Protein/polysaccharide interactions and their impact on haze formation in white wines
- Dufrechou, Marie
- Doco, Thierry
- Poncet-Legrand, Celine
- Sauvage, Francois Xavier
- Vernhet, Aude
DOIAbstract
Proteins in white wines may aggregate and form hazes at room temperature. This was previously shown to be related to pH-induced conformational changes and to occur for pH <3.5. The aim of the present work was to study the impact of wine polysaccharides on pH-induced haze formation by proteins but also the consequences of their interactions with these proteins on the colloidal stability of white wines. To this end, model systems and purified global pools of wine proteins and polysaccharides were used first. Kinetics of aggregation, proteins involved, and turbidities related to final hazes were monitored. To further identify the impact of each polysaccharide, fractions purified to homogeneity were used in a second phase. These included two ne...
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