title: Variation in the volatile constituents of Artemisia annua var. CIM-Arogya during plant ontogeny.
abstract: The essential oils yield and composition of the aerial parts of A. annua var. CIM-Arogya grown in Uttarakhand, India were analyzed and compared by capillary GC and GC-MS at different stages of development. The analysis led to the identification of 81 constituents forming 91.0%-97.1% of the essential oils compositions. The essential oil content of the aerial parts was found to vary from 0.3% to 0.7% at different stages of growth. A. annua crop harvested at full flowering and seed setting stage gave higher yield of essential oil (0.6%, 0.7%) than that harvested at pre flowering (0.5%), late vegetative (0.4%, 0.5%), mid vegetative (0.4%, 0.4%) and early vegetative stages (0.3%, 0.3%). The essential oils at different stages of growth showed monoterpenoids (38.5%-72.0%) and sesquiterpenoids (22.2%-48.2%) as major grouped constituents. The major constituents identified were camphor (22.8%-42.6%), 1,8-cineole (3.7%-8.4%), linalool (<0.1%-11.9%), beta-caryophyllene (2.0%-9.2%), (E)-beta-farnesene (1.3%-8.5%), germacrene D (0.5%-7.3%) and 1-epi-cubenol (0.7%-5.2%) in essential oil samples collected at different crop stages.
authors.affiliation: Central Institute of Medicinal and Aromatic Plants (CIMAP, CSIR), Research Center, Pantnagar - 263 149, Uttarakhand, India. padaliarc@rediffmail.com
authors.forename: Rajendra C
authors.initials: RC
authors.lastname: Padalia
authors.forename: Ram S
authors.initials: RS
authors.lastname: Verma
authors.forename: Amit
authors.initials: A
authors.lastname: Chauhan
authors.forename: Chandan S
authors.initials: CS
authors.lastname: Chanotiya
authors.forename: Anju
authors.initials: A
authors.lastname: Yadav
mesh_terms: D000080462:Acyclic Monoterpenes; D031172:Artemisia annua / Q000737:chemistry* / Q000254:growth & development; D002164:Camphor / Q000032:analysis; D003511:Cyclohexanols / Q000032:analysis; D000077591:Eucalyptol; D008401:Gas Chromatography-Mass Spectrometry; D039821:Monoterpenes / Q000032:analysis; D009822:Oils, Volatile / Q000032:analysis*; D000081223:Polycyclic Sesquiterpenes; D012717:Sesquiterpenes / Q000032:analysis; D045788:Sesquiterpenes, Germacrane / Q000032:analysis
chemical_list: D000080462:Acyclic Monoterpenes; D003511:Cyclohexanols; D039821:Monoterpenes; D009822:Oils, Volatile; D000081223:Polycyclic Sesquiterpenes; D012717:Sesquiterpenes; D045788:Sesquiterpenes, Germacrane; D002164:Camphor; C024714:caryophyllene; C018584:linalool; D000077591:Eucalyptol; C027259:germacrene D