title: Aroma composition of Vitis vinifera Cv. tannat: the typical red wine from Uruguay.
abstract: The free volatiles, as well as those released from the glycosidically bound forms by enzyme hydrolysis, have been analyzed to chracterize young Tannat wines from two successive vintages. The Tannat wine showed some aroma profile peculiarities detected in the free forms but, above all, in the bound fraction for the level and profile of the norisoprenoidic fraction. Among the free volatile compunds, a rather low content of C(6) alcohols with a prevalence of cis-3-hexen-1-ol on the trans form and sometimes a remarkable level of trans-2-hexen-1-ol seem to be typical for the variety. C(13)-norisoprenoidic and monoterpenic volatiles made up approximately 42% of the total level of the volatiles observed in the glycosidase enzyme-released fraction. The other volatiles were C(6) alcohols (6%) and benzenoid compounds (51%). The dominating monoterpene alcohols were the cis and trans isomers of 3,7-dimethyl-1,6-octadiene-3,8-diol (8-hydroxylinalool). The C(13)-norisoprenoid pattern was composed by 3-hydroxy-beta-damascone, 3-oxo-alpha-ionol, vomifoliol, 4-oxo-beta-ionol, 3-oxo-7,8-dihydro-alpha-ionol, 4-oxo-7,8-dihydro-beta-ionol, grasshopper ketone, and 7,8-dihydrovomifoliol.
authors.affiliation: Sección Enología and Cátedra de Farmacognosia y Productos Naturales, Facultad de Química, Universidad de la República, Avenida General Flores 2124, 11800 Montevideo, Uruguay.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Boido
authors.forename: Adriana
authors.initials: A
authors.lastname: Lloret
authors.forename: Karina
authors.initials: K
authors.lastname: Medina
authors.forename: Laura
authors.initials: L
authors.lastname: Fariña
authors.forename: Francisco
authors.initials: F
authors.lastname: Carrau
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Versini
authors.forename: Eduardo
authors.initials: E
authors.lastname: Dellacassa
mesh_terms: D002849:Chromatography, Gas; D005638:Fruit / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D006027:Glycosides / Q000032:analysis; D039821:Monoterpenes / Q000032:analysis; D009812:Odorants / Q000032:analysis*; D012765:Shikimic Acid / Q000031:analogs & derivatives; D014583:Uruguay; D027843:Vitis / Q000737:chemistry; D014835:Volatilization; D014920:Wine / Q000032:analysis*
chemical_list: D006027:Glycosides; D039821:Monoterpenes; D012765:Shikimic Acid