants could constitute a natural source for antibacterial and antioxidant agents. Presented information could shed light into further studies on these plant Eos.
- Subjects
THYMES; ANTIBACTERIAL agents; ESSENTIAL oils; ANTIOXIDANTS; STAPHYLOCOCCUS aureus
- Publication
Tropical Journal of Natural Product Research, 2023, Vol 7, Issue 1, p2244
- ISSN
2616-0684
- Publication type
Article
- DOI
10.26538/tjnpr/v7i1.24