Stimulation of bacteriocin production by dialysed culture media from different lactic acid bacteria

Abstract

Headline: Stimulation of bacteriocin production by dyalised culture media. Keywords: bacteriocin production; stimulatory effects. *Corresponding author: [email protected] Abstract The cross-effects of dyalised postincubates (with a cut-off at 1,000 Da) on the biomass and bacteriocin production of six strains of lactic acid bacteria were studied, and a predominance of stimulating responses was found, the characteristics of which suggested merely nutritional effects or the presence of precursor fragments of the bacteriocins. Additionally, the cluster analysis of the detected responses provides an approach to define groups of highly (potential consortia) or doubtfully compatible strains of lactic acid bacteria. Such a definition, that does not claim taxonomic value, has practical interest, however, in cases (e.g. silage production) in which it is convenient the use of mixed inocula including strains able to establish positive interactions. J.A. Vázquez et al .-1