Horse chestnut petiole, light micrograph

Horse chestnut petiole, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Horse chestnut petiole. Light micrograph of a section through a horse chestnut (Aesculus hippocastanum) petiole - the stalk of a leaf. The outside of the petiole is the epidermis (red-black). Underneath the epidermis is a layer of cells of collenchyma tissue (violet). Next is a thick cortex of parenchyma cells (light violet), each of which stores starch (yellow). Next a horseshoe-ring of vascular bundles - the top is the phloem (grey-yellow), with sieve tubes and plates. Next the xylem (brown). The tissue at the centre is more parenchyma (grey), which is also full of starch (yellow). Magnification: x7 when printed 10 centimetres wide.

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Keywords: aesculus hippocastanum, anatomical, anatomy, angiosperm, angiosperms, biological, biology, botanical, botany, bundles, cell, cells, collenchyma, cortex, epidermal, epidermis, flora, histological, histology, horse chestnut, leaf, light micrograph, microscope, nature, parenchyma, petiole, phloem, plant, plants, plates, section, sectioned, sieve plate, sieve tube, stalk, starch, structure, tissue, tissues, tubes, vascular bundle, white background, wildlife, xylem

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