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Effects of Sorbate and Propionate on Growth and Aflatoxin Production of Sublethally injured Aspergillus parasiticus
Author(s) -
TSAI WEIYUN J.,
SHAO KUNGPING P,
BULLERMAN LLOYD B
Publication year - 1984
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.1365-2621.1984.tb13676.x
Subject(s) - aflatoxin , aspergillus parasiticus , spore , food science , propionate , chemistry , mycotoxin , aspergillus , biology , microbiology and biotechnology , biochemistry
Growth and aflatoxin production by injured spores (heat, 55°C for 15 min, γ‐irradiation, 50 Krad) of Aspergillus parasiticus in the presence of sorbate (0.05 and 0.1%) and propionate (0.2 and 0.4%) were studied in YES broth at pH 4.5, 5.5 and 6.5, and 25°C for 21 days. Aflatoxin production was accelerated in the early stages of growth by γ‐irradiation, but not heat. Growth and aflatoxin were delayed in cultures from low numbers of uninjured spores. Aflatoxin increased and was produced sooner by low numbers of uninjured spores in 0.05% sorbate. Both inhibitors slowed growth of injured spores more than non‐injured. Inhibition of aflatoxin was dependent on the concentration of inhibitor, pH and injury.