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. 2026 Mar:134:104951.
doi: 10.1016/j.fm.2025.104951. Epub 2025 Oct 8.

Reduction of acetic acid in Cabernet Sauvignon wine fermented by atmospheric and room temperature plasma-mutagenized Saccharomyces cerevisiae

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Reduction of acetic acid in Cabernet Sauvignon wine fermented by atmospheric and room temperature plasma-mutagenized Saccharomyces cerevisiae

Nan Wu et al. Food Microbiol. 2026 Mar.

Abstract

Acetic acid, a major byproduct of Saccharomyces cerevisiae alcoholic fermentation, hinder fermentation efficiency and wine quality. This study improved wine yeast strains through ARTP mutagenesis, resulting in mutant DC-3 with enhanced fermentation performance and reduced acetic acid production. Analysis of DC-3 showed improved oenological properties, including a 25.84 % decrease in acetic acid production compared to wild-type strain RV002 in synthetic grape juice. The study identified a regulatory mechanism in DC-3 that reduces acetate production by suppressing pyruvate decarboxylase, enhancing alcohol dehydrogenase, and inhibiting acetaldehyde dehydrogenase activities, while redirecting metabolism towards glycerol biosynthesis. Transcriptomic analysis confirmed this metabolic shift. DC-3 consistently produced lower acetic acid levels and exhibited a unique volatile profile with higher alcohols and lower esters, specifically reducing acetate esters compared to RV002 in Cabernet Sauvignon wine. This study introduces a novel approach to breeding low-acetate-producing S. cerevisiae strains in Cabernet Sauvignon wine fermentation using ARTP mutagenesis. It lays the groundwork for enhancing wine fermentation processes.

Keywords: ARTP mutagenesis; Acetic acid; Cabernet Sauvignon wine; Saccharomyces cerevisiae; Volatile aroma profiles.

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Conflict of interest statement

Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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