Comparison of Aflatoxin B1 production by Aspergillus flavus and Aspergillus parasiticus Under various conditions of temperature, light and pH

Aflatoxins are a large group of mycotoxins. The aim of the present study was the Comparison of Aflatoxin B1 production by Aspergillus flavus and Aspergillus parasiticus under various conditions of temperature، light، and pH. In this experimental study، Twenty four flasks were assigned for incubation of each of the fungi Aspergillus flavus and parasiticus at 18، 24، 32 ° C. Both flasks were maintained under conditions of light and darkness. The rate of aflatoxin B1 produced by each groups، was measured by thin layer chromatography. Data were analyzed using descriptive statistical analysis. The lowest yield of aflatoxin produced by Aspergillus flavus and parasiticus belonged to 32 ° C and pH 6. 5، respectively. On the other hand، the highest yield of toxin was observed at 24 ° C and pH 6. The lighting effects were considerable; according to the studies on the adverse effects of light and the fermentation process، aflatoxin production increased in dark conditions. the results of study showed that Aspergillus flavus produced more aflatoxin than Aspergillus parasiticus.