Figure 8.

Phenolic metabolite accumulation in potato lines post-wounding, Targeted analysis of (A) p-coumaroyl tyramine, (B) caffeic acid, (C) chlorogenic acid, (D) caffeoyl putrescine, (E) feruloyl putrescine, and (F) feruloyl tyramine was used to quantify soluble polar metabolites extracted from wound-healing potato tubers from EV, StFHT-, and St-HCT-RNAi lines. There were no statistical differences in the number of soluble phenolics between independent lines within EV, StFHT-RNAi, and StHCT-RNAi. Native and wound periderm for five independent EV lines were pooled and analyzed. For StFHT-RNAi and StHCT-RNAi lines, five replicates from each of three independent lines were pooled (n = 15). Relative data (normalized to EV set at 1; dashed lines) are plotted on a log₂ scale. Data were analyzed using a two-way ANOVA, followed by a Holm–Šídák’s multiple comparisons test. Different letters above bars indicate significant differences (p = 0.05). ND = not detected.