Broad bean flower,light micrograph

Numéro d’image : 11619035
Broad bean flower,light micrograph
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
Licence : Droits gérés
Crédit: Science Photo Library / Wheeler, Dr. Keith
Taille de l’image : 5125 px × 3417 px
Model Release : Non requis
Restrictions : -

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