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By what three processes does water rise from the roots to the top of a tree?
Wiki User
∙ 12y ago
Water travels from the roots to the top of a tree by the combination of 3 processes.
One of these processes is "transpiration" which occurs when water vapor escapes from the stomata, or small openings on the lower surface of leaves. This creates a negative pressure near the top of the trees which results in a sucking action similar to what happens when one inhales through a straw.
A second factor is "root pressure" which is the movement of water from the soil into the roots by osmosis. This causes a positive pressure in the roots which helps to "push" water into the plant.
The third process is "capillary action" which is the upward movement of water in very, almost microscopically, thin tubes. The structures in plants that transport water are called xylem tubes and they have a very narrow diameter so capillary action will occur in them.
These three processes acting together allow water to move against gravity to travel from the roots to the tops of tall trees and plants.
Wiki User
∙ 12y ago
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How does water rise from the roots to the very top?
due to turgor pressure
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Root pressure is what causes water to rise from the roots to the stems. Water travels through the xylem throughout the plant.
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