Figure 3

Percent grain protein of various Fusarium head blight (FHB) moderately resistant (MR) and susceptible wheat cultivars. Change in protein content determined by evaluating differences in grain protein from wheat grown at elevated CO₂ (e[CO₂]), compared with wheat grown at ambient (a[CO₂]). (a) Grain protein content of susceptible and MR wheat grain grown at a[CO₂] and e[CO₂], error bars represent standard error. (b) Percent change in protein content at e[CO₂] by cultivar and FHB resistance score. Horizonal bars represent group mean protein loss. Wheat cultivars were ordered by FHB resistance score at the top of the figure panel. (c) Percent change in protein content by FHB group. Different letters or asterisks (*) denote statistically significant differences as determined by a Tukey adjusted generalized mixed model analysis of variance (P < 0.05); MR (n = 27), and susceptible (n = 18), for each CO₂ growth condition.