Medlar leaf, light micrograph

Medlar leaf, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Medlar leaf. Light micrograph of a section through the midrib of a leaf from a wild sage (Salvia nemorosa) plant. This is a typical xerophyte leaf, adapted for arid conditions. It consists of an upper (red) and lower epidermis (blue) with a cuticle and trichomes (hairs) to prevent water vapour escaping. Under the upper epidermis are two layers of palisade mesophyll (red and blue) with chloroplasts. Beneath this is the spongy mesophyll (red; round) with chloroplasts and large inter-cellular spaces. The lower epidermis is thin with many stomata (pores). In the middle of the lamina is one single large vein (the horseshoe midrib) under which, the two epidermal layers consists of thick-walled cells, the collenchyma (black-blue), and a ring of parenchyma

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Keywords: adaptation, adaptations, anatomical, anatomy, angiosperm, angiosperms, arid adapted, arid-adapted, biological, biology, botanical, botany, cell, cells, chloroplast, chloroplasts, cuticle, drought tolerant, drought-tolerant, epidermal, epidermis, flora, hair, hairs, histological, histology, lamina, layer, layers, leaf, light micrograph, lower, microscope, midrib, nature, palisade mesophyll, phloem, plant, plants, sclerenchyma, section, sectioned, sieve tube, sieve tubes, spongy mesophyll, stomata, structure, tissue, tissues, tracheid, tracheids, trichome, trichomes, upper, vein, veins, vessel, white background, wildlife, xerophyte, xylem

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