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Although the formation of intercellular spaces in compressin wood has been reported by a few researchers, there are still problem areas. In this study, the intercellular spaces in compression wood for...med in a leaning stem of Pinus thunbergii parl. were observed with a light microscope and a scanning electron microscope. The results are summarised as follows; 1. In a transverse disc of leaning stem, the intercellular spaces are generally observed in the area as shown in Fig. 1. 2. The tracheid characteristics have an effect on the intercellular space appearance in the transverse and longitudinal sections. 3. In the transverse section, the intercellular spaces amount to about 2.5 per cent of the area of compression wood. 4. The small apertures which seem to interconnect between tracheid lumina and intercellular spaces are found. 5. The membraneous structures which are considered as the mother-cell walls are observed everywhere in the intercellular spaces. 6. The intercellular spaces are formed at the early stage of differentiating of compression wood cells.show more
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