Stomatal complex in leaf of the pea plant

Stomatal complex in leaf of the pea plant

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Caption: Transmission electron micrograph of a stomatal complex in a young leaf of the pea plant, Pisum sativum. The picture shows two developing guard cells separated by a cell wall which will split to form the stomatal opening. Both cells are dominat- ed by a large nucleus containing clumps of dark- staining chromatin. Stomata are pores in the epidermis of the leaf; they regulate the exchange of water & gases between the atmosphere & the leaf interior. When the guard cells are full of water the pore is open; when it loses water the pore closes. Closure is a natural response to darkness & drought. Magnification: x1860 at 35mm size, x13,000 at 8x10-inch size. Reference: MICROCOSMOS, figure 4.11, page 73.

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Keywords: botany, electron micrograph, guard cell, leaf, leaves, nature, pea, pisum sativum, plant, plants, stoma, stomata, tem, transmission

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