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Open AccessArticle

Large-Scale Screening of Thiol and Fermentative Aroma Production during Wine Alcoholic Fermentation: Exploring the Effects of Assimilable Nitrogen and Peptides

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SPO, INRAE, University of Montpellier, Montpellier SupAgro, 34000 Montpellier, France
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MISTEA, INRAE, University of Montpellier, Montpellier SupAgro, 34000 Montpellier, France
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Nyseos, 53 Rue Claude François, 34080 Montpellier, France
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Lallemand SAS, 19 Rue des Briquetiers, 31702 Blagnac, France
*
Author to whom correspondence should be addressed.
Fermentation 2020, 6(4), 98; https://doi.org/10.3390/fermentation6040098
Received: 8 September 2020 / Revised: 29 September 2020 / Accepted: 30 September 2020 / Published: 6 October 2020
(This article belongs to the Special Issue Non-Saccharomyces Yeasts as Aroma Enhancers in Fermented Products)
In alcoholic fermentation, under oenological conditions, the environmental parameters impacting fermentation kinetics and aroma production have been widely studied. The nitrogen content of grape must was found to be one of the most important parameters for both of these aspects of fermentation. Many studies have been performed on the effect of mineral nitrogen addition. However, it has increasingly been observed that the nature of the nitrogen added leads to different results. Our work focused on the effects of peptide addition on both fermentation kinetics and aroma production. Peptides are one of the less well understood sources of assimilable nitrogen, as their incorporation by yeast remains unclear. In this study, we compared the effect of the addition of a “classic” assimilable nitrogen source (ammonium + amino acids) with that of peptide addition in both white and red must fermentation by screening 18 Saccharomyces cerevisiae strains in total. Our data show that peptide addition enhances fermentation kinetics and leads to specific changes in the production of fermentative aromas. The impact of peptides on thiol synthesis is rather limited. View Full-Text
Keywords: nitrogen; peptide; Saccharomyces cerevisiae; alcoholic fermentation; aromas; thiols nitrogen; peptide; Saccharomyces cerevisiae; alcoholic fermentation; aromas; thiols
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MDPI and ACS Style

Duc, C.; Maçna, F.; Sanchez, I.; Galeote, V.; Delpech, S.; Silvano, A.; Mouret, J.-R. Large-Scale Screening of Thiol and Fermentative Aroma Production during Wine Alcoholic Fermentation: Exploring the Effects of Assimilable Nitrogen and Peptides. Fermentation 2020, 6, 98.

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