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Adaptive growth at high temperatures of the lactose‐fermenting yeast Kluyveromyces marxianus var. marxianus
Author(s) -
Sampaio J. P.,
SpencerMartins I.
Publication year - 1989
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.3620290115
Subject(s) - kluyveromyces marxianus , lactose , yeast , growth rate , fermentation , arrhenius equation , strain (injury) , biomass (ecology) , food science , chemistry , biology , biochemistry , saccharomyces cerevisiae , activation energy , organic chemistry , mathematics , agronomy , geometry , anatomy
The temperature profile of growth and death rates of a strain of Kluyveromyces marxianus var. marxianus was found to be essentially dissociative, with an optimum temperature for growth at around 38 °C and sustained exponential growth up to 43–44 °C. At temperatures near the maximum temperature for growth a second growth period was observed. This did not correspond to the second branch in the ARRHENIUS plots characteristic of associative profiles, since growth was not balanced and after a while the growth rate increased to values similar to those of the first period. The biomass yield on lactose was not dependent on the growth temperature, a behaviour typical of yeast strains with dissociative temperature profiles.