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EFFECTS OF MALVIDIN‐3,5‐DIGLUCOSIDE AND CYANIDIN CHLORIDE ON FOUR SALMONELLA SEROTYPES
Author(s) -
PAGENKOPF ANDREA L.,
WOODBURN MARGY
Publication year - 1970
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1970.tb00926.x
Subject(s) - malvidin , pigment , respiration , salmonella , anthocyanin , chemistry , food science , cyanidin , biochemistry , biology , bacteria , botany , genetics , organic chemistry
SUMMARY— Reductions in numbers but no depression of respiration of 4 Salmonella serotypes over a 7.0‐hr period was noted when they were incubated in the presence of anthocyanin pigments, malvidin‐3.5diglucoside or cyanidin chloride. At certain concentrations of these pigments in the presence of glucose, stimulation of the respiration of some serotypes was evident. Slight reductions in cell numbers were noted as concentrations of malvidin‐3,5‐diglucoside increased. Comparable counts were obtained upon plating the cells on minimal and complete media, indicating lack of metabolic damage to those cells present. An enzyme assay utilizing the respiration of Saccharomyces cerevisiae var. ellipsoideus indicated the possibility of an anthocyanase in the cells which had been preincubated in the presence of the diglucoside of malvidin without glucose but not with glucose. If this observation were substantiated, it would indicate the production of a glucose‐repressible anthocyanase. No evidence was obtained to indicate utilization of the aglycone by any of the 4 serotypes.