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7842950 
Journal Article 
Citrate utilization in milk by Leuconostoc cremoris and Streptococcus diacetilactis 
Cogan, TM 
1975 
Yes 
Journal of Dairy Research
ISSN: 0022-0299
EISSN: 1469-7629 
42 
1 
139-146 
English 
1173068 
Citrate utilization and diacetyl, acetoin and acetaldehyde production by 2 strains each of Leuconostoc cremoris and Streptococcus diacetilactis in milk were studied. With the leuconostoc bacteria no growth and little citrate utilization occurred unless a stimulant (yeast extract) was present, when complete utilization of citrate without concomitant production of diacetyl or acetoin was obtained. The additon of Mn2+ stimulated growth resulted in diacetyl and acetoin production. Destruction of diacetyl and acetoin occurred when the citric acid level fell to c.1000 and 600 mug/g in the case of Leuc. cremoris FR8-1 and CAF1, respectively. Only strain FR8-1 produced acetaldehyde. In contrast, Str. diacetilactis produced diacetyl, acetoin and acetaldehyde concomitant with citrate utilization. 
Butanones; Citrates; Manganese; 42Z2K6ZL8P; Acetaldehyde; GO1N1ZPR3B; Index Medicus; Dose-Response Relationship, Drug; Animals; Butanones -- metabolism; Species Specificity; Acetaldehyde -- metabolism; Manganese -- pharmacology; Leuconostoc -- growth & development; Streptococcus -- drug effects; Milk -- microbiology; Leuconostoc -- metabolism; Leuconostoc -- drug effects; Streptococcus -- growth & development; Streptococcus -- metabolism; Citrates -- metabolism