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Appl. Environ. Microbiol., Mar 1997, 1165-1167, Vol 63, No. 3
Copyright © 1997, American Society for Microbiology

Effect of salt on the killer phenotype of yeasts from olive brines

P Llorente, D Marquina, A Santos, JM Peinado and I Spencer-Martins
Departamento de Microbiologia, Facultad de Biologia, Universidad Complutense de Madrid, Spain.

The killer properties of yeasts isolated from olive brines were examined in the absence and presence of sodium chloride in concentrations of up to 6% (wt/vol). An apparent enhancement of the killing action as the salt concentration increased, as well as changes in the spectra of activity against selected target strains, was observed in a few strains. Culture filtrates from killer strains grown at different NaCl concentrations (0, 3, or 6% [wt/vol]) were tested against sensitive yeasts cultivated under the same conditions. While the sensitivity of the target strain greatly increased in the presence of salt, no significant effect on toxin production was noticed.


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