Fig. 1

Overview of average FTIR spectra from Col-0, wsr1–1, wsr2–1, wsr3–1 and wsr4–1 seedlings. The grey dotted line represents the average spectrum of Col-0 (grey y-axis label). The different colored lines for wsr1–1 (orange), wsr2–1 (yellow), wsr3–1 (green) and wsr4–1 (blue) show the difference spectra obtained by subtraction of respective mutant average spectra from the Col-0 average spectrum (black y-axis label). Black lines indicate 2 x SD for Col-0 derived material. Numbers in red indicate bands in the infrared spectra of plant cell wall material acting as indicators for certain classes of cell wall polysaccharides. For comparison with the full set of mutants see Additional file 1: Figure S2