Translocation of Sphingoid Bases and Their 1-Phosphates, but Not Fumonisins, from Roots to Aerial Tissues of Maize Seedlings Watered with Fumonisins

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• 作者：Nicholas C. Zitomer ; Samantha Jones ; Charles Bacon ; Anthony E. Glenn ; Thomas Baldwin ; Ronald T. Riley
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2010
• 出版时间：June 23, 2010
• 年：2010
• 卷：58
• 期：12
• 页码：7476-7481
• 全文大小：770K
• 年卷期：v.58,no.12(June 23, 2010)
• ISSN：1520-5118

文摘

In an earlier study using maize seedlings grown from kernels inoculated with Fusarium verticillioides, fumonisin B₁ (FB₁) was preferentially accumulated in leaf tissue compared to FB₂ and FB₃. The present study tested whether maize seedlings preferentially translocate FB₁ when plants are watered with FB₁ and/or FB₂, without the fungus present. The results show that neither FB₁ nor FB₂ was translocated when administered in the watering solution, and although both FB₁ and FB₂ were taken up by the roots, the accumulation of FB₂ in roots was significantly less than expected, indicating that FB₁ was preferentially accumulated. In addition, there was clear evidence of ceramide synthase inhibition in the roots and sphingoid base and sphingoid base 1-phosphates accumulated in leaf tissue presumably due to translocation from the roots. These findings suggest that the fungus−plant interaction is necessary for FB₁ translocation in maize seedlings infected with F. verticillioides.