Inhibition of growth and aflatoxin production of Aspergilli in medium containing phosphates

Mycelial growth and mycotoxin production of Aspergillus flavus and A. parasiticus were studied in Sabouraud dextrose agar containing pure or blended pyro-, poly- or meta-phosphates during 9 d of incubation at 30°C. Pure tetrasodium pyrophosphate (TSPP) and sodium polyphosphate, glassy (SPG, formerly...

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Bibliographic Details
Published in:Journal of food protection 1989, Vol.52 (1), p.4-6
Main Authors: LEBRON, C. I, MOLINS, R. A, WALKER, H. W, KRAFT, A. A, STAHR, H. M
Format: Article
Language:English
Subjects:
Biological and medical sciences
Food additives
Food industries
Fundamental and applied biological sciences. Psychology
General aspects
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Summary:Mycelial growth and mycotoxin production of Aspergillus flavus and A. parasiticus were studied in Sabouraud dextrose agar containing pure or blended pyro-, poly- or meta-phosphates during 9 d of incubation at 30°C. Pure tetrasodium pyrophosphate (TSPP) and sodium polyphosphate, glassy (SPG, formerly hexametaphosphate), as well as a commercial phosphate blend and three combinations all containing various proportions of sodium acid pyrophosphate (SAPP), TSPP and SPG were tested. Inhibition of growth of aspergilli was observed in media containing 2.0% TSPP and 1.0 and 2.0% SPG and 2.0% of the commercial phosphate blend. Lower concentrations of single or blended phosphates allowed only limited, atypical mycelial growth. Sporulation was totally inhibited by 2.0% concentrations of single or blended phosphates, and so was production of aflatoxins B and G . TSPP or SPG at 1.0% reduced (P
ISSN:0362-028X
1944-9097
DOI:10.4315/0362-028X-52.1.4