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Transpiration is the evaporation of water from plants. Most of the water absorbed by the roots of a plant—as much as 99.5 percent—is not used for growth or metabolism; it is excess water, and it leaves the plant through transpiration.
Why do plants transpire? Evaporative cooling: As water evaporates or converts from a liquid to a gas at the leaf cell and atmosphere interface, energy is released. This exothermic process uses energy to break the strong hydrogen bonds between liquid water molecules; the energy used to do so is taken from the leaf and given to the water ...
Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers. It is a passive process that requires no energy expense by the plant. [1] Transpiration also cools plants, changes osmotic pressure of cells, and enables mass flow of mineral nutrients.
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.
What is transpiration in plants and what does it mean. Also learn how it works in biology, its description, types, importance, factors using examples and diagram.
Why is Transpiration Important? The rate at which water moves through the plants due to transpiration plays an important role in maintaining plant water balance. This has many benefits for plants.
When the surrounding air is dry, diffusion of water out of the leaf goes on more rapidly. As transpiration occurs, the air surrounding a leaf becomes increasingly humid, reducing the difference in water potential between the intercellular air spaces and the atmosphere and slowing transpiration.
Transpiration is defined as water loss in the form of water vapor from the internal tissues of aerial parts of the plant body under the influence of sunlight and regulated to some extent by the cell's protoplasm.
Factors affecting transpiration. During transpiration plants move water from the roots to their leaves for photosynthesis in xylem vessels. Glucose made in photosynthesis...
Transpiration is the loss of water from the plant through evaporation at the leaf surface. It is the main driver of water movement in the xylem. Transpiration is caused by the evaporation of water at the leaf–atmosphere interface; it creates negative pressure (tension) equivalent to –2 MPa at the leaf surface.