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Citrate metabolism in 16 Leuconostoc mesenteroides subsp. mesenteroides and subsp. dextranicum strains
Author(s) -
Bellengier Pascale,
Hemme D.,
Foucaud Catherine
Publication year - 1994
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1994.tb03044.x
Subject(s) - leuconostoc mesenteroides , acetoin , leuconostoc , diacetyl , metabolism , acetaldehyde , biochemistry , chemistry , lactic acid , biology , bacteria , fermentation , ethanol , lactobacillus , genetics
Citrate metabolism was studied in non‐growing cells of Leuconostoc mesenteroides subsp. mesenteroides and subsp. dextranicum with respect to energetics, formation of degradation products and stoichiometry. The use of selective ionophores and uncoupler showed that citrate utilization was coupled to the proton motive force generated by ATP hydrolysis. Differences in citrate metabolism observed in 20 Leuconostoc strains were related to strains but not to the species or subspecies studied. Citrate metabolism was stimulated by glucose up to a concentration of 25 mmol 1 ‐1 and decreased at higher concentrations. The main degradation products resulting from the co‐metabolism of citrate (10 mmol 1 ‐1 ) and glucose (2 mmol 1 ‐1 ) were acetate, lactate and pyruvate. Only four Leuconostoc strains produced low levels of acetoin and diacetyl. No strains produced ethanol or acetaldehyde. Citrate degradation ability was stable for at least 130 generations in 81% of the Leuconostoc strains.