Abstract
Fumonisins are carcinogenic mycotoxin. More than 20 analogs of fumonisin were found. It has been considered that fumonisins are produced by Fusarium spices and frequently found from corn and corn products. However, recently it was found that Aspergillus niger has a gene cluster for fumonisins. So fumonisin producing ability of A. niger was evaluated. As the result, it was revealed that A. niger produce fumonisin B2 and B4, and not produce fumonisin B1 nor B3. And then, fumonisin B2 and B4, not B1, were found from grape products and coffee. These findings suggested that fumonisins were naturally occurred by A. niger. Further evolution of research on fumonisin contamination by A. niger was expected, with the solution of the problems in analysis.
