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Título

Ecological interactions among Saccharomyces cerevisiae strains: insight into the dominance phenomenon

Otros títulosPérez-Torrado, Roberto ; Rantsiou, K ; Perrone, B ; Navarro-Tapia, Elizabeth ; Querol, Amparo ; Cocolin, L.
AutorPérez Torrado, Roberto ; Rantsiou, Kalliopi; Perrone, Benedetta; Navarro Tapia, Elisabet; Querol, Amparo ; Cocolin, Luca
Palabras claveSaccharomyces cerevisiae
Intraspecies competition
Dominance
Fermentation
Aggregation
Transcriptoma
Sulphites
Fecha de publicaciónmar-2017
EditorNature Publishing Group
CitaciónScientific Reports 7: Article number 43603 (2017)
ResumenThis study investigates the behaviour of Saccharomyces cerevisiae strains, in order to obtain insight into the intraspecies competition taking place in mixed populations of this species. Two strains of S. cerevisiae, one dominant and one non-dominant, were labelled and mixed, and individual fermentations were set up to study the transcriptomes of the strains by means of RNA-seq. The results obtained suggest that cell-to-cell contact and aggregation, which are driven by the expression of genes that are associated with the cell surface, are indispensable conditions for the achievement of dominance. Observations on mixed aggregates, made up of cells of both strains, which were detected by means of flow cytometry, have confirmed the transcriptomic data. Furthermore, overexpression of the SSU1 gene, which encodes for a transporter that confers resistance to sulphites, provides an ecological advantage to the dominant strain. A mechanistic model is proposed that sheds light on the dominance phenomenon between different strains of the S. cerevisiae species. The collected data suggest that cell-to-cell contact, together with differential sulphite production and resistance is important in determining the dominance of one strain over another.
Versión del editorhttp://dx.doi.org/10.1038/srep43603
URIhttp://hdl.handle.net/10261/147386
DOI10.1038/srep43603
E-ISSN2045-2322
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