They also point out that the
middle zone is the one where most of the bamboo
exhibits the largest vascular bundles. However,
in G. angustifolia the largest appear in the inner
zone. The length of the different zones varies with
the species, the diameter and the thickness of the
culm’s wall. Generally, the external third of the
culm’s wall is formed by the periphery and by
the transition zone (Grosser and Liese, 1971).
In G. angustifolia, these two zones only represent
15% of the wall’s thickness, which has a
significant influence on the ultimate composition
of the culm. The concentration of vascular
bundles varies depending on the zone. In G.
angustifolia the periphery and transition zone
have the largest amount of vascular bundles per
unit of area (346-530 vb cm-2) followed by the
middle one (81-194 vb cm-2) and inner zones
(52-96 vb cm-2) (Fig.7; Table 2).
They also point out that themiddle zone is the one where most of the bambooexhibits the largest vascular bundles. However,in G. angustifolia the largest appear in the innerzone. The length of the different zones varies withthe species, the diameter and the thickness of theculm’s wall. Generally, the external third of theculm’s wall is formed by the periphery and bythe transition zone (Grosser and Liese, 1971).In G. angustifolia, these two zones only represent15% of the wall’s thickness, which has asignificant influence on the ultimate compositionof the culm. The concentration of vascularbundles varies depending on the zone. In G.angustifolia the periphery and transition zonehave the largest amount of vascular bundles perunit of area (346-530 vb cm-2) followed by themiddle one (81-194 vb cm-2) and inner zones(52-96 vb cm-2) (Fig.7; Table 2).
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