Pea flower pollination, SEM

Pea flower pollination, SEM

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Caption: Pea flower pollination. Coloured scanning electron micrograph (SEM) of pollen grains (yellow) on the stigma of a garden pea flower (Pisum sativum). The pollen grains, which contain male genetic material, have become trapped by the stigma's papillae (hair-like structures, green). The stigma is part of the female reproductive structure (pistil), which is formed from one or more carpels. Each carpel consists of a stigma, a style and an ovary (not seen). If the female sex cells (ovules) in the ovary become fertilised by the pollen grains' male sex cells, the carpel may ripen to produce a fruit containing seeds. Magnification: x80 at 6x7cm size.

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Keywords: botany, carpel, coloured, english, female, garden, grains, nature, papilla, papillae, pea, pistil, pisum sativum, plant, plants, pollen grain, pollination, reproduction, reproductive, scanning electron micrograph, sem, stigma, structure

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