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Chemical composition and antibacterial activity of leaves essential oil of Laurus nobilis from Morocco.

2009; International Network for Scientific Information Publication; Volume: 3; Issue: 4 Linguagem: Inglês

2309-8414

Elhoussine Derwich, Z. Benziane, Abdellatif Boukir,

Ethnobotanical and Medicinal Plants Studies

The extraction of essential oils of leaves of Laurus nobilis is obtained by hydrodistillation and analyzed by gas chromatography coupled with mass spectrometry (GC/MS) and gas chromatography with flame ionization detection (GC-FID) for determining their chemical composition and identification of their chemotypes. Their antibacterial activity was studied in vitro on tree bacterial strains: Staphylococcus aureus, Staphylococcus intermedius and Klebsiella pneumonia. The essential oil yields of the studies were 1.86%. The major component was 1,8-cineole (52.43%), other predominant components were a-terpinyl acetate (8.96%), sabinene (6.13%), Limonene (5.25%), a- pinene (3.72%), linalool (3.14%), terpinene-4-ol (2.56%), a-terpinene (2.12%), â-pinene (1.98%), a- terpineol (1.56%), bornyl acetate (1.89%), a-phellandrene (1.28%), myrcene (1.13%), camphene (1.05%), p-cymene (0.94%), o-terpinene (0.98%) and eugenol (0.56%). The chemical compositions revealed that this leaves had compositions similar to those of other Laurus nobilis essential oils analyzed in other countries. The bacterial strains tested were found to be sensitive to essential oils studied and showed a very effective bactericidal activity with minimum inhibitory concentrations (M IC) ranging from 0.01 to 1 mg/ ml.