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New Zealand Journal of Forestry Science
Fig. 1 | New Zealand Journal of Forestry Science

Fig. 1

From: Cell organelles and fluorescence of parenchyma cells in Eucalyptus bosistoana sapwood and heartwood investigated by microscopy

Fig. 1

Histochemical staining of ray parenchyma in sapwood (top row) and heartwood (bottom row) from an 11-year-old E. bosistoana tree. Starch granules were stained black with iodine/potassium iodide in radial (white arrows) and axial (black arrows) parenchyma of sapwood but were absent in heartwood (a, d). Proteins and vacuoles (arrows) were labelled bluish-black with amido black in sapwood but were absent from heartwood (b, e). Vacuoles (arrows) labelled bluish with toluidine blue in parenchyma of sapwood but were absent or breaking down in heartwood (c, f). Round structures (arrows) in heartwood (d, e, f) were likely heartwood extracts synthesised in ray parenchyma cells. These round structures were not evident in sapwood. Scale bar 20 μm

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