Related Experiment Video
Updated: Aug 5, 2026

The Terroir Concept Interpreted through Grape Berry Metabolomics and Transcriptomics
Published on: October 5, 2016
Yeasts associated to Malbec grape berries from Mendoza, Argentina
M Combina1, L Mercado, P Borgo
1Estación Experimental Agropecuaria Mendoza, Instituto Nacional de Tecnología Agropecuaria (INTA), Mendoza, Argentina. mcombina@mendoza.inta.gov.ar
Aims:
The aims of this work were to evaluate different pre-isolation treatments applied to complete yeast extraction from grapes and to identify the yeast microflora associated to Malbec grapes from two vineyards located in Mendoza, Argentina.
Methods And Results:
The pre-isolation treatments evaluated were shaking, jet streaming with pressurized water and grape blending. The overall results clearly indicated that when a more vigorous and disruptive pre-isolation treatment was applied; larger numbers of yeast species were recovered. The yeast population on healthy and ripe Malbec grapes was in the order of 10(5)-10(6) CFU g(-1). Eight different yeast species were isolated from berries, including Kloeckera apiculata, Metschnikowia pulcherrima, Pichia membranifaciens, Saccharomycodes ludwigii, Candida species (Candida stellata and Candida raghi), Issatchenkia orientalis and Rhodotorula spp.
Conclusions:
Grape blending gave the highest yeast counts. Rainfall near grape harvest time quantitatively and qualitatively modifies the yeast microflora. The yeast species identified on ripe grapes from the Mendoza region, partially match those previously documented in different parts of the world related. S. ludwigii has not been previously reported in grapes.
Significance And Impact Of The Study:
The report is on yeast microbiota in grapes from Mendoza, Argentina. Saccharomycodes ludwigii was found in high percentage (17%), this species has not been described before on grapes surface. The importance of pre-isolation steps to the recovery of high number of yeasts was shown. Influence of climatic conditions near harvest time on microflora was confirmed.
More Related Videos
07:34Profiling the Bacterial Community of Fermenting Traminette Grapes during Wine Production using Metagenomic Amplicon Sequencing
Published on: December 1, 2023
06:53In Vivo Monitoring of Transcriptional Activity During Metabolic Transition Using a Bioluminescent Reporter in Yeast
Published on: February 21, 2025
Related Concept Videos
Microbial Fermentation
Fungal Group Zygomycota
Microbes in Food Production
Microbes in Beverage Production
Microbes in the Production of Fermented Foods
Production of Alcohol