Pollen grain of Sycamore tree

Pollen grain of Sycamore tree

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Credit: POWER AND SYRED/SCIENCE PHOTO LIBRARY

Caption: Pollen grain. Coloured scanning electron micrograph (SEM) of pollen grains of the Sycamore tree, Acer pseudoplatanus. They are slightly triangularly shaped with coat ornamentation. When a Sycamore pollen grain (which contains the male gametes) lands on the stigma of a Sycamore flower, it germinates. A pollen tube will grow out of the pollen grain into the stigma, and down this tube the male "nuclei" will travel towards the ovaries. When an ovule in the ovary is then fertilized, a seed is formed. Magnification: x1,100 at 5x7cm size. x2840 at 8x6"

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Keywords: acer pseudoplanatus, botany, nature, plant, plants, pollen, reproduction, reproductive, sycamore pollen

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