Viticulture factors influencing grape composition and wine flavor

The characteristics of grapes used for winemaking differ significantly from table grapes. Wine varieties typically feature smaller calibers, thicker skins, and higher seed counts, but they possess much higher sugar levels. This high sugar content results in a more intense flavor profile compared to table grapes, which are bred for ease of consumption and higher pulp content.

Research indicates that even when using the same grape variety and standardized winemaking procedures, the final product can vary due to the cultivation environment. A study of Malbec from 27 different plots in Mendoza, Argentina, revealed distinct chemical and sensory differences based on origin. Factors such as temperature, light, water, and vineyard management alter the grape's composition before it reaches the winery. Similar variations have been observed with the Corvina variety in Verona, Italy, where plant responses differed based on the specific vineyard and harvest year.