Open AccessCompetition between different strains of Streptococcus cremoris
Author(s) -
Hugenholtz J.,
Veldkamp H.
Publication year - 1985
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1985.tb01131.x
Subject(s) - strain (injury) , microbiology and biotechnology , dilution , agar , bacteria , lactose , biology , food science , anaerobic exercise , competition (biology) , enrichment culture , agar plate , chemistry , genetics , physiology , ecology , physics , anatomy , thermodynamics
Streptococcus cremoris strain HP was found to grow poorly on agar plates under aerobic conditions in comparison to several other strains of S. cremoris (Wg2, ML1, AM1, E8). This made it possible to determine the numbers of strain HP in mixed cultures with other strains under different culture conditions. None of the mixtures was stable in batch cultures as a result of differences in the maximum specific growth rate. In continuous culture under lactose limitation strain HP outcompeted strains E8 and ML1 at low dilution rates, but at high dilution rates and in batch culture the reverse was observed. This represents another example of crossing μ‐s curves in anaerobic bacteria.