Pollen grain of Timothy grass

Pollen grain of Timothy grass

B786/0170 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 50.0MB

Downloadable file size: 3.8MB

Price image Pricing

Please login to use the price calculator


Credit: DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY

Caption: False colour scanning electron micrograph (SEM) of a pollen grain of Timothy grass, Phelum pratense, also known as cat's-tail. A summer (June-August) grass pollen dispersed by the wind, it is a major cause of hay fever (Allergic rhinitis & pollenosis). 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 familiar symptoms of hay fever. Magnification: X600 at 35mm size. Original is bw print b786/139.

Release details: Model release not required. Property release not required.

Keywords: allergy, botany, cat's-tail grass, cause, germinating pollen, grass, hay fever, hayfever, nature, phleum pratense, plant, plants, pollen, pore, reproduction, reproductive, sem, timothy, timothy grass, type

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.