Sweet pea flower pollination, SEM

Sweet pea flower pollination, SEM

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Caption: Sweet pea pollination. Coloured scanning electron micrograph (SEM) of pollen grains (yellow) on the stigma (green) of a sweet pea flower (Lathyrus odoratus). 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: x170 at 6x7cm size.

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Keywords: botany, carpel, coloured, female, flower, grains, lathyrus odoratus, nature, papilla, papillae, pistil, plant, plants, pollen grain, pollination, reproduction, reproductive, scanning electron micrograph, sem, stigma, structure, sweet pea

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