Effects of physico-chemical factors influencing tyramine production by Carnobacterium divergens.
Tyramine production by a strain of Carnobacterium divergens was tested in relation to different conditions of pH, temperature, glucose, oxygen availability, potassium nitrate and sodium chloride content, using a combination of a Doehlert and Plackett-Burman experimental design. A second degree polynomial model was chosen to describe tyramine production which was quantified by high performance liquid chromatography. Maximal tyramine production occurred during the stationary phase in acidic conditions obtained by low initial pH (< 5) or addition of glucose (0.6%) to the medium. Production was slower at 5 degrees C than at 23 degrees C and 10% sodium chloride inhibited this production. However, the formation of tyramine was not affected by the presence of potassium nitrate or oxygen availability.
Masson
F
F
Laboratoire de Microbiologie, Station de Recherches sur la Viande, INRA, Theix, Saint-Genès-Champanelle, France.
Lebert
A
A
Talon
R
R
Montel
M C
MC
D001431:Bacteriological Techniques; D002455:Cell Division / Q000187:drug effects; D005947:Glucose / Q000494:pharmacology; D006094:Gram-Positive Bacteria / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D008460:Meat / Q000382:microbiology*; D009566:Nitrates / Q000494:pharmacology; D010100:Oxygen / Q000494:pharmacology; D017680:Potassium Compounds / Q000494:pharmacology; D012965:Sodium Chloride / Q000494:pharmacology; D013696:Temperature; D014439:Tyramine / Q000096:biosynthesis*
D009566:Nitrates; D017680:Potassium Compounds; D012965:Sodium Chloride; D005947:Glucose; C023844:potassium nitrate; D010100:Oxygen; D014439:Tyramine