Broad bean flower, light micrograph

Broad bean flower, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Broad bean flower. Polarised light micrograph of a section through a flower from a broad bean (Vicia faba) plant, showing the stamens and stigma. The central style (black and orange) tapers to a tip (red and white) to produce the sponge-shaped stigma with hairs on the underside which trap pollen grains (red) from its own pollen to stop self-pollination. The stamens are fused below into a tube, but the tubular filaments (blue and orange with red spots) are free at their ends and lead to the anthers (dark, orange-spotted). The anthers have pollen sacs, which have split to release their pollen grains. Magnification: x5 when printed 10 centimetres wide.

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Keywords: androecium, angiosperm, angiosperms, anther, anthers, biological, biology, botanical, botany, broad bean, cell, cell biology, cells, close-up, cytological, cytology, detail, dicot, dicots, dicotyledon, dicotyledons, female, filament, filaments, flower, fused, grains, gynaecium, histological, histology, light micrograph, light microscope, male, microscopy, plant, plants, polarised light, pollen grain, pollen sac, reproductive structure, sacs, section, sectioned, stain, stained, stamen, stamens, stigma, structural, structure, structures, style, tissue, vicia faba, white background

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