Abstract
p6e production of aflatoxins by Aspergillus flavus SRRC-1000 growing on soybean (Forrest) and glandless cottonseed (Deltapine 16) meals was examined with respect to effects of zinc and phytate. Aflatoxins were not produced on unautoclaved soybean meal. Addition of zinc (as zinc sulfate) to autoclaved meal inhibited aflatoxin production and supplementation with sodium phytate relieved this inhibition. Addition of sodium phytate alone promoted production. When cottonseed meal was treated to release native phytate into the meal from phytate-sequestering globoids, aflatoxin production increased. However, the largest production on cottonseed meal occurred upon dialysis of the meal without releasing phytate, implying removal of a small molecular weight inhibitor.
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