Lime tree stem, light micrograph

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Lime tree stem, light micrograph

Lime tree stem. Light micrograph of a section through the stem of a lime tree (Tilia europaea). The outer epidermis has been shed and replaced by a layer of cork (dark red). Under the cork is the outer cortex layer of flexible collenchyma tissue (dark blue and red) and a lower cortex of parenchyma (blue). Next is a ring of phloem (blue) with large sieve tubes, companion cells and fibres (pink). The phloem is broken by primary medullary rays (blue, triangular) and thin subsidiary medullary rays (dark blue). Next is a ring of xylem (light pink) with large files of vessels and small woody parenchyma (dark red-brown). There are two yearly growth rings, which have large vessels laid down in the spring and small vessels in the previous autumn. Magnification

Science Photo Library features Science and Medical images including photos and illustrations

Media ID 6339231

© DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Cell Biology Collenchyma Companion Cells Cork Cortex Cytological Cytology Dicot Dicots Dicotyledon Dicotyledons Epidermis Fibre Fibres Growth Ring Histological Histology Layer Layers Lime Tree Microscopy Parenchyma Phloem Pith Primary Xylem Rays Rings Sieve Tube Stain Stained Stem Structural Structures Tissue Tubes Vascular Tissue Vessels Wood Woody Xylem Vessel Cells Light Micrograph Light Microscope Section Sectioned Subsidiary Tilia Europaea

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