Germinating goldenrod pollen grain

Germinating goldenrod pollen grain

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Credit: DEE BREGER & ANDREW LEONARD/SCIENCE PHOTO LIBRARY

Caption: Pollen germination. Coloured scanning electron micrograph (SEM) of a pollen grain on the stigma of the goldenrod flower (Solidago sp. ). The stigma (orange) is the female pollen-receiving structure of the flower. The germinating pollen grain (yellow) grows a pollen tube (upper centre) through the stigma, down the style and into the ovary where it releases male gametes for fertilization of the egg cell. Production of a seed then follows. Goldenrod pollen grains are insect-borne, the spikes on the grain aid attachment to the carrying insect. Magnification: x651 at 6x6cm size.

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Keywords: botany, coloured sem, germination, goldenro, goldenrod, nature, plant, plants, pollen, pollen tube, reproduction, reproductive, solidago sp., stigma, type

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