Fig. 1.

Structural diversity of xylan in the main groups of land plants. The figure shows characteristic structural motifs of xylans from representative members of the plant group based in data described in the literature* (Haghighat et al., 2016, Scheller and Ulvskov, 2010, Smith et al., 2017). Not all xylan side chains identified are represented in the figure. The abbreviation used are FA, Ferulic acid; pCA, p-Coumaric acid; Ac, Acetyl group. *Gymnosperms do not have acetylated xylan with the exception of some Gnetophytes.