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Sodium bicarbonate reduces viability and alters aflatoxin distribution of Aspergillus parasiticus in Czapek's agar

By: Montville, T.J.
Contributor(s): Goldstein, P.K [coaut.].
Material type: materialTypeLabelArticlePublisher: 1987ISSN: 1098-5336 (Revista en electrónico); 0099-2240.Subject(s): Aflatoxins | Agar | Carbon dioxide AGROVOC | Optical properties | Ph In: Applied and Environmental Microbiology v. 53, no. 10, p. 2303-2307615052Summary: The potential of sodium bicarbonate to inhibit growth of and aflatoxin synthesis by A. parasiticus was examined in Czapek's agar (CA), a medium in which fluorescence under UV light indicates aflatoxin production. Incorporation of sodium bicarbonate (SB) into CA at 0.011, 0.022, and 0.033 mol% reduced cell viability 63-, 103-, and >107-fold, respectively. Colonies resulting from surviving cells did not fluoresce under UV light, but thin-layer chromatography analysis of culture extracts detected aflatoxins. Potassium bicarbonate (KB) at 0.011 and 0.022 mol% produced inhibitory effects similar to those of SB, but NaCl and silica had no effect. After 7Collection: Reprints Collection
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Article CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

Reprints Collection REP-4270 (Browse shelf) 1 Available 615052
Total holds: 0

Peer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0099-2240

Tables, literature cited p. 2306-2307

The potential of sodium bicarbonate to inhibit growth of and aflatoxin synthesis by A. parasiticus was examined in Czapek's agar (CA), a medium in which fluorescence under UV light indicates aflatoxin production. Incorporation of sodium bicarbonate (SB) into CA at 0.011, 0.022, and 0.033 mol% reduced cell viability 63-, 103-, and >107-fold, respectively. Colonies resulting from surviving cells did not fluoresce under UV light, but thin-layer chromatography analysis of culture extracts detected aflatoxins. Potassium bicarbonate (KB) at 0.011 and 0.022 mol% produced inhibitory effects similar to those of SB, but NaCl and silica had no effect. After 7

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