Assortment of pollen grains

Assortment of pollen grains

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Caption: Pollen grains. Coloured Scanning Electron Micro- graph (SEM) of an assortment of pollen grains. Pollen grain size, shape and surface texture differ from one plant species to another, as seen here. 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. These reproductive male spores produced by seed plants contain the male gametes. Pollen fertilises the female egg, with subsequent formation of plant seeds. Magnification: x600 at 6x7cm size. x1000 at 4x5"

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Keywords: allergen, allergy, assorted, botany, nature, plant, plants, pollen, reproduction, reproductive, scanning electron micrograph, sem, type

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