Section of a leaf of Tradescantia

Section of a leaf of Tradescantia

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Caption: Light micrograph of a surface section of a leaf of Tradescantia, a spider wort plant. The small oval cells scattered over the surface are stomata, a series of 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. The opening & closing of the pores are controlled by two guard cells, stained red-brown. The micrograph also shows the epidermal cells, which are elongated & arranged like a jigsaw puzzle. They contain dark stained nuclei. The blue band across the picture is a vascular strand or leaf vein. Magnification: x100 at 35mm size.

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Keywords: botany, cell nucleus, guard cell, images, leaf, leaf vein, leaves, light micrograph, magnified image, microscopic photos, nature, plant, plants, spider wort, stoma, subjects, tradescantia

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