SEM of pollen grain from cocksfoot grass

SEM of pollen grain from cocksfoot grass

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Credit: DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY.

Caption: Scanning electron micrograph of a pollen grain from cocksfoot grass, Dactylis glomerata, showing a germinating pore from which a pollen tube emerges. Cocksfoot pollen, a summer grass pollen dispersed by the wind, is a major cause of hay fever (medical term Allergic rhinitis & pollenosis). Sufferers produce a sensitising anti- body, immunoglobin E (IgE),which attaches to cells in the nose & eyes. It reacts with inhaled pollen(an allergen) causing the release of various chemicals including histamine.Histamine causes the mucous membranes of the nose, eyes & throat to swell & become inflamed, causing the symptoms of hay fever. Mag: X3700 at 10x8 inch, X530 at 35mm.

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Keywords: allergic rhinitis, botany, cause, cocksfoot, cocksfoot grass, dactylis glomerata, grass, hay fever, hayfever, nature, plant, plants, pollen, pollen pore, reproduction, reproductive, sem, type

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