Growth of, and aflatoxin production by Aspergillus parasiticus when in the presence of either Lactococcus lactis or lactic acid and at different initial pH values

Aspergillus parasiticus was grown in a modified Lab-Lemco tryptone broth both as a single culture and in association with Lactococcus lactis. Total aflatoxin (B1 + G1) production was higher in the mixed cultures. This stimulation persisted when different batches of media, inoculation procedures and...

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Bibliographic Details
Published inJournal of applied bacteriology Vol. 69; no. 4; pp. 512 - 519
Main Authors Luchese, R.H, Harrigan, W.F
Format Journal Article
LanguageEnglish
Published England 01.10.1990
Subjects
Aflatoxin B1
aflatoxins
Aflatoxins - biosynthesis
Aspergillus - growth & development
Aspergillus - metabolism
Aspergillus parasiticus
Culture Media
growth
Hydrogen-Ion Concentration
Lactates - pharmacology
Lactic Acid
Lactococcus lactis - growth & development
Lactococcus lactis subsp. lactis
metabolism
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Summary:Aspergillus parasiticus was grown in a modified Lab-Lemco tryptone broth both as a single culture and in association with Lactococcus lactis. Total aflatoxin (B1 + G1) production was higher in the mixed cultures. This stimulation persisted when different batches of media, inoculation procedures and makes of ingredients were used. Aflatoxin yields increased in media with an initial pH of 4.2 compared with a pH close to neutrality. Hydrochloric and/or lactic acid had little effect. The substitution of half the carbon content of the medium by lactate resulted in stimulation or reduction on aflatoxin production when the initial pH was 4.2 or 6.8, respectively.
ISSN:0021-8847
2056-5232
DOI:10.1111/j.1365-2672.1990.tb01543.x