Location: Crop Bioprotection ResearchTitle: Determination of ferulated sugars with activity against insect and fungal pests of maize
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 6/9/2020
Publication Date: 8/17/2020
Citation: Dowd, P.F., Berhow, M.A., Vermillion, K., Johnson, E.T. 2020. Determination of ferulated sugars with activity against insect and fungal pests of maize. Meeting Abstract. [abstract].
Technical Abstract: Mechanisms of leaf and kernel resistance in sorghum and maize have been extensively investigated, but less information is known about stalk resistance mechanisms. Pith from low lignin mutant bmr6 of sorghum caused much higher mortality of corn earworms and fall armyworms compared to pith from wild type plants. Freeze dried pith was extracted with methanol and fractionated. Multiple fractions had activity against insects. LC-ESI-MS characterization indicated that glucose and sucrose derivatives of ferulate, which were sometimes acetylated, were the principle components, but positive identity could not be determined. Large scale fractionation and purification followed by NMR was used to further characterize the components in the active fractions. Further activity against insects and plant pathogens was determined. Representative maize lines with varying stalk resistance to insects and plant pathogens were also examined for these compounds.