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What is transpiration?

Transpiration is the process by which water evaporates from the leaves of plants. Transpiration is a part of the water cycle, and allows water to be recycled over and over by numerous organisms over time. Water is carried through the plant's vascular system beginning in the roots and moving upward through the stem and to the leaves. A plant's leaves have small holes on their bottom surface called stomata (or stoma singular). These holes open and...

Transpiration is the process by which water evaporates from the leaves of plants. Transpiration is a part of the water cycle, and allows water to be recycled over and over by numerous organisms over time. Water is carried through the plant's vascular system beginning in the roots and moving upward through the stem and to the leaves. A plant's leaves have small holes on their bottom surface called stomata (or stoma singular). These holes open and close to allow water to evaporate out of the plant. The water exits the stomata and enters the earth's atmosphere as vapor.



Depending on factors such as temperature, humidity, sunlight, wind, and water availability, the plant will release a certain amount of water via transpiration. These factors combined with the particular type of plant determine the amount of water released via transpiration. Desert plants, for example, retain much more water than plants in wetter ecosystems. The stomata open and close to regulate the amount of water the plant retains.

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