Comparison of biocontrol activity of Kluyveromyces lactiswith other yeast strains against Penicillium expansum

Taczman-Brückner, A. and Mohácsi-Farkas, Cs. and Balla, Cs. and Kiskó, G. (2005) Comparison of biocontrol activity of Kluyveromyces lactiswith other yeast strains against Penicillium expansum. Acta Alimentaria, 34 (1). pp. 71-80. ISSN 0139-3006

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Abstract

Applying antagonistic yeasts is one of the recent possibilities for controlling postharvest disease caused by blue mould (Penicillium expansum). In this work, antagonistic activity of several Kl. lactisstrains was tested against two strains of P. expansum. Three strains of Kl. lactiswere compared to three biocontrol yeasts: Metschnikowia pulcherrima, Sporobolomyces roseusand Pichia anomala. The investigations were carried out at 25 °C, 15 °C and 5 °C, applying different yeast cell densities and culture media. Statistical analysis showed no significant differences among the three Kl. lactisstrains. The inhibitory effect of the tested yeasts was different according to the applied mould strain temperature, culture medium and cell density. Application of antagonistic yeasts combined with reduced temperature enhanced the inhibitory effect. Direct relationship was observed between increasing cell density and the biocontrol efficiency of Kl. lactis. According to this work, Kl. lactisis a possible biocontrol agent.

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