Pollen of London Pride flower

Pollen of London Pride flower

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Credit: R.E.LITCHFIELD/SCIENCE PHOTO LIBRARY

Caption: False-colour scanning electron micrograph of a pollen grain of London Pride, Saxifraga spathularis. This is an oval-shaped grain, about 33 micrometres long, with an intricately ridged outer wall. The ridges are dotted with wart-like processes; between the ridges are grooves or striae. Running along the length of the grain is a deep groove called the germinal furrow. When the pollen grain, containing the male gametes, lands on the stigma of the flower it germinates. A pollen tube grows out of the furrow, down through the stigma, to the ovary. The male nuclei pass down the tube, fertilize the ovules & a seed is formed. Magnification: x860 at 35mm size.

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Keywords: botany, london pride, nature, plant, plants, pollen, reproduction, reproductive, saxifraga, saxifraga spathularis, type

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