Anthocyanin Addition Alters Tannin Extraction from Grape Skins in Model Solutions via Chemical Reactions
| Autor: | James R Campbell, James A. Kennedy, Florian Grosnickel, Andrew L. Waterhouse |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Color Wine 01 natural sciences Chemical reaction Anthocyanins chemistry.chemical_compound Pigment Tannin Vitis Food science chemistry.chemical_classification 010401 analytical chemistry Extraction (chemistry) food and beverages Ripening General Chemistry 0104 chemical sciences Molecular Weight chemistry Fruit Anthocyanin visual_art visual_art.visual_art_medium Condensed tannin General Agricultural and Biological Sciences Tannins 010606 plant biology & botany |
| Zdroj: | Journal of Agricultural and Food Chemistry. 69:7687-7697 |
| ISSN: | 1520-5118 0021-8561 |
| DOI: | 10.1021/acs.jafc.1c00112 |
| Popis: | Condensed tannin extraction and stable color formation are two of the cornerstones of red wine production. Without condensed tannin, red wine would lack the tactile feeling of astringency, and without the formation of modified pigments, it would lack color stability for long-term aging. To understand how malvidin-3,5-diglucoside interacts with condensed tannin under nonoxidative conditions, an experiment was designed conducting model-wine skin extractions of Sauvignon blanc grapes harvested at various dates of maturity. Monomeric malvidin-3,5-diglucoside was isolated from color concentrate and added during these extractions. Following a 72 h extraction, solutions were evaluated for recovery of monomeric anthocyanins, skin tannin concentration, skin tannin extractability, and impact of anthocyanins on condensed tannin size. Anthocyanins showed a significant impact on the extraction of flavan-3-ol material in the early stages of ripening that declined in the latter stages of ripening. Furthermore, anthocyanins significantly decreased the size of the condensed tannin extracted. These results suggest that anthocyanins are not only enhancing the extractability of condensed tannin but also readily incorporating into the polymeric material, leading to a decrease in the average molecular mass of the condensed tannin polymer. The extent of reaction in 72 h suggests that the rate of interflavan bond cleavage may be higher than previously reported and merits closer scrutiny. |
| Databáze: | OpenAIRE |
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