Oak Leaf Stoma (Quercus robur)

Oak Leaf Stoma (Quercus robur)

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Credit: POWER AND SYRED/SCIENCE PHOTO LIBRARY

Caption: Scanning electron micrograph (sem) of an oak leaf stoma (Quercus robur). Stomata are pores that open and close in order to regulate gas exchange in a plant. A stoma comprises a pore, the aperture of which is controlled by a pair of specialised cells known as guard cells. These cells swell to close the pore and shrink to open it. Stomata are found mainly on the underside of leaves. Magnification x10770 (2650 at 10cm wide).

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Keywords: botanical, botany, gas exchange, guard cells, leaf, leaves, oak, oak leaf, open stoma, photosynthesis, plant anatomy, pore, pores, quercus robur, respiration, respiratory, scanning electron micrograph, scanning electron microscope, sem, stoma, stomata, transpiration

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