White oak leaf, light micrograph

White oak leaf, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: White oak leaf. Light micrograph of a section through the midrib of a leaf from a white oak (Quercus alba) tree. This is a typical mesophyte leaf micrograph upper and lower epidermal layers (red-blue), a cuticle and typical stomata, found only on the lower surface. Under the upper epidermis are two layers of palisade mesophyll (red-violet) with chloroplasts. Beneath this is spongy mesophyll (red) with chloroplasts and large inter-cellular spaces. In the middle of the lamina is the midrib, carrying three large veins surrounded by parenchyma (violet), which are themselves surrounded by fibre/sclerenchyma (pink). Inside the top of the veins is the xylem (pink) with large tracheid cells. The lower veins are the phloem, with sieve tubes (small dark blue

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Keywords: anatomical, anatomy, angiosperm, angiosperms, biological, biology, botanical, botany, cell, cells, chloroplast, chloroplasts, cuticle, epidermal, epidermis, flora, histological, histology, lamina, layer, layers, leaf, light micrograph, lower, mesophyte, microscope, midrib, nature, palisade mesophyll, phloem, plant, plants, quercus alba, sclerenchyma, section, sectioned, sieve tube, sieve tubes, spongy mesophyll, stomata, structure, tissue, tissues, tracheid, tracheids, upper, vein, veins, vessel, white background, white oak, wildlife, xylem

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