title: Chemical markers in Origanum vulgare L. from Kumaon Himalayas: a chemosystematic study.
abstract: The essential oils of four wild growing Origanum vulgare L. (family Lamiaceae) collected from different locations in Kumaon region (Uttarakhand, India) were analysed by capillary GC and GC/MS. The comparative results of O. vulgare L. collected from four different regions showed differences in the chemical constituents of the essential oils. The oil of O. vulgare L. collected from Dhoulchina and Champawat (chemotype I) shows p-cymene (6.7-9.8%), γ-terpinene (12.4-14.0%), thymol (29.7-35.1%) and carvacrol (12.4-20.9%) as major constituents while the oil from Kilbury and Rushi village (chemotype II) shows linalool (6.7-9.7%), bornyl acetate (12.6-16.8%), β-caryophyllene (10.5-13.8%) and germacrene D (6.3-11.3%) as the major constituents. These features highlight the chemosystematics of this genus.
authors.affiliation: Department of Chemistry, Kumaon University, Nainital 263 002, Uttarakhand, India. chitrapande1@yahoo.co.in
authors.forename: C
authors.initials: C
authors.lastname: Pande
authors.forename: G
authors.initials: G
authors.lastname: Tewari
authors.forename: S
authors.initials: S
authors.lastname: Singh
authors.forename: C
authors.initials: C
authors.lastname: Singh
mesh_terms: D000080462:Acyclic Monoterpenes; D015415:Biomarkers / Q000032:analysis*; D001892:Camphanes / Q000032:analysis; D002849:Chromatography, Gas; D000081005:Cyclohexane Monoterpenes; D000081007:Cymenes; D008401:Gas Chromatography-Mass Spectrometry; D005843:Geography; D007194:India; D039821:Monoterpenes / Q000032:analysis; D009822:Oils, Volatile / Q000737:chemistry*; D031341:Origanum / Q000737:chemistry*; D000081223:Polycyclic Sesquiterpenes; D012717:Sesquiterpenes / Q000032:analysis; D045788:Sesquiterpenes, Germacrane / Q000032:analysis; D013045:Species Specificity; D013943:Thymol / Q000032:analysis
chemical_list: D000080462:Acyclic Monoterpenes; D015415:Biomarkers; D001892:Camphanes; D000081005:Cyclohexane Monoterpenes; D000081007:Cymenes; D039821:Monoterpenes; D009822:Oils, Volatile; D000081223:Polycyclic Sesquiterpenes; D012717:Sesquiterpenes; D045788:Sesquiterpenes, Germacrane; C007210:4-cymene; C071528:bornyl acetate; D013943:Thymol; C018669:gamma-terpinene; C073316:carvacrol; C024714:caryophyllene; C018584:linalool; C027259:germacrene D