Estudi de lisogènia de leuconostoc oenos i incidència dels bacterioags sobre fermentació malolàctica del vi

Identifier:  TDX:358

Handle: https://hdl.handle.net/20.500.11797/TDX358

Authors:  Poblet Icart, Montserrat

Abstract:
A large number of strains of Oenococcus oeni (formerly Leuconostoc oenos) that had been isolated from wines were checked for lisogeny with mitomicyn C as inducer. As a result of this test, half of the strains proved to be lisogenic, suggesting that lisogeny is widespread among bacteria isolated from wines during malolactic fermentation. The sensitivity of bacteria to phages was very different, depending on the strain. All the lysogenic strains were resistant to infection by the temperate phage they released. Some phages infected none of the strains. Phages of O. oeni had a classical morphology, an isometric head, and a long striated tail. With the broadest host strain as an indicator, phages were detected in wines after malolactic fermentation.