Fig. 5

Total lignin content and S/G ratio of P. deltoides PtGAUT12-OE lines compared to controls. A Total lignin content and B S/G ratio of P. deltoides WT, vector control, and PtGAUT12.1-OE lines. Data are mean ± SE. n = 25 for WT, n = 120 for vector control (eight different insertion vector control lines, each with n = 15, see Additional file 2 for the full dataset), and n = 10–15 for PtGAUT12.1-OE lines, *P < 0.05, **P < 0.001. Statistical analysis was by one-way analysis of variance (ANOVA) followed by Tukey’s multiple comparison test using Statistica 5.0