Sage stem, light micrograph

Sage stem, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Sage stem. Light micrograph of a section through a secondary stem of a scarlet sage (Salivia splendens) plant. The outer stem is covered with a thin epidermis and thick cuticle (red), but is thicker at the four corners forming cork (brown). It also contains stomata, and trichomes. Under the epidermis, at the corners, is a layer of flexible collenchyma (dark red) for support. Next is the cortex (red), with an inner pericycle of parenchyma tissue (brown). Next, the vascular bundles (dark brown and red) consist or rings an outer layer of phloem (dark red) and inner xylem (light and dark brown) tissue, with cambium tissue (light red) in-between. At the centre of the stem is a pith (red) of parenchyma. Magnification: x5 when printed 10 centimetres

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Keywords: angiosperm, angiosperms, biological, biology, botanical, botany, bundle, cambium, cell, cell biology, cells, close-up, collenchyma, cork, cortex, cut out, cut outs, cut-out, cut-outs, cuticle, cutout, cutouts, cytological, cytology, detail, dicot, dicots, dicotyledon, dicotyledons, epidermis, histological, histology, layer, layers, light micrograph, light microscope, microscopy, parenchyma, pericycle, phloem, pith, plant, plants, sage, salivia splendens, scarlet sage, secondary stem, section, sectioned, stain, stained, stomata, structural, structure, structures, tissue, trichome, trichomes, vascular bundle, vessel, vessels, white background, xylem

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