Marrow stem, light micrograph

Marrow stem, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Marrow stem. Light micrograph of a section through the stem of a marrow (Curcurbita sp.), showing the sieve plates in the phloem. A single collateral vascular bundle can be seen. This has an outer and inner phloem (bluish-yellow) with large sieve tubes some of which show sieve plates and companion cells, with an inner xylem (crimson) with large vessels and small woody parenchyma. The cambium (light blue, small cells) is in-between the phloem and xylem. Surrounding the bundle is the ground tissue parenchyma (yellow). Magnification: x37, when printed 10 centimetres wide.

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Keywords: angiosperm, angiosperms, biological, biology, botanical, botany, cambium, cell, cell biology, cells, collateral, curcurbita sp., cytological, cytology, dicot, dicots, dicotyledon, dicotyledons, ground tissue, histological, histology, inner, light micrograph, light microscope, marrow, microscopy, outer, parenchyma, phloem, plant, plants, plates, section, sectioned, sieve plate, sieve tube, stain, stained, stem, structural, structure, tissue, tubes, vascular bundle, xylem

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