Caracterización de la composición fenólica de uvas y vinos de la variedad Malbec (Vitis vinifera L.): su relación con el origen geográfico, factores vitivinícolas y valor comercial

Identifier:  TDX:1068

Handle: https://hdl.handle.net/20.500.11797/TDX1068

Authors:  Fanzone Sánchez, Martín Leandro

Abstract:
Malbec (Vitis vinifera L.) is a wine grape variety considered to be the emblematic red cultivar of Argentina, but despite its economic and cultural importance there is a lack of knowledge about its chemical composition. The aim of this study was to characterize the phenolic composition of grapes and wines of this variety compared to other cultivars, geographical origin, some viticultural and winemaking practices, and its commercial value. Among the most relevant results, were observed qualitative and quantitative differences in global phenolic parameters and the profile of flavonoids and non-flavonoids in grapes and wines compared to other varieties, it was confirmed the influence of geographical zone and season in combination with the practices of cluster thinning and partial juice runoff prior to fermentation, and it found a greater phenolic and polysaccharidic richness in premium wines. Additionally, dihydroflavonols represented a taxonomic distinctive feature of this variety.