This study was conducted with the objective of contributing to the valorization of aromatic and medicinal plants of Côte d’Ivoire. The essential oil (EO) of the leaves of two species of Premna, P. angolensis and P. quadrifolia obtained through steam distillation process, were analized through gas chromatography coupled with mass spectroscopy (GC-MS) and their antimicrobial activities was evaluated by agar diffusion method. The yields of EO extracted from the leaves of P. angolensis and P. quadrifolia are respectively 0.10 ± 0.02% and 0.40 ± 0.02%. 99.43% of the total chemical composition of the EO of P. angolensis leaves, are composed mainly of hydrocarbon sesquiterpenes (71.90%) followed by oxygenates (14.16%) and monoterpenes (13.22%). The main compounds found are β-caryophyllene (33.07%) and Humulene (10.78%). The EO of P. quadrifofia leaves, 99.59% of the composition was identified. It contains hydrocarbon sesquiterpenes (89.15%), followed by oxygenates compounds (8.61%) and monoterpenes (1.83%). The major compounds are αbulnesene (23.33%), germacrene D (18.83%) and caryophyllene (18.06%). The antimicrobial tests have shown that EO of P. quadrifolia leaves has no activites on studied strains and P. angolensis oil has a mild activity on Staphylococcus epidermidis and Klebsielle pneumoneae and a weak sensibility on Staphylococcus aureus CIP 4.83 and Candida albicans ATCC 10231. This study highlights chemical composition of the EO from P. angolensis and P. quadrifolia leaves. It shows more similarities of the chemical compositions of these two species of Premna and the interesting antimicrobial activity potential of P. angolensis EO
L'huile essentielle de la partie aérienne de Porophyllum ruderale (Jacq.) Cass. (Asterales ; Asteraceae) obtenue par entraînement à la vapeur a été analysée par Chromatographie en Phase Gazeuse couplée à la Spectrométrie de Masse. L'activité antimicrobienne de l'huile essentielle a été évaluée sur des bactéries et champignons de référence du Centre Suisse de Recherches Scientifiques en Côte d'Ivoire. L'huile essentielle est constituée essentiellement de monoterpènes (94,69%), d'hydrocarbures aromatiques (4,39%) et de sesquiterpènes (0,27%). Les composés majoritaires sont βmyrcène (35,52%), γ-terpinène (26,37%), β-pinène (21,65%), limonène (9,26%) et 1-undécène (4,39%). L'huile essentielle a inhibé la plupart des souches testées, Klebsiella pneumoneae, Bacillus subtilus CIP, Staphylococcus auréus, Staphylococcus épidermidis, Candida albicans, Candida tropicalis et Candida glabrata, avec une concentration minimale inhibitrice (CMI) de 3,75mg/ml. Cependant , elles ne possèdent aucun effet sur Salmonella typhimirium SO 66, Eschérichia coli ATCC 25922 et Pseudomonas aéruginosa ATCC 27853. Cette étude a revélé la composition chimique de l'huile essentielle de la partie aérienne de P. ruderale. Elle a en outre montré le bon potentiel antimicrobien de l'huile essentielle.
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