title: Chemotaxonomic importance of the essential-oil composition in two subspecies of Teucrium stocksianum Boiss. from Iran.
abstract: The hydrodistilled essential oils obtained from aerial flowering parts of Teucrium stocksianum ssp. stocksianum (TSS) and T. stocksianum ssp. gabrielae (TSG) from Iran were analyzed by capillary GC and GC/MS. The oil analysis of two subspecies led to the identification of 65 compounds that accounted for 93.3 and 95.1% of the total oil compositions, respectively. Sesquiterpenoids (52.9%) constituted the main compounds in the essential oil of TSS represented mainly by cis-sesquisabinene hydrate (12.0%), followed by epi-β-bisabolol (6.6%), guaiol (5.4%), and β-eudesmol (4.4%), whilst monoterpenoids (61.2%) were found to be the major components of the oil of TSG, represented by α-pinene (23.0%), β-pinene (13.0%), myrcene (6.3%), and sabinene (6.3%). The principal component in both subspecies, TSS and TSG, was α-pinene (22.0 and 23.0%, resp.) and β-pinene (6.5 and 13.0%, resp.). epi-α-Cadinol, myrcene, and sabinene, which were detected as principal compounds of TSG, were characterized in lower amounts (<1.5%) in the oil of TSS. Seven components were identified in the oil of TSS corresponding to 25.9% of total oil, which were totally absent in the oil of TSG, of which cis-sesquisabinene hydrate (12.0%), guaiol (5.4%), and β-eudesmol (4.4%) were in considerable amounts. Taxonomic position of the subspecies is discussed on the basis of phytochemical data.
authors.affiliation: Department of Biology, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, G. C., Evin 1983963113, Tehran, Iran. a-sonboli@sbu.ac.ir
authors.forename: Ali
authors.initials: A
authors.lastname: Sonboli
authors.forename: Mir Babak
authors.initials: MB
authors.lastname: Bahadori
authors.forename: Hossein
authors.initials: H
authors.lastname: Dehghan
authors.forename: Leila
authors.initials: L
authors.lastname: Aarabi
authors.forename: Parisa
authors.initials: P
authors.lastname: Savehdroudi
authors.forename: Mina
authors.initials: M
authors.lastname: Nekuei
authors.forename: Narges
authors.initials: N
authors.lastname: Pournaghi
authors.forename: Foroogh
authors.initials: F
authors.lastname: Mirzania
mesh_terms: D016000:Cluster Analysis; D008401:Gas Chromatography-Mass Spectrometry; D007492:Iran; D009822:Oils, Volatile / Q000737:chemistry* / Q000302:isolation & purification; D010802:Phylogeny; D035261:Plant Components, Aerial / Q000737:chemistry; D031367:Teucrium / Q000737:chemistry* / Q000145:classification
chemical_list: D009822:Oils, Volatile