SEM of pollen from daisy, Bellis perennis

SEM of pollen from daisy, Bellis perennis

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Credit: R.E.LITCHFIELD/SCIENCE PHOTO LIBRARY

Caption: Scanning electron micrograph of a single pollen grain of a common Daisy, Bellis perennis. The outer wall (exine) has a germinal pore and many small projections, these get caught in the body hairs of insects. The insects then fly to other flowers to feed and so pollen is transferred. When the pollen grain, containing the male gametes, lands on the stigma of a flower, it germinates. A pollen tube grows out from the germinal pore, down through the stigma, to the ovary. The male nuclei pass down the tube, fertilize the ovules & a seed is formed. Magnification: x5900 (at 10x8 size).

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Keywords: bellis perennis, botany, daisy, nature, plant, plants, pollen, reproduction, reproductive, type

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