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Influence of Atmospheric Oxygen Content on Growth and Fumitremorgin Production by a Heat‐resistant Mold, Neosartorya fischeri
Author(s) -
NIELSEN P.V.,
BEUCHAT L.R.,
FRISVAD J.C.
Publication year - 1989
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.1365-2621.1989.tb04680.x
Subject(s) - mold , darkness , agar , yeast extract , chemistry , yeast , oxygen , food science , chromatography , botany , biology , fermentation , biochemistry , bacteria , organic chemistry , genetics
Growth and fumitremorgin production by a heat‐resistant mold, Neosartorya fischeri , in atmospheres containing 0.0095‐20.9% O 2 were studied over a 38‐day period. The mold was cultured on Czapek Yeast Autolysate agar adjusted to pH 3.5 and 7.0 and incubated at 25°C in darkness. Colonies were examined and extracts were analyzed for fumitremorgin content using high performance liquid chromatography. Growth occurred at O 2 levels as low as 0.10% but not at 0.0095%. Growth was always associated with production of verruculogen and fumitremorgins A and C. Production of these fumitremorgins was essentially the same in atmospheres containing 3.0 and 20.9% O 2 , but was greatly reduced in an atmosphere containing 1.0 and 0.10% O 2 . Fumitremorgin production was not significantly different at pH 3.5 and 7.0