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Study of polyfunctional thiol precursors in grape must and aromas in wine : focus on interspecific white grape cultivars grown in Belgium

Coster, Maureen
(2022)

Files

Coster_76561700_2022.pdf
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Details

Supervisors
Collin, Sonia ; Chenot, Cécile
Faculty
Faculté des bioingénieurs
Degree label
Master [120] : bioingénieur en sciences agronomiques, à finalité spécialisée
Abstract
The purpose of this thesis was to continue research focusing on the aromatic potential of white interspecific grape cultivars grown in Belgium. In contrast to traditional grape cultivars, interspecific hybrids show higher resistance to fungal diseases and better tolerance to cold. For these reasons they are gaining in popularity in emerging wine producing countries in cooler regions. However, their aromaticity has yet to be studied in greater detail and this constituted the main objective of the present work. The first part of this thesis consisted in the study of non-volatile precursors of a group of aromas called polyfunctional thiols. For this, samples of Solaris, Johanniter and Bronner must were collected from the 2021 harvest. The second part of this thesis consisted in the study of the volatile aroma fraction of three wines: 2021 monovarietal Solaris, 2020 monovarietal Johanniter and 2021 bend (Johanniter, Bronner and Muscaris). A sensory analysis using AEDA was also carried out on these extracts and enabled the identification of some of the most odor-active aromas.