Fig. 4

Ratios of H/G and S/G units in developing culms of S. tootsik. Ratios of a H/G and b S/G units of lignin released by thioacidolysis. H/G ratio was not calculated for mid-May sample or 6th, 8th, and 10th internodes of late-May sample, because H monomers were not detected. See Table 1 for sampling details. Data are mean ± SD of three biological replicates