Dry weight losses of two transgenic poplar lines and the WT incubated with brown rot fungi G. trabeum, C. puteana, and P. placenta. Samples were incubated for 4, 8, 12, or 16 weeks (n = 5). Lines 64 and 82 have very high and high S/G ratios relative to that of the WT. Error bars represent standard deviations. Asterisks denote significant differences compared to the WT (P < 0.01).