LM of the surface of a sycamore leaf

LM of the surface of a sycamore leaf

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Credit: POWER AND SYRED/SCIENCE PHOTO LIBRARY

Caption: Light micrograph of the surface of a leaf of the sycamore tree, Acer pseudoplatanus. The two bands of elongated cells (at upper right and upper left) correspond to vascular strands or leaf veins. The small oval structures visible on the leaf surface are stomata (pores), which provide the plant with a means of gaseous exchange between the atmosphere & the internal tissues. The pores are held open during the day & are closed at night to conserve water. Surrounding each stoma are two curved lip- like guard cells which control the opening & closing of the pore. Magnification: x200 at 35mm size.

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Keywords: acer pseudoplatanus, botany, guard cell, leaf, leaves, light micrograph, nature, plant, plants, stomata, sycamore leaf

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