Study of the effects of climatic conditions on the phenolic content and antioxidant activity of Austrian and Montenegrin red wines

We evaluated the chemical composition and antioxidant activity of 30 red wines from Austria (cv. Cabernet-Sauvignon, Blaufraenkisch Zweigelt) 20 Montenegro Cabernet-Sauvignon Vranac) three consecutive vintages: 2014, 2015 2016. determined spectrophotometrically contents total phenol (TP), anthocyanin (TA) low- high-molecular-weight proanthocyanidins (LMP HMP respectively). identified quantified 18 phenolic compounds (hydroxycinnamic acids, hydroxybenzoic stilbenes flavan-3-ols) by high-performance liquid chromatography. In addition, we used Fourier-transform infrared spectroscopy for analyses main wine parameters. Austrian autochthonous exhibited a similar (alcohol 12.4 vol%, pH 3.38). showed higher TP, LMP than Zweigelt wines; however, TA content was similar. also acid, flavan-3-ol stilbene wines. Montenegrin Vranac typical 13.0 3.42), medium to high levels phenols: HMP, LMP, TA, HCA flavan-3-ols. On other hand, they moderate content. some similarities in composition: TA. There were notable variations acid contents, especially content, which much These findings evidence an important impact climatic conditions on these compounds. The all investigated correlated strongly with index, vintage influenced examined groups, except Wines best maturity (2015) contained highest lowest level acids stilbenes. Principle component analysis that mainly discriminated variety origin but not vintage.