Mycotoxin producing ability of Aspergillus tamarii

This is the authors' abstract. We don't add key points for this paper.

Aspergillus tamarii is known to produce mycotoxins such as cyclopiazonic acid (CPA) and kojic acid (KA).Recently we isolated several cultures of A. tamarii from Japanese tea fields and found one of the isolates "No.19", and single-spore cultures (NRRL 25517, 25518, 25519) derived from this isolate, produced substantial quantities of aflatoxin B1 and B2.Here we report the results of a limited survey of 15 A. tamarii strains isolated from Japanese tea fields, one strain from silk worm excrement and 29 strains received from culture collections.Most A. tamarii isolates produced CPA and KA but only the strains derived from isolate "No.19" and strain NRRL 443 produced aflatoxin B, and B2.Each aflatoxin-producing strain of A, tamarii showed yellow-green colors in young colonies and did not darken in age, suggestive of the "bronze series" .The relation between the levels of CPA or KA production by the individual strains was very weak.