Common daisy root, light micrograph

Common daisy root, light micrograph

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Caption: Common daisy root. Light micrograph of a section through the root of a common daisy (Bellis perennis) plant, showing secondary thickening. From outside inwards: layers of cork cells (red); cork cambium (green); phelloderm and cortex of parenchyma (green); pericycle (green ring); ring of outer (primary) and inner (secondary) phloem cells (dark green, small) with sieve tubes and plates (light green); thick layer of cambium cells outside of the xylem (light green); ring of xylem (red). At centre there is no pith but the xylem, primary metaxylem and protoxylem make up of four star-shaped arms of the four medullary rays (green). The primary cambium has produced secondary xylem, in-between the xylem arms to form a ring with very large xylem vessels, wood.

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Keywords: anatomical, anatomy, angiosperm, angiosperms, asteraceae, bellis perennis, biological, biology, botanical, botany, bundles, cambium, cell, cells, common daisy, compositae, cork, cortex, english daisy, flora, histological, histology, inner, lawn daisy, light micrograph, medullary rays, metaxylem, microscope, nature, outer, parenchyma, pericycle, phelloderm, phloem, plant, plants, plate, plates, primary, protoxylem, ray, root, secondary, secondary thickening, section, sectioned, sieve tube, structure, subsidiary root, tissue, tissues, tracheid, tracheids, tubes, vascular bundle, vessel, vessels, white background, wildlife, xylem

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