Female pine cone scale, light micrograph

Female pine cone scale, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Female pine cone scale. Light micrograph of a section through a scale from a young ovulate female Scot's pine (Pinus sylvestris) cone, bearing an ovule (upper right). Each scale supports a lower basal bract scale (top). On the upper ovuliferous scale there is a basal bare ovule (central oval with white space), surrounded by the integument and nucellar tissue (around the ovule), which is pierced by a tube, the micropyle, that enables the pollen to reach the top of the archegonium (circular brown cells) where the egg (ovum) will reside. Magnification: x37 when printed 10 centimetres wide.

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Keywords: 1, archegonium, basal bract, biological, biology, botanical, botany, cell, cell biology, cells, close-up, cone, cytological, cytology, detail, female, gymnosperm, gymnosperms, histological, histology, integument, light micrograph, light microscope, micropyle, microscopy, nucellar tissue, one, ovulate, ovule, ovules, ovuliferous, pinus sylvestris, plant, plants, reproductive structure, scale, scales, scot'ss pine, scots, section, sectioned, single, stain, stained, structural, structure, structures, tissue, tree, white background

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