Fig. 5.

Light micrographs of transverse sections of Melia azedarach collected in July. (A, B) Phloem fibres stained with Azur II and methylene blue showing the presence of gelatinous (G)-layers on the tension side (A). (C, D) Fluorescence micrographs of transverse sections of the same phloem fibres shown in (A) and (B) after staining with acriflavine. G-layers contained less lignin (C). (E, F) Polarizing light micrographs of transverse sections of the same phloem fibres shown in (A) and (B). Microfibrils in G-layers arranged almost parallel to the fibre axis (E). (A, C, E) Tension side; (B, D, F) opposite side. G, G-layers; L, lignified layers.