Fumonisin Production and Bioavailability to Maize Seedlings Grown from Seeds Inoculated with Fusarium verticillioides and Grown in Natural Soils

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• 作者：Lonnie D. Williams ; Anthony E. Glenn ; Charles W. Bacon ; Mary A. Smith ; and Ronald T. Riley
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2006
• 出版时间：July 26, 2006
• 年：2006
• 卷：54
• 期：15
• 页码：5694 - 5700
• 全文大小：172K
• 年卷期：v.54,no.15(July 26, 2006)
• ISSN：1520-5118

文摘

The fungus Fusarium verticillioides infects maize and produces fumonisins. The purpose of this studywas to determine the ability of F. verticillioides to produce fumonisins in synthetic and natural soilsand their biological availability to maize roots. Maize seeds were inoculated with a pathogenic strainof F. verticillioides (MRC826) and planted in synthetic and three different natural soils. There werestatistically significant reductions in stalk weight and root mass and increased leaf lesions in theMRC826-treated seedlings in all soil types. Fumonisins were detected in all of the soils of seedlingsgrown from MRC826-inoculated seeds. The fumonisin produced in the soils was biologically availableto seedlings as demonstrated by the statistically significant elevation of free sphingoid bases andsphingoid base 1-phosphates in their roots. These results indicate that F. verticillioides producedfumonisins in the autoclaved synthetic and natural soils and that the fumonisin produced is biologicallyavailable on the basis of evidence of inhibition of ceramide synthase.Keywords: Fumonisin; Fusarium verticillioides; maize; seedling disease