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Journal of Industrial Microbiology

, Volume 7, Issue 3, pp 181–189 | Cite as

Analytical differentiation of wine fermentations using pure and mixed yeast cultures

  • Juan J. Moreno
  • Carmen Millán
  • José M. Ortega
  • Manuel Medina
Original Papers

Summary

Thirty-three fermentations of Pedro Ximénez grapes, collected in three degrees of ripeness, were carried out by inoculation with three types of inoculum: pure cultures ofSaccharomyces cerevisiae races and ofTorulaspora delbrueckii, indigenous yeasts, and mixed cultures of indigenous yeasts enriched with the pure cultures. By means of variance analysis 21 compounds were determined whose final concentrations in the wines significantly depended on the musts, the inocula or both. Eleven products that depended significantly on the inocula were subjected to a discriminant analysis in which most of the pure cultures gathered in a discriminant space area different from that occupied by the indigenous yeasts. The centroids corresponding to most of the mixed cultures were shifted to the central area of the discriminant space, moved away from their corresponding pure cultures and approached the indigenous yeasts. The results show a high similarity between the fermentations carried out with mixed cultures with the addedS. cerevisiae races and those fermentations carried out with the indigenous yeasts, with regard to those compounds which were significantly dependent on the inocula.

Key words

Saccharomyces cerevisiae Torulaspora delbrueckii Aroma 

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Copyright information

© Society for Industrial Microbiology 1991

Authors and Affiliations

  • Juan J. Moreno
    • 1
  • Carmen Millán
    • 1
  • José M. Ortega
    • 1
  • Manuel Medina
    • 1
  1. 1.Departments of Agricultural Chemistry and Microbiology, Faculty of SciencesUniversity of CórdobaCórdobaSpain

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