Transpiration is the giving off of water by the leaves of a plant. Plants give off water chiefly through tiny pores called stomata on the surface of the leaves. The amount of water they give off depends somewhat upon how much water the roots of the plant have absorbed. The amount given off also depends upon such environmental conditions as sunlight, humidity, winds, and temperature. A plant should not be transplanted in full sunshine because it may lose too much water and wilt before the damaged roots can supply enough water. See also Leaf (Transpiration) .
