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. This micrograph also clearly shows the wax platelets that cover the leaves. Magnification x7360 (x1811 at 10cm wide)

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

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