Fusarochromanone production by Fusarium isolates |
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Authors: | W D Wu P E Nelson M E Cook E B Smalley |
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Institution: | Department of Plant Pathology, University of Wisconsin, Madison 53706. |
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Abstract: | Sixty two Fusarium isolates representing nine species from many parts of the world were screened for fusarochromanone production. A simplified method for the detection of fusarochromanone in culture filtrates or grain cultures was used. Under UV irradiation (364 nm) the chloroform phase from fusarochromanone-positive culture extracts fluoresced a characteristic bright blue color. Results were confirmed by thin-layer-chromatography comparison with pure fusarochromanone standards. Detection was possible in cultures as young as 1 week old. Biosynthesis of fusarochromanone was rare in Fusarium spp. and was only detected in three isolates of Fusarium equiseti, namely R-4482 (barley Federal Republic of Germany]), R-6137 (barley Alaska]), and R-8508 (potato Denmark]), among all the isolates tested from various geographic sources. |
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