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Influences of Temperature on Growth of Leuconostoc cremoris

Department of Food Science and Technology, University of California, Davis 95616

ABSTRACT

Optimal growth temperatures in citrate broth for six strains of Leuconostoc cremoris varied from 24 through 27 C and averaged 26 C. The average generation time at 26 C was 3.2 h. Minimal and maximal growth temperatures were 14 to 17 and 34 to 36 C, respectively. Comparison of the data for L. cremoris to that previously obtained for Streptococcus cremoris suggests that 22 to 25 C is the appropriate temperature range for propagating dairy cultures containing lactic streptococci and L. cremoris. Molar growth yields and values for end products produced in citrate broth (with citrate and acetate omitted) were excessively high because energy was gained and end products were produced from constituents of the complex medium other than added glucose.