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United States Department of Agriculture

Agricultural Research Service

Research Project: Detection and Quality Impact Zygosaccharomyces in Wines

Location: Horticultural Crops Research

Project Number: 2072-21000-048-01
Project Type: Grant

Start Date: Sep 01, 2011
End Date: Mar 31, 2014

Objective:
Evaluate methods of detection for Zygosaccharomyces; Determine the impact of selected strains of Zygosaccharomyces on wine composition and quality.

Approach:
Strains will be grown on non-selective media for routine maintenance and preparation of starter cultures for wine inoculation. Modification and optimization of alternative selective media will focus on (a) substitution of carbon sources and (b) lowering the water activity of the medium. Selected strains of Zygosaccharomyces will be inoculated small scale. During incubation, general analyses to be performed include culturability (plate count), volatile acidity (Cash still), and, if applicable, rate of fermentation (soluble solids). For those strains were no obvious sensory differences exist between wines without or with inoculation of Zygosaccharomyces, vinification experiments of a larger scale will be conducted with additional chemical and sensory analyses.

Last Modified: 12/22/2014
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