Pine stem, light micrograph

Pine stem, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Pine stem. Light micrograph of a section through the stem of a pine (Pinus sp.) tree, showing tracheid cells (white-brown) in the xylem tissue. There are thin files of parenchyma and tracheid cells (orange-white) of the subsidiary medullary rays, which pass food substances radially. Many of the tracheid cell walls have bordered pits (circles) that pass water and minerals side-ways. Magnification: x70 when printed 10 centimetres wide.

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Keywords: autumn, biological, biology, bordered pit, botanical, botany, cell, cell biology, cells, close-up, cytological, cytology, detail, growing, growth ring, gymnosperm, gymnosperms, histological, histology, light micrograph, light microscope, medullary rays, microscopy, parenchyma, pine, pinus sp., pits, plant, plants, ray, section, sectioned, spring, stain, stained, stem, structural, structure, structures, subsidiary ray, tissue, torus, tracheid, tracheids, tree, trunk, vessel, vessels, wood, xylem tissue

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