title: Composition and the in vitro antimicrobial activities of the essential oils of some Thymus species.
abstract: The genus Thymus (Lamiaceae) is represented by 38 species (64 taxa) in Turkey, and 24 of which are endemic to Turkey. Aerial parts of Thymus longicaulis subsp. chaubardii var. chaubardii, T. zygioides var. lycaonicus, T. longicaulis subsp. longicaulis var. subisophyllus and T. pulvinatus collected from three different localities in Balikesir province were subjected to hydrodistillation to yield essential oils which were subsequently analysed by GC and GC/MS. The main constituents of the oils were identified, and antimicrobial bioassay was applied. Thymol (56.6%, 42.8%, 36.9%) was the main component in the oils of T. longicaulis subsp. chaubardii var. chaubardii (chemotype I), T. longicaulis subsp. chaubardii var. chaubardii (chemotype II) and T. zygioides var. lycaonicus respectively. The oil of T. longicaulis subsp. longicaulis var. subisophyllus contained carvacrol (60.0%) and the oil of T. pulvinatus borneol (27.9%) as main constituents.
authors.affiliation: Faculty of Science and Letters, Department of Biology, Balikesir University, 10100 Balikesir, Turkey. azaz@balikesir.edu.tr
authors.forename: Ayse Dilek
authors.initials: AD
authors.lastname: Azaz
authors.forename: Huseyin Alper
authors.initials: HA
authors.lastname: Irtem
authors.forename: Mine
authors.initials: M
authors.lastname: Kurkcuoğlu
authors.forename: Kemal Husnu Can
authors.initials: KH
authors.lastname: Baser
mesh_terms: D000890:Anti-Infective Agents / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D002176:Candida albicans / Q000187:drug effects; D002849:Chromatography, Gas; D021902:Enterobacter aerogenes / Q000187:drug effects; D004926:Escherichia coli / Q000187:drug effects; D008401:Gas Chromatography-Mass Spectrometry; D008826:Microbial Sensitivity Tests; D009822:Oils, Volatile / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D035261:Plant Components, Aerial / Q000737:chemistry; D011514:Proteus vulgaris / Q000187:drug effects; D011550:Pseudomonas aeruginosa / Q000187:drug effects; D013211:Staphylococcus aureus / Q000187:drug effects; D046930:Thymus Plant / Q000737:chemistry*
chemical_list: D000890:Anti-Infective Agents; D009822:Oils, Volatile