Cocksfoot pollen

Cocksfoot pollen

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Caption: False-colour scanning electron micrograph (SEM) of two pollen grains of cocksfoot grass, Dactylis glomerata, a major cause of hay fever (allergic rhinitis). The pit on the right-hand grain is the germination pore, out which the pollen tube grows. Cocksfoot pollen is a wind-dispersed summer pollen. Hay fever sufferers produce a sensitising antibody, immunoglobin E (IgE), which attaches to cells in the nose & eyes. It reacts with inhaled pollen, causing the release of various chemicals including histamine. Histamine causes the mucous membranes of the nose, eyes, & throat to swell & become inflamed, bringing on the symptoms of hay fever. Magnification: x570 at 6x4.5cm size. JBU colouring: blue & orange. BW original is B786/073.

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Keywords: allergen, allergic rhinitis, allergy causing, botany, cause, circular, cocksfoot grass, cocksfoot pollen, coloured, dactylis glomerata, germinating pore, grains, hay fever, hayfever, jbu colouring, nature, plant, plants, pollen, pollinosis, reproduction, reproductive, round, scanning electron micrograph, sem, spherical, two

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