Cellular and Molecular Biology

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Transpiration in Plants


Transpiration is the evaporation of water from plant leaves.

Transpiration is controlled by

on the

of the leaf.

The mechanism by which transpiration occurs involves the opening of a pore (stoma) between these cells.

To open the stoma

must enter the cells, followed by

causing the cells to

. When the stoma opens, water can leave the leaf.