Open stoma. Coloured scanning electron micrograph (SEM) of an open stoma on the surface of a tobacco leaf (Nicotiana tabacum). Stomata are pores found

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Open stoma. Coloured scanning electron micrograph (SEM) of an open stoma on the surface of a tobacco leaf (Nicotiana tabacum). Stomata are pores found on the leaf surface that regulate the exchange of gases between the leaf's interior and the atmosphere. Stomatal closure is a natural response to darkness or drought as a means of conserving water. Each pore is controlled by two guard cells (red); the pores open when they are full of water and close when they lose water. Magnification: x960 at 10 centimetres wide.

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Size: 4850px × 3602px
Photo credit: © DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: biological, biology, botanical, botany, cell, cells, coloured, epidermis, false-colour, false-coloured, green, guard, image, images, leaf, magnified, microscopic, nature, nicotiana, open, opening, photos, photosynthesis, plant, pore, respiration, sem, single, stoma, subjects, surface, tabacum, tobacco, transpiration