Role for compatible solutes glycine betaine and L-carnitine in listerial barotolerance.
Increased listerial barotolerance at elevated osmolarity is attributed, in part, to the presence of accumulated betaine and L-carnitine. The percentage of listerial survival following exposure to 400 MPa for 5 min increased from 0.008 to 0.02% with added L-carnitine (5 mM) and to 0.05% with added betaine (5 mM). Furthermore, listerial cells incapable of transporting compatible solutes fail to adapt to high pressure at elevated osmolarity.
Smiddy
Mary
M
Department of Food and Nutritional Sciences, University College, Cork, Ireland.
Sleator
Roy D
RD
Patterson
Margaret F
MF
Hill
Colin
C
Kelly
Alan L
AL
D001622:Betaine / Q000378:metabolism*; D002331:Carnitine / Q000378:metabolism*; D003470:Culture Media; D015964:Gene Expression Regulation, Bacterial; D006874:Hydrostatic Pressure; D008087:Listeria / Q000254:growth & development / Q000378:metabolism / Q000502:physiology*; D009994:Osmolar Concentration; D012965:Sodium Chloride / Q000494:pharmacology
D003470:Culture Media; D001622:Betaine; D012965:Sodium Chloride; D002331:Carnitine