Lily pollen, SEM

Lily pollen, SEM

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Credit: SUSUMU NISHINAGA/SCIENCE PHOTO LIBRARY

Caption: Pollen grains. Coloured scanning electron micrograph (SEM) of pollen grains from a lily (Lilium sp.) plant. The outer wall (exine) of the pollen is highly sculpted, which may assist in wind, water or insect dispersal. The pores in the exine are involved in regulating the water content of each grain and in pollen germination. Each pollen grain contains one of the plant's male gametes. These fertilise the eggs, initiating the formation of seeds. Magnification: x180 at 6x7cm size.

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Keywords: botany, coloured sem, exine, grain, lilium sp., lily, many, multiple, nature, plant, plants, pollen grains, reproduction, reproductive, scanning electron micrograph, sculpted, sculpting, surface

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