Marrow stem, light micrograph

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Marrow stem, light micrograph

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 (blue) with large sieve tubes some of which show sieve plates (dotted blue) and companion cells, with an inner xylem (pale orange) with large vessels and small woody parenchyma. The cambium, made up of small cells in-between the phloem and xylem, has broken down. Surrounding the bundle is the ground tissue parenchyma (violet). At upper right is the epidermis (blue) and underneath is a band of supporting fibres (pale orange). Magnification: x37, when printed 10 centimetres wide

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Media ID 6339541

© DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Cambium Cell Biology Cytological Cytology Dicot Dicots Dicotyledon Dicotyledons Epidermis Ground Tissue Histological Histology Marrow Microscopy Outer Parenchyma Phloem Plates Sieve Plate Sieve Tube Stain Stained Stem Structural Tissue Tubes Vascular Bundle Xylem Cells Collateral Light Micrograph Light Microscope Section Sectioned

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