Effect of temperature and glucose concentration on the N-butanoyl-L-homoserine lactone production by Aeromonas hydrophila.
N-butanoyl-L-homoserine lactone (C4-HSL) production by Aeromonas hydrophila 519 has been established. C4-HSL production at 22 and 30 degrees C was found after 20-24 h of incubation corresponding to a population density of ca. 10(8)-10(9) cfu/ml, respectively. Reduced C4-HSL production was noted after 72 h of incubation at 12 degrees C when the culture reached ca. 10(9) cfu/ml. No C4-HSL production was detected at 37 degrees C, although a dense population was obtained. In LB broth supplemented with 0.1% and 0.5% glucose, C4-HSL production was noted whereas with 1% glucose no C4-HSL was detected although a high colony count was obtained. In the latter culture residual levels of glucose (0.65%) were found after 43 h whereas in the 0.1% and 0.5% supplemented LB, glucose was quickly consumed which may have stimulated C4-HSL production. In conclusion, the present study shows an effect of environmental conditions (temperature, glucose concentration) on the C4-HSL production and warrants further investigation to elucidate the effect of external conditions on production of AHL signal molecules to reveal the relevance of quorum sensing in, e.g. foods.
Medina-Martínez
M S
MS
Laboratory of Food Microbiology and Food Preservation, Faculty of BioScience Engineering, Ghent University, UGent, Coupure Links, 653-9000 Ghent, Belgium.
Uyttendaele
M
M
Demolder
V
V
Debevere
J
J
D015107:4-Butyrolactone / Q000031:analogs & derivatives* / Q000096:biosynthesis; D016980:Aeromonas hydrophila / Q000378:metabolism*; D015169:Colony Count, Microbial; D004305:Dose-Response Relationship, Drug; D005506:Food Contamination / Q000032:analysis*; D005516:Food Microbiology; D005947:Glucose / Q000378:metabolism / Q000494:pharmacology*; D007700:Kinetics; D013696:Temperature; D013997:Time Factors
C092312:N-butyrylhomoserine lactone; D005947:Glucose; D015107:4-Butyrolactone