Red Clover pollen. Coloured scanning electron micrograph (SEM) of pollen grains of Red Clover, Trifolium pratense. The outer wall (exine) of each grai

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Red Clover pollen. Coloured scanning electron micrograph (SEM) of pollen grains of Red Clover, Trifolium pratense. The outer wall (exine) of each grain has a netted ornamentation, and there are grooves called germinal furrows. These pollen grains are wind dispersed. When a pollen grain, containing the male gametes, lands on the stigma of a flower, it germinates. A pollen tube grows out from the furrow, down through the stigma, to the ovary. The male nuclei pass down this tube, fertilize the ovules and seeds are formed. Magnification: x1,425 at 5x7cm size.

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Size: 3500px × 2428px
Photo credit: © POWER AND SYRED/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: botany, circular, clover, dispersed, grains, gray, grey, multiple, nature, plant, plants, pollen, pratense, red, reproduction, reproductive, rounded, sem, trifolium, wind