Abstract:
This research aimed to analyze variation of the anatomical characteristics (cell dimension and proportion) in axial and radial direction of Acacia aulacocarpaplanted in Indonesia. Three trees of 27-year-old A. aulacocarpaplanted in Gunung Kidul Yogyakarta were used. This research covered a completely randomized design with two factors, the axial direction (base, middle, and top of the stem) and the radial direction (near pith, middle, andnear bark) in triplicate. A two-way analysis of variants was used. The measured parameterswerefiber dimensions (length, diameter, lumen diameter, and wall thickness) and cell proportions(fiber, vessel, ray parenchyma, and axial parenchyma). The results showed that average value of fiber dimensions was as follow: fiber length 0.94 mm; fiber diameter 17.43 μm; fiber lumen diameter 11.75 μm; and cell wall thickness 2.84 μm. The average value of cell proportions was 52.48% of fibers cell proportion; 17.5% of vessel cell proportion; 15.69% of axial parenchyma cell proportion; and 16.68% of ray cell proportion. The axial direction factor does not affect the proportion and dimensions of the fiber. However, the radial direction factor affects the proportion of fiber cells, the proportion of vessel cells, the proportion of axial parenchyma cell, fiber length, fiber lumen diameter, and cell wall thickness. Fiber length, fiber lumen diameter, cell wall thickness increased from near the pith to the middle and then remained relatively constant toward the bark. Based on these results, it is suggesting that themiddle and near the bark are mature wood.
SDGs:
SDG 15:Life on Land
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