Which white grape variety is renowned for its role in Sauternes and Barsac wines?

Semillon is the white grape variety renowned for its role in the production of Sauternes and Barsac wines, which are celebrated for their exceptional sweetness and complexity. This grape is particularly suited for the production of dessert wines due to its susceptibility to noble rot, also known as Botrytis cinerea. When affected, the grapes’ water content decreases, concentrating the sugars and flavors, leading to the luscious characteristics that define Sauternes and Barsac wines.

In the context of these esteemed wines, Semillon contributes rich, honeyed notes and fruit flavors, making it a perfect partner for the region's unique climate, where the conditions facilitate the development of noble rot. This grape variety is often complemented by small amounts of Sauvignon Blanc and Muscadelle in blends, but Semillon remains the dominant grape, defining the profile of these luxurious sweet wines.

Understanding the significance of Semillon in Sauternes and Barsac highlights its essential role in the vineyards of Bordeaux, showcasing how specific grape varieties thrive in particular climates and conditions to create globally recognized styles.