INVESTIGADORES
ORIGONE Andrea Cecilia
artículos
Título:
Fermentative behaviour and competition capacity of cryotolerant Saccharomyces species in different nitrogen conditions
Autor/es:
SU YING; ORIGONE ANDREA CECILIA; RODRÍGUEZ MARÍA EUGENIA; QUEROL AMPARO; GUILLAMÓN JOSÉ MANUEL; LOPES CHRISTIAN ARIEL
Revista:
FOOD MICROBIOLOGY
Editorial:
ACADEMIC PRESS LTD-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2019 vol. 291 p. 111 - 120
ISSN:
0740-0020
Resumen:
The selection of yeasts with low nitrogen requirement is a current need in winemaking. In this work, we analysed nitrogen requirements of strains belonging to the cryotolerant species S. uvarum, S. eubayanus and S. kudriavzevii, in order to evaluate their potential for conducting the fermentation of low nitrogen content grape musts. Our result demonstrated that S. eubayanus is the species less influenced by the increasing nitrogen concentrations in both growth and fermentation conditions. Strains showing the best behaviours, S. eubayanus NPCC 1285 and S. uvarum NPCC 1317, were selected to be tested in mixed cultures with S. cerevisiae T73 at different temperatures (12 °C, 20 °C and 28 °C) in synthetic grape must with different nitrogen concentrations (60, 140 and 300 mg/L YAN). The cryotolerant strains dominated the fermentations carried out at 12 °C while S. cerevisiae prevailed at 28 °C independently from the nitrogen concentration. At intermediate temperature, 20 °C, S. eubayanus mono and mixed cultures showed the best fermentative behaviour especially with low and intermediate nitrogen concentration. In summary, cryotolerant Saccharomyces species, particularly S. eubayanus, could be interesting tools to avoid fermentations stucks caused by low nitrogen content in grape musts.