Colored Scanning Electron Micrograph (SEM) of pollen grains on the stigma of a ragweed plant Ambrosia sp. The grains of pollen have a spiked surface appearance. The multi-lobed stigma is green. Ambrosia is a daisy like flower which grows in bare and waste ground. Its pollen is windborne and released in great quantities for cross pollination. Ambrosia pollen acts as an allergen causing hay fever (pollenosis) in allergic individuals. Sufferers produce a sensitive antibody which is found on the surface of cells in the nose and eyes; the antibody reacts to the pollen and the nose, throat and eyes become inflamed. Magnification unknown.
October 28th, 2014
Viewed 803 Times - Last Visitor from Cambridge, MA on 06/03/2023 at 3:54 PM