Pollen is a fine to coarse powder consisting of microgametophytes (pollen grains), which carry the male gametes of seed plants. Each pollen grain contains one or two generative cells (the male gametes) and a vegetative cell. The group of three cells is surrounded by a cellulose cell wall and a thick, tough outer wall made of sporopollenin.

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SEM image of pollen grains from a variety of common plants: sunflower (H ...
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Allergy and Asthma Resources
... AIR FILTERING DEVICES Environmental Protection Agency Ariel Rios Building 1200 Pennsylvania Avenue, NW Washington, DC 20460 (202) 272-0167 http://www.epa.gov ALLERGIC SKIN DISEASES National Institute ...
Source: National Institute of Allergy and Infectious Diseases

   

Pollen Articles

  • Allergy and Asthma Resources
    ... AIR FILTERING DEVICES Environmental Protection Agency Ariel Rios Building 1200 Pennsylvania Avenue, NW Washington, DC 20460 (202) 272-0167 http://www.epa.gov ALLERGIC SKIN DISEASES National Institute ...

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