Modelling the growth dynamics of interacting mixed cultures: a case of amensalism.
In this work, a specific membrane bioreactor was used to perform co-cultures of two Saccharomyces cerevisiae yeast strains: a killer strain and a sensitive strain. Biomass could be segregated into four groups: viable killer yeasts, dead killer yeasts, viable sensitive yeasts and dead sensitive yeasts. An existing mathematical model describing the population dynamics in the mixed killer/sensitive cultures was confronted with the new experimental data. As it gave poor accuracy, some improvements were proposed and tested. In particular, a lag phase before the beginning of the lethal interaction between the two strains was introduced, in correspondence to the experimental observations.
Pommier
S
S
Laboratoire de Génie Chimique UMR 5503, 5 rue Paulin Talabot, 31106 Toulouse cedex 1, France.
Strehaiano
P
P
Délia
M L
ML
D000898:Antibiosis; D019149:Bioreactors; D018920:Coculture Techniques; D005285:Fermentation; D055646:Killer Factors, Yeast; D008954:Models, Biological; D008962:Models, Theoretical; D009183:Mycotoxins; D011157:Population Dynamics; D012441:Saccharomyces cerevisiae / Q000254:growth & development* / Q000502:physiology*; D029701:Saccharomyces cerevisiae Proteins; D013045:Species Specificity
D055646:Killer Factors, Yeast; D009183:Mycotoxins; D029701:Saccharomyces cerevisiae Proteins