title: Chemical composition and biological activities of Santiria trimera (Burseraceae) essential oils from Gabon.
abstract: Water-distilled essential oils from leaves and bark of Santiria trimera (Oliv.) Aubrév. (Burseraceae) collected in Gabon were analyzed using capillary GC-FID and GC-MS. The leaf essential oil, which is described for the first time, was dominated by sesquiterpenes (76.5%), among which alpha-humulene (34.6%) and beta-caryophyllene (14.9%) were the major components. The bark essential oil was almost exclusively monoterpenic, with alpha-pinene (51.5%) and alpha-terpineol (16.8%) as main constituents. The antimicrobial activities of both essential oils were tested against eight Gram-positive and three Gram-negative bacteria by using agar disc diffusion and broth microdilution methods; anticandidal effect was also tested on different strains of Candida albica. The Gram-negative bacteria were the less sensitive to the leaf essential oil, which was effective against Bacillus cereus and Enterococcus faecalis. The bark essential oil was more active and, in particular, exhibited significant antimicrobial activity against Proteus mirabilis, which was resistant to the leaf oil. A weak anticandidal effect of both essential oils was observed.
authors.affiliation: Laboratoires de Substances Naturelles et de Synthèses Organométallique (LASNSOM), Université des Sciences et Techniques de Masuku B.P. 943, Franceville, Gabon.
authors.forename: Raphaël
authors.initials: R
authors.lastname: Bikanga
authors.forename: Thomas
authors.initials: T
authors.lastname: Makani
authors.forename: Huguette
authors.initials: H
authors.lastname: Agnaniet
authors.forename: Louis Clément
authors.initials: LC
authors.lastname: Obame
authors.forename: Fatouma Mohamed
authors.initials: FM
authors.lastname: Abdoul-Latif
authors.forename: Jacques
authors.initials: J
authors.lastname: Lebibi
authors.forename: Chantal
authors.initials: C
authors.lastname: Menut
mesh_terms: D029403:Burseraceae / Q000737:chemistry*; D005681:Gabon; D009822:Oils, Volatile / Q000737:chemistry*; D035261:Plant Components, Aerial / Q000737:chemistry; D010938:Plant Oils / Q000737:chemistry*
chemical_list: D009822:Oils, Volatile; D010938:Plant Oils