describe transpiration pull
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Transpiration pull theory states that. Water is pulled from above and not pushed from below through roots... As there is gravitational force downside but still two forces are there which helps to pull the water upward I.e. Cohesive and adhesive forces.Transpiration pull or the suction force is the force which aids in drawing the water upward from roots to leaves. In leaves, some amount of water is used for photosynthesis and excess water is released into atmosphere through openings called as stomata.The main cause behind this transpiration pull, water is lifted up in the plant axis like a bucket of water is lifted by a person from a well. Transpiration pull is responsible for dragging water at the leaf end, the pull or force is transmitted down to the root through water column in the xylem elements.
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