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Shepherd's purse seed, light micrograph

Shepherd's purse seed, light micrograph

C003/5480

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Credit

DR KEITH WHEELER / SCIENCE PHOTO LIBRARY 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.

Release details

Model release not required. Property release not required.

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