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Abstract
The essential oils chemical composition of twenty samples of Moroccan Myrtus communis L. harvested from the same site was determined by GC and GC/MS. Thirty-one compounds representing an average of 99% of the oils composition were identified. High percentages of oxygenated monoterpenes (48.8–97.2%) and monoterpene hydrocarbons (0.4–50.7%) were observed. Major compounds were α-pinene (0.4–50.3%), 1,8-cineole (8.3–64.9%), myrtenyl acetate (0–61.1%), α-terpinolene (0–20.8%), methyl eugenol (0–33.6%) and α-terminal (0.2-18%). The results of the essential oils chemical composition were submitted to PCA in order to investigate the intra-population variability. In this way, five chemical profiles, including A: 1,8-cineole and myrtenyl acetate, α-pinene; B: α-pinene and 1,8-cineole; C: 1,8-cineole and methyl eugenol; D: myrtenyl acetate; E: 1,8-cineole, α-terpinolene, α-terpineol were detected. Among detected chemical profiles, the chemotype A was the only one which corresponds to Moroccan myrtle, the other four chemotypes were not previously detected in Morocco. Besides, an important inhibitor activity against Gram-positive and Gram-negative bacteria was shown by the detected chemotypes.
Published Version
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