False-col SEM of pollen of Pink Heather

False-col SEM of pollen of Pink Heather

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Caption: False-colour scanning electron micrograph of pollen of Pink Heather, Erica carnea. The pollen grains combine in groups of four in the form of a tetrahedron, known as a tetrad. The outer wall (exine) of each grain is highly sculptured & has three shallow depressions. At the boundaries between the grains are deep grooves, called germinal furrows. When the pollen, containing the male gametes, lands on the stigma of a flower, it germinates. A pollen tube grows out of the germinal furrow, down through the stigma, to the ovary. The male nuclei pass down the tube, fertilize the ovules & a seed is formed. Magnification: x665 at 35mm size. Gold tint. Reference: MICROCOSMOS, figure 4.34, page 82.

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Keywords: botany, erica carnea, heather, nature, pink heather, plant, plants, pollen, reproduction, reproductive, type

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