Figure 3.

UV spectra (a–c) and antioxidant capacity (d) of metabolite extracts from tobacco leaves. Leaves were primed with the phyto-courier or control solutions prior to agroinfiltration. The relative accumulation of flavonoids was determined by considering the peak at 329 nm (a–c). Average antioxidant capacity from four replicates including standard deviation is expressed as µmol of Fe²⁺ equivalents (eq) per g of leaf sample. Letters indicate significance at p-value < 0.05 determined with an ANOVA one-way analysis followed by Tukey’s post hoc test (F(5) = 2.017, p-value = 0.125).