Phytotoxic effects of fumonisin B1 on maize seedling growth |
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| Authors: | Douglas C Doehlert Clarence A Knutson Ronald F Vesonder |
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| Institution: | (1) Phytoproducts, USDA/ARS, National Center for Agricultural Utilization Research, Peoria, Illinois, USA;(2) Mycotoxin Research Units, USDA/ARS, National Center for Agricultural Utilization Research, Peoria, Illinois, USA;(3) USDA/ARS Wheat Quality Laboratory, Harris Hall, North Dakota State University, 58105 Fargo, ND, USA |
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| Abstract: | Fumonisin B1 toxin is produced by the fungusFusarium moniliforme Sheldon, which is systemic to maize (Zea mays L.) and maize seeds. The effects of zero to 100 parts per million fumonisin B1 on the germination process of maize seeds was determined. The presence of fumonisin had no effect on percent seed germination, but fumonisin inhibited radicle elongation by up to 75% after 48 hours of imbibition. An analysis of amylase secretion in the maize endosperm indicated that fumonisins inhibited amylase production in the germinating seed. Isoelectric focusing of endosperm extracts indicated that secretion of the low pI class of amylases was affected more that other amylase isozymes. The results suggested that the presence of high levels of fumonisin in maize seed may have deleterious effects on seedling emergence. |
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| Keywords: | Amylases Fumonisin Maize Seed germination |
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