title: Variability in the essential-oil composition of Sideritis scardica GRISEB. from native Bulgarian populations.
abstract: The essential-oil composition of six native populations of Sideritis scardica from Bulgaria was studied by GC-FID and GC/MS analyses. Altogether, 37 components, representing 73.1 to 79.2% of the total oil content were identified. Among them, α-pinene (4.4-25.1%), β-pinene (2.8-18.0%), oct-1-en-3-ol (2.3-8.0%), phenylacetaldehyde (0.5-9.5%), β-bisabolene (1.3-11.0%), benzyl benzoate (1.1-14.3%), and m-camphorene (1; 0.3-12.4%) were the main compounds. All samples were characterized by low contents of oxygenated mono- and sesquiterpenes (≤1.6 and 2.3%, resp.). Principal component analysis (PCA) and cluster analysis (CA) showed a significant variability in the chemical composition of the studied samples as well as a correlation between the oil profiles and the ecological conditions of the natural habitats of S. scardica.
authors.affiliation: Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 9, 1113 Sofia, Bulgaria. trendaf@orgchm.bas.bg
authors.forename: Antoaneta B
authors.initials: AB
authors.lastname: Trendafilova
authors.forename: Milka N
authors.initials: MN
authors.lastname: Todorova
authors.forename: Ljuba N
authors.initials: LN
authors.lastname: Evstatieva
authors.forename: Daniela V
authors.initials: DV
authors.lastname: Antonova
mesh_terms: D002031:Bulgaria; D016000:Cluster Analysis; D035264:Flowers / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D009822:Oils, Volatile / Q000737:chemistry* / Q000302:isolation & purification; D025341:Principal Component Analysis; D031365:Sideritis / Q000737:chemistry*
chemical_list: D009822:Oils, Volatile