Figure 7.

Mean percentage of prodelphinidins in total PA in MYB134- and MYB115-overexpressing transgenic Populus plants. The composition of PA was quantified by UPLC-MS/MS as described in “Materials and Methods.” Data for multiple independent transgenic lines in both hybrid backgrounds (P. tremula × P. tremuloides and P. tremula × P. alba) are shown. All transgenic lines are significantly different from their respective wild-type (WT) controls (P < 0.05, Student’s t test), with P. tremula × P. alba MYB115 line 1 approaching significance (P = 0.055). Error bars indicate se; n = 3 or 4 for all transgenic lines.