Shepherd's purse seed, light micrograph

Shepherd's purse seed, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Shepherd's purse seed. Light micrograph of a longitudinal section through a seed of the shepherd's purse (Capsell bursa-pastoris), showing the embryo in the seed. The seed coat (testa) is a single layer of thick-walled cells covered with a thick cuticle. The embryo (bottom) has a large basal cell (white), a basal radical (above the white basal cell), then a short stalk (hypocotyl), then the top of the shoot (plumule, very small). Most of the seed consists of the large lamella-like cotyledons (pink), the first seed leaves. Magnification: x45 when printed at 10 centimetres high.

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Keywords: anatomical, biological, biology, botanical, botany, capsell bursa-pastoris, cell, cells, cellular, flora, internal structure, light micrograph, light microscope, lm, longitudinal, nature, part, parts, plant, plant anatomy, section, sectioned, seed, shepherd's purse, structural, tissue, white background

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