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Effect of Fusarium head blight caused by F. graminearum (dotted lines) and F. culmorum (solid lines) on maximal fluorescence of dark-adapted spikelets [Fm] (a), maximal photochemical efficacy of photosynthesis II [Fv/Fm] (b), and photochemical quantum yield Y [II] (c) in comparison to non-inoculated control (bold solid lines). Spikes were spray inoculated at GS 61–65. Tukey’s HSD, P ≤ 0.05 (mean ± SE; n = 6). n.s., not significantly different.
