Germination of turnip pollen

Germination of turnip pollen

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Caption: False-colour scanning electron micrograph (SEM) showing the germination of a pollen grain on the stigma of a turnip flower, Brassica campestris. A pollen tube has grown out of the pollen grain at centre; the tube grows down into one of the finger-like projections that form the stigma, through the style (the column that supports the stigma), to reach the ovaries at the base of the style. The tube protects & conveys two male gametes, or sperm cells, which it releases into an ovule (egg) to produce fertilisation. Magnificat- ion: x410 at 35mm size, x2870 at 8x10-inch size. The false colour has been added by a photographic process called Colorvir. Ref: MICROCOSMOS, fig. 4.1, page 66 Colorvir version of BW print B786/99M.

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Keywords: botany, brassica campestris, germinating, nature, plant, plants, pollen, reproduction, reproductive, sem, stigma, tube, turnip, type

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