Common sorrel leaf, SEM

Common sorrel leaf, SEM

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Credit: STEFAN DILLER/SCIENCE PHOTO LIBRARY

Caption: Common sorrel leaf. Coloured scanning electron micrograph (SEM) of the surface of a common sorrel (Rumex acetosa) leaf. Two stomata (leaf pores, brown rings) can be seen. Stomata are the site of gaseous exchange in a plant. The opening and closing of the stomata is controlled by semi-circular guard cells. When the guard cells are turgid the stomata are open and when they are flaccid the stomata are closed. Magnification: x450 when printed at 10 centimetres tall.

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Keywords: biological, biology, botanical, botany, cell, cells, closed, coloured, common sorrel, cuticle, edible, epidermis, false-coloured, flora, garden sorrel, gaseous exchange, green, guard cell, herb, leaf, leaves, nature, plant, plant respiration, plants, pore, pores, rumex acetosa, scanning electron micrograph, scanning electron microscope, sem, sour dock, spinach dock, stoma, stomata, surface

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