Mahogany wood structure, light micrograph

Mahogany wood structure, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Mahogany wood structure. Polarised light micrograph of a longitudinal tangential section through a woody stem (xylem) of a mahogany (Swietenia sp.) tree, showing the medullary rays (purple circles with yellow walls). These are full of living wood parenchyma cells. In-between the rays are long xylem tracheid cells (green-orange-blue) which are dead but carry water and mineral salts. The section has cut through a xylem vessel (bright orange-yellow walls) showing scalariform (ladder-like) pits for water to pass laterally. Magnification: x46 when printed 10 centimetres wide.

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Keywords: angiosperm, angiosperms, biological, biology, botanical, botany, cell, cell biology, cells, cuticle, cytology, flora, light micrograph, light microscope, lm, longitudinal tangential section, mahogany, medulla, medullary ray, nature, parenchyma, pit, pits, plant, plant structure, polarised light, rays, scalariform, section, sectioned, support, supportive, swietenia sp., tracheid, tracheids, tree, vessel, water transport, xylem

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