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Bioremediation of aflatoxins by some reference fungal strains

100%

El-Shiekh H. H. , Mahdy H. M. , El-Aaser M. M.

Polish Journal of Microbiology

2007

tom 56

nr 3

Aspergillus parasiticus RCMB 002001 (2) producing four types of aflatoxins B₁ B₂, G₁, and G₂ was used in this study as an aflatoxin-producer. Penicillium griseofulvum, P. urticae, Paecilomyces lilacinus, Trichoderma viride, Candida utilis, Saccharomyces cerevisiae as well as a non-toxigenic strain of Aspergillus flavus were found to be able to exhibit growth on aflatoxin B₁-containing medium up to a concentration of 500 ppb. It was also found that several fungal strains exhibited the growth in co-culture with A. parasiticus, natural aflatoxins producer, and were able to decreased the total aflatoxin concentration, resulting in the highest inhibition percentage of 67.2% by T. viride, followed by P. lilacinus, P. griseofulvum, S. cerevisiae, C. utilis, P. urticae, Rhizopus nigricans and Mucor rouxii with total aflatoxin inhibition percentage of 53.9, 52.4, 52, 51.7,44, 38.2 and 35.4%, respectively. The separation of bioremediation products using GC/MS revealed that the toxins were degraded into furan moieties.

Physiological and biochemical changes induced by osmolarity in halotolerant Aspergilli

100%

Mahdy H. M. , El-Sheikh H. H. , Ahmed M. S. , Refaat B. M.

Acta Microbiologica Polonica

1996

tom 45

nr 1