Fig. 6
From: Reaction wood anatomy and lignin distribution in Gnetum gnemon branches
Visible-light absorption spectra of secondary walls of tracheids, fiber tracheids and vessels after Mäule and phloroglucinol–HCl colour reactions in Gnetum gnemon. ‘A’, ‘B’ and ‘C’ in the figures correspond to sample codes. Solid and dotted lines indicate the upper and lower sides, respectively. Arrowheads in the figure indicate the absorbance at 520 and 550 nm for Mäule and phloroglucinol–HCl reactions, respectively