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transpiration
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Discover how water moves through plants, including osmosis and transpiration
stoma with guard cells tree: absorption, cohesion and transpiration of water
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transpiration

botany
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Written by
Melissa Petruzzello
Melissa Petruzzello is Assistant Managing Editor and covers a range of content including plants, algae, and fungi; insects and spiders; and renewable energy and environmental engineering. She has her M.S....
Melissa Petruzzello
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transpiration, in botany, a plant’s loss of water, mainly through the stomata of leaves. Stomatal openings are necessary to admit carbon dioxide to the leaf interior and to allow oxygen to escape during photosynthesis. Hence, transpiration is generally considered to be merely an unavoidable phenomenon that accompanies the real functions of the stomata. It has been proposed that transpiration provides the energy to transport water in the plant and may aid in heat dissipation in direct sunlight (by cooling through evaporation of water), though these theories have been challenged. Excessive transpiration can be extremely injurious to a plant. When water ...(100 of 488 words)

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