Previous View
 
APSnet Home
 
Phytopathology Home


VIEW ARTICLE

Postharvest Pathology and Mycotoxins

Phytotoxicity of Fumonisin B1, Moniliformin, and T-2 Toxin to Corn Callus Cultures. M. A. J. Van Asch, Department of Microbiology and Plant Pathology, University of Natal, P.O. Box 375, Pietermaritzburg 3200, Republic of South Africa; F. H. J. Rijkenberg, and T. A. Coutinho. Department of Microbiology and Plant Pathology, University of Natal, P.O. Box 375, Pietermaritzburg 3200, Republic of South Africa. Phytopathology 82:1330-1332. Accepted for publication 19 May 1992. Copyright 1992 The American Phytopathological Society. DOI: 10.1094/Phyto-82-1330.

The phytotoxicity of the Fusarium moniliforme metabolite, fumonisin B1 (FB1), to corn callus cultures was determined and compared with two other Fusarium mycotoxins with known phytotoxic effects, moniliformin, and T-2 toxin. The callus was grown on modified MS medium containing either 0.1, 1.0, 10, or 100 mg of toxin per liter. Callus growth was reduced as the concentration of FB1 in the culture medium increased, resulting in a significant inhibition at 1.0 mg/L (1.30 M) and higher toxin levels. The micromolar concentrations of each toxin required to cause >50% reduction in growth of corn calli relative to toxin-free controls was 13.0 M for FB1, 102 M for moniliformin, and 215 M for T-2 toxin.

Additional keywords: AAL-toxins, Zea mays.