Abstract
This work describes the influence of yeast population on the chemical characteristics of wine obtained by spontaneous and inoculated fermentation of must from Vitis vinifera Lado, a minor white grapevine autochthonous to Galicia (NW Spain). The study was carried out for two consecutive years. The results showed that musts derived from Lado presented a high acidity though the potential alcohol level was acceptable. The genetic diversity of S. cerevisiae strains isolated from spontaneous fermentations was low, probably due to must characteristics, although these did not interfere with the implantation of the commercial strains used. Analyses showed that the wines subsequently produced had high alcoholic levels and very high acidities (pH 3.0) as was expected from must composition. Wines obtained from spontaneous fermentations had a lower alcohol content but higher total acidity than those from inoculated fermentations. Monovarietal wines produced from Lado were poorly evaluated in sensorial tests because of their unbalanced structure and sourness; however, when they were mixed with other autochthonous white varieties with less acidity, the resulting wines were well accepted.
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Acknowledgements
This work was supported by the Spanish Government grant VIN03-029 from Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA) and by FEDER research funds.
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Blanco, P., Vázquez-Alén, M. & Losada, A. Influence of yeast population on characteristics of the wine obtained in spontaneous and inoculated fermentations of must from Vitis vinifera Lado. J Ind Microbiol Biotechnol 35, 183–188 (2008). https://doi.org/10.1007/s10295-007-0282-9
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DOI: https://doi.org/10.1007/s10295-007-0282-9