|Hojilla-Evangelista, Milagros - Mila|
|Dunn, Robert - Bob|
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 12/8/2019
Publication Date: 12/10/2019
Citation: Hay, W.T., Vaughan, M.M., McCormick, S.P., Berhow, M.A., Bowman, M.J., Hojilla-Evangelista, M.P., Dunn, R.O., Teresi, J.M. 2019. Moderately resistant wheat cultivars lose nutritional quality at elevated CO2 altering Fusarium graminearum growth and mycotoxin production. Meeting Abstract. [abstract].
Technical Abstract: Increased photosynthetic carbon assimilation rate in C3 crops, such as wheat, at elevated atmospheric CO2 concentrations can dramatically alter grain nutritional quality. Typically, growth at elevated CO2 leads to grain with higher carbohydrate content which in turn also significantly alters the protein, mineral and lipid compositions. This investigation explores how changes in wheat primary metabolism due to elevated CO2 affects F. graminearum growth and DON production. We observed a significant decline in wheat nutritional quality when grown under elevated CO2, most severely in the moderately resistant Alsen cultivar. The change in nutritional composition resulted in less Fusarium graminearum fungal growth, but an increased production of the mycotoxin deoxynivalenol (DON) per unit fungal biomass. Additionally, we evaluated fifteen wheat cultivars and found the moderately resistant cultivars have the most protein and mineral nutrient loss when grown at elevated CO2.