Open AccessBioactive compounds of red grapes from Dão region (Portugal): Evaluation of phenolic and organic profile
Author(s) -
Luís Silva,
Mafalda Queiroz
Publication year - 2016
Publication title -
asian pacific journal of tropical biomedicine/asian pacific journal of tropical biomedicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 61
eISSN - 2588-9222
pISSN - 2221-1691
DOI - 10.1016/j.apjtb.2015.12.015
Subject(s) - flavonols , cultivar , hydroxybenzoic acid , chemistry , phenolic acid , composition (language) , hydroxycinnamic acid , food science , organic acid , phenols , botany , organic chemistry , flavonoid , biology , antioxidant , linguistics , philosophy
ObjectiveTo improve the knowledge on the metabolite profile of five red grapes from Dão region (Portugal), concerning to the phenolic characteristics (coloured and non-coloured phenolics) and organic acid composition.MethodsFive red grapes collected from Dão region were studied. The profiles of phenolic compounds and organic acids were estimated by high-performance liquid chromatography with diode-array detection and high-performance liquid chromatography with UV detector, respectively.ResultsTotally 24 phenolic compounds were identified, and distributed by several classes: 8 anthocyanins, 1 hydroxybenzoic acid, 4 hydroxycinnamic acids, 1 stilbene, 4 flavan-3-ols, 6 flavonols. Additionally, 10 organic acids were detected in all samples. Total contents of each phenolic class and organic acids amounts varied significantly among the different grape cultivars investigated. The principal components analysis differentiates the Touriga Nacional from the other varieties due to their high contents in anthocyanins, non-coloured phenolics and organic acids. Touriga Nacional is an important red grape cultivar, highly esteemed in Dão region for its ability to produce high quality wines.ConclusionsThe results suggest that the red grapes from Dão region present a good composition in bioactive compounds, being important for the production of wines with superior quality