Sunflower stem, light micrograph

Sunflower stem, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Sunflower stem. Light micrograph of a transverse section through the stem of a sunflower (Helianthus annuus) plant, showing a vascular bundle. The bundle contains phloem (yellow) and xylem (large blue lumen) cells, which transport carbohydrates and water around the plant respectively. Magnification: x100 when printed at 10 centimetres wide.

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Keywords: biological, biology, botanical, botany, close-up, collenchyma, cross section, cross-section, cuticle, epidermis, flora, helianthus annuus, light micrograph, light microscope, nature, parenchyma, phloem xylem, plant, plant anatomy, sectioned, stem, sunflower, transverse section, vascular bundle

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