Sunflower stem, light micrograph

Sunflower stem, light micrograph

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Credit: BIOPHOTO ASSOCIATES/SCIENCE PHOTO LIBRARY

Caption: Light micrograph of a transverse section through the stem of a sunflower (Helianthus annuus), showing secondary thickening. This is the development of a protective cork cambuim outer layer that adds girth to the stem.

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Keywords: angiosperm, bast fiber, bast fibre, biological, biology, botanical, botany, cortex, dicot, dicotyledon, dracaenoid thickening, epidermis, eudicot, eudicotyledon, flora, helianthus annuus, light micrograph, light microscope, lm, nature, no-one, nobody, phloem, plant, plant anatomy, plant histology, plantae, sclerenchyma, secondary thickening, section, sectioned, stem, sunflower, transverse section, vascular bundle, vascular tissue, woody tissue, xylem

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