Diauxic Growth of Azotobacter vinelandii on Galactose and Glucose: Regulation of Glucose Transport by Another Hexose.

Applied and Environmental Microbiology
T Y WongG W Childers

Abstract

The growth curve of Azotobacter vinelandii was biphasic when the organism was grown in a medium containing a mixture of galactose and glucose. Galactose was the primary carbon source; glucose was also consumed, but the rate at which it was consumed was lower than the rate at which galactose was consumed during the first phase of growth. Metabolic pathways for both sugars were induced. Cell cultures exhibited a second lag period as galactose was depleted. The length of this lag phase varied from 2 to 10 h depending on the pregrowth history of the cells. The second log growth phase occurred at the expense of the remaining glucose in the medium and was accompanied by induction of the high-maximum rate of metabolism glucose-induced glucose permease and increases in the levels of glucose metabolic enzymes. The second lag phase of diauxie may have been due to the time required for induction of the glucose-induced glucose permease.

References

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Citations

Mar 2, 2006·Archives of Microbiology·Christophe ColletPhilippe Soucaille
Mar 19, 2014·Applied and Environmental Microbiology·Phillip B GedalangaShaily Mahendra
Jun 19, 2015·Journal of Environmental Science and Health. Part C, Environmental Carcinogenesis & Ecotoxicology Reviews·Tit-Yee Wong, Steve D Schwartzbach
Mar 7, 2020·World Journal of Microbiology & Biotechnology·Carlos MillánTania Castillo
Feb 15, 2020·FEMS Microbiology Letters·Julia-Beate TästensenPeter Schönheit
Sep 16, 2017·Journal of Food and Drug Analysis·Tit-Yee Wong

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