Author, as appears in the article.: Balmaseda, Aitor; Rozes, Nicolas; Bordons, Albert; Reguant, Cristina;

Department: Bioquímica i Biotecnologia

URV's Author/s: Balmaseda Rubina, Aitor / Bordons de Porrata- Doria, Albert / Reguant Miranda, Cristina / Rozès, Nicolas Andre Louis

Keywords: Yeasts Wine Volatile Variable number Torulaspora delbrueckii Population dynamics Oenococcus oeni Non-saccharomyces Malolactic fermentation Lactic-acid bacteria Growth Grapes Dynamics Catalonia

Abstract: Background and Aims Torulaspora delbrueckii is being used increasingly as a starter for alcoholic fermentation (AF) because of its chemical modulation of wine. Previous studies on this yeast in a natural must have shown a different Oenococcus oeni population by the end of MLF. In this study we aim to evaluate this aspect in a defined O. oeni strain consortium in a sterile grape must during winemaking. Methods and Results Before commencing AF with either S. cerevisiae or both T. delbrueckii and S. cerevisiae, the must was inoculated with a defined population of O. oeni strains. The use of T. delbrueckii determined the bacterial population at the end of MLF. Also, the inoculation of a selected strain after AF produced wines with different chemical composition to those fermented with the initial bacterial community. Conclusions Different yeast inoculation strategies modulate the O. oeni population, and this has an impact on the chemical composition of the wines. Moreover, the inoculation of a small O. oeni population in must leads to a process similar to spontaneous MLF. Significance of the Study Torulaspora delbrueckii can be used as a tool to modulate the O. oeni population and enhance the aromas related to MLF.

Thematic Areas: Matemática / probabilidade e estatística Horticulture Food science & technology Ciências agrárias i Ciência de alimentos

licence for use: https://creativecommons.org/licenses/by/3.0/es/

Author's mail: aitor.balmaseda@urv.cat cristina.reguant@urv.cat albert.bordons@urv.cat nicolasrozes@urv.cat aitor.balmaseda@urv.cat

Author identifier: 0000-0002-5036-1408 0000-0002-5320-8740 0000-0001-9718-3429

Record's date: 2023-03-05

Papper version: info:eu-repo/semantics/publishedVersion

Link to the original source: https://onlinelibrary.wiley.com/doi/full/10.1111/ajgw.12526

Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: Australian Journal Of Grape And Wine Research. 28 (3): 374-382

APA: Balmaseda, Aitor; Rozes, Nicolas; Bordons, Albert; Reguant, Cristina; (2022). Modulation of a defined community of Oenococcus oeni strains by Torulaspora delbrueckii and its impact on malolactic fermentation. Australian Journal Of Grape And Wine Research, 28(3), 374-382. DOI: 10.1111/ajgw.12526

Article's DOI: 10.1111/ajgw.12526

Entity: Universitat Rovira i Virgili

Journal publication year: 2022

Publication Type: Journal Publications