Influences of chemical fertilizers (in Vitro) on aflatoxin and citrinin synthesis by two strains of Aspergilli |
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Authors: | H A H Hasan A A Issa |
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Institution: | (1) Botany Department, Faculty of Science, Assiut University, Assiut, Egypt |
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Abstract: | The selective effect of various levels of phosphate and nitrate (as fertilizers) on biosynthesis of aflatoxin byAspergillus parasiticus var.globosus, and citrinin byA. terreus var.aureus was studied in defined culture medium. Phosphate at 35–175 mmol per 50 mL decreased aflatoxin production, but increased citrinin
synthesis. Nitrate at 73–365 mmol per 50 mL stimulated the synthesis of aflatoxin but depressed that of citrinin. A rise in
the levels of nitrate and phosphate led to a decrease in aflatoxin production, an increase in citrinin production and an accumulation
of mycelial phosphate and nitrate contents. |
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