Leaching and Binding of Fumonisins in Soil Microcosms

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• 作者：Lonnie D. Williams ; Charles W. Bacon ; Filmore I. Meredith ; Alan J. Franzluebbers ; Roger D. Wyatt ; Mary A. Smith ; and Ronald T. Riley
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2003
• 出版时间：January 29, 2003
• 年：2003
• 卷：51
• 期：3
• 页码：685 - 690
• 全文大小：109K
• 年卷期：v.51,no.3(January 29, 2003)
• ISSN：1520-5118

文摘

Fumonisin B₁ (FB₁) is a water-soluble mycotoxin produced by Fusarium verticillioides. Our researchobjectives were to determine the leaching of FB₁ through soils and FB₁ binding in soil. Leachatecolumns were used to determine the movement of FB₁ through soil. FB₁-contaminated corn screeningsor water extracts containing FB₁ were placed on the surface of soil columns. In 100% sand columns,FB₁ leaching was only slightly retarded, whereas at 50%, 75%, and 100% Cecil sandy loam,approximately 60%, 50%, and 20% of the FB₁ was recovered in the column leachate, respectively.The FB₁ retained on the 100% Cecil sandy loam column was tightly bound. However, approximately75% of the bound FB₁ was released with 5% formic acid and 5% formic acid/acetonitrile (1:1), indicatingthat the nature of the interaction was probably ionic. The results suggest that FB₁ is quite stable insoils and, while tightly bound, under certain environmental conditions could be released.Keywords: Fumonisin B₁; Cecil sandy loam; Fusarium verticillioides; corn