Influence of terroir on the concentration of selected stilbenes in wines of the cv. Riesling in the Czech Republic
2012
Kumsta, M., Mendelova Univ., Lednice (Czech Republic). Zahradnicka Fakulta | Pavlousek, P., Mendelova Univ., Lednice (Czech Republic). Zahradnicka Fakulta | Kupsa, J., Mendelova Univ., Lednice (Czech Republic). Zahradnicka Fakulta
The subject of the study was the analysis of 43 wines of the cv. Riesling from six wine-growing sub-regions, 16 different localities and four vintages to determine the content of trans-resveratrol, trans-piceid, cis-resveratrol and cis-piceid. HPLC was used to analyse the samples. A relationship was observed between trans-resveratrol concentration in wines and wine-growing locality. The concentration of trans-resveratrol ranged from 0.04 to 0.82 mg/L (0.28 mg/L on average). The highest concentrations of trans-resveratrol were found in wines from the localities Podmoli (0.66 mg/L), Hosteradice (0.64 mg/L and 0.82 mg/L), Melnik (0.59 mg/L) and Litomerice (0.57 mg/L). Differences were also found in the relationship between trans-resveratrol and wine-growing sub-regions. Relationships between trans-piceid, cis-resveratrol or cis-piceid concentration and wine terroir were not demonstrated. The results of this study demonstrated the capability to differentiate the wine terroir using the trans-resveratrol concentrations.
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