Augmentation of chemical and organoleptic properties in Syzygium cumini wine by incorporation of grape seeds during vinification

- Role of yeasts and grape seeds on the vinification of Syzygium cumini was examined.
- Grape seed addition improved the chromatic characteristics in wine.
- Cluster analysis illustrated the impact of grape seeds on the perception of panelists in S. cumini wine.
- PLSR explained improvement of organoleptic properties of the wines prepared in combination with grape seeds.

The role of grape seed tannins on improving organoleptic properties and its involvement in color stabilization in red wine are well established. The addition of grape seeds as the source of condensed tannins in fruit wine may provide a solution for its color instability and improvement of sensory attributes. Syzgium cumini is traditionally known for its therapeutic properties. In the current study, the influence of yeasts and grape seed addition during fermentation on the chromatic, phenolic and sensory attributes of the wine was accessed. Grape seed addition improved the color characteristics of wine and increased overall phenolic composition. Analysis by HPLC revealed 6 major anthocyanins, among which 3, 5-diglucoside form of delphidin and petunidin was found to be the major components. Cluster and PLSR analysis explained the impact of seed addition on the yeasts, as well as on the perception of panelists, with bitterness and astringency as the dominating attributes.