Copper-based grape pest management has impacted wine aroma - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Scientific Reports Année : 2024

Copper-based grape pest management has impacted wine aroma

Résumé

Abstract Despite the high energetic cost of the reduction of sulfate to H 2 S, required for the synthesis of sulfur-containing amino acids, some wine Saccharomyces cerevisiae strains have been reported to produce excessive amounts of H 2 S during alcoholic fermentation, which is detrimental to wine quality. Surprisingly, in the presence of sulfite, used as a preservative, wine strains produce more H 2 S than wild (oak) or wine velum ( flor ) isolates during fermentation. Since copper resistance caused by the amplification of the sulfur rich protein Cup1p is a specific adaptation trait of wine strains, we analyzed the link between copper resistance mechanism, sulfur metabolism and H 2 S production. We show that a higher content of copper in the must increases the production of H 2 S, and that SO 2 increases the resistance to copper. Using a set of 51 strains we observed a positive and then negative relation between the number of copies of CUP1 and H 2 S production during fermentation. This complex pattern could be mimicked using a multicopy plasmid carrying CUP1 , confirming the relation between copper resistance and H 2 S production. The massive use of copper for vine sanitary management has led to the selection of resistant strains at the cost of a metabolic tradeoff: the overproduction of H 2 S, resulting in a decrease in wine quality.
Fichier principal
Vignette du fichier
DeGuidi2024SciReports.pdf (2.35 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-04572656 , version 1 (11-05-2024)

Identifiants

Citer

Irene de Guidi, Virginie Galeote, Bruno Blondin, Jean-Luc Legras. Copper-based grape pest management has impacted wine aroma. Scientific Reports, 2024, 14 (1), pp.10124. ⟨10.1038/s41598-024-60335-9⟩. ⟨hal-04572656⟩
0 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More