Bindweed pollen grains, SEM

Bindweed pollen grains, SEM

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This image is part of the sequence Pollen app (pollen)

Credit: POWER AND SYRED/SCIENCE PHOTO LIBRARY

Caption: Pollen grains. Coloured scanning electron micrograph (SEM) of bindweed (Calystegia sepium) pollen grains (blue). There is great variation in the size, shape and surface texture of pollen. The often highly-sculpted outer wall (exine) may help in pollen dispersal. Each pollen grain supplies a male gamete (male sex cell) that can fertilise the female gamete in an ovule that will develop into a plant seed. Magnification: x580 at 6x7cm size.

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Keywords: allergen, allergy, bind, bindweed, botanical, botany, calystegia sepium, cell, cells, coloured, exine, false, gamete, gametes, grain, grains, hayfever, hedge, male, nature, plant, plants, pollen, reproduction, reproductive, scanning electron micrograph, sculpted, sculpting, sem, sex, sexual, structure, vine, wall, weed

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