Aromatic Higher Alcohols in Wine: Implication on Aroma and Palate Attributes during Chardonnay Aging
Antonio G. Cordente, Damian Espinase Nandorfy, Mark Solomon, Alex Schulkin, Radka Kolouchova, I. Leigh Francis +1 more
Molecules
Abstract
The higher alcohols 2-phenylethanol, tryptophol, and tyrosol are a group of yeast-derived compounds that have been shown to affect the aroma and flavour of fermented beverages. Five variants of the industrial wine strain AWRI796, previously isolated due to their elevated production of the 'rose-like aroma' compound 2-phenylethanol, were characterised during pilot-scale fermentation of a Chardonnay juice. We show that these variants not only increase the concentration of 2-phenylethanol but also modulate the formation of the higher alcohols tryptophol, tyrosol, and methionol, as well as other volatile sulfur compounds derived from methionine, highlighting the connections between yeast nitrogen and sulfur metabolism during fermentation. We also investigate the development of these compounds during wine storage, focusing on the sulfonation of tryptophol. Finally, the sensory properties of wines produced using these strains were quantified at two time points, unravelling differences produced by biologically modulating higher alcohols and the dynamic changes in wine flavour over aging.
Extracted Claims
5 claims extracted from this paper into the knowledge graph
sulfonation of tryptophol occurs during wine storage
“We also investigate the development of these compounds during wine storage, focusing on the sulfonation of tryptophol”
five variants of the industrial wine strain AWRI796 increase the concentration of 2-phenylethanol
“Five variants of the industrial wine strain AWRI796, previously isolated due to their elevated production of the 'rose-like aroma' compound 2-phenylethanol, were characterised during pilot-scale ferme...”
sensory properties of wines produced using these strains were quantified at two time points
“Finally, the sensory properties of wines produced using these strains were quantified at two time points, unravelling differences produced by biologically modulating higher alcohols and the dynamic ch...”