Production of fusaric acid by Fusarium species
1996
Bacon, C.W. | Porter, J.K. | Norred, W.P. | Leslie, J.F.
Fusaric acid is a mycotoxin with low to moderate toxicity, which is of concern since it might be synergistic with other concurring mycotoxins. Fusaric acid is widespread on corn and corn-based food and feeds and is frequently found in grain, where Fusarium spp. are also isolated. We surveyed 78 strains of Fusarium moniliforme, F. crookwellense, F. subglutinans, F. sambucinum, F. napiforme, F. heterosporum, F. oxysporum, F. solani, and F. proliferatum for their ability to produce fusaric acid. Strains in Fusarium section Liseola also were assigned to mating population of the Gibberella fujikuroi species complex. The fungi could be divided into three classes, low (< 100 microgram/g), moderate (100 to 500 microgram/g), and high (> 500 microgram/g), based on the amounts of this mycotoxin produced in culture on autoclaved corn. Strains of mating populations C from rice consistently produced moderate to high concentrations of fusaric acid. Two isolates, one each from mating populations C and D, produced fusaric acid in excess of 1,000 microgram/g of corn. No isolates of any of the Fusarium species examined were negative for the production of fusaric acid on autoclaved corn.
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