Abstract
The wood ofBridelia retusa of the family Euphorbiaceae is nonstoried and diffuse porous. The axial parenchyma is vasicentric. Ray parenchyma is heterocellular and uniseriate or multiseriate. Fibres are enucleate and septate. The sapwood is light yellow and heartwood is greyish. The innermost sapwood is the transition zone. All the constituent cells of the heartwood are dead. Nucleus is present in both axial and ray parenchyma cells of the sapwood and transition zone. Tyloses are absent in the vessels of sapwood but are frequent in the transition zone and heartwood. Parenchyma cells and some vessels in the heartwood show accumulation of extractives. Starch and lipids are present in both axial and ray parenchyma cells of the sapwood. Peroxidase activity is detected in the xylem near the cambial zone. Acid phosphatase activity is prominent in the middle sapwood. Succinate dehydrogenase activity is maximum in the outermost sapwood.
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