Textured pollen grains of the lily

Textured pollen grains of the lily

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Caption: Pollen grains. Coloured scanning electron micro- graph (SEM) of pollen grains of the lily, Lilium sp. Pollen grain size, shape and surface texture differ from one plant species to another. The outer wall (exine) of the pollen in many plant species is highly sculpted which may assist in wind, water or insect dispersal. This pollen sculpting is also used by botanists to recognise plant species. Pores in the pollen wall help in water regulation and germination. Pollen contains the plant's male gametes. These fertilise the eggs or ovules, initiating formation of plant seeds. Pollen also causes hay fever. Magnification: x600 at 35mm size.

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Keywords: botany, cause, coloured sem, grain, hay fever, hayfever, lilium sp., lily, nature, of pollen, plant, plants, pollen, pollen grain, pollen grains, pollinosis, reproduction, reproductive, reticulated sur, type

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