Write the mechanism of 'Transpiration pull' that contributes to the ascent of sap in tall trees.
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6
Hello Dear,
Your answer is Here.
The mechanism of 'Transpiration pull' that contributes to the ascent of sap in tall trees is---
The Roots of the Plants continue to take water from the roots and the Pressure commonly called as "Root Pressure" is created which forces the water and the Minerals to the Xylem Vessels.
→→Water forms continuous columns in the xylem vessels from there lower end in the roots to there upper ends in the Mesophylls cells [Cells which are present in the leaves and responsible for Transpiration] of the Leaves.
→→When water is lost from the leaves either due to Transpiration, or is consumed in the Process of Photosynthesis, the water column becomes greatly stretched.
However, the continuity of the water column does not break due to the Forces of Cohesion among the water molecules and the adhesion forces between the water molecules and the substance of the Wall of the Xylem Vessels.
→→The magnitude of the Transpirational pull is sufficient to raise water and Minerals up to the Tall of the Tallest Trees.
Due to the Transpirational Pull the Transpirational Stream is forms, thus the Water and Minerals reaches at the top of the Plants.
Hope it helps.↑
Have a Marvelous Day. :-)
Your answer is Here.
The mechanism of 'Transpiration pull' that contributes to the ascent of sap in tall trees is---
The Roots of the Plants continue to take water from the roots and the Pressure commonly called as "Root Pressure" is created which forces the water and the Minerals to the Xylem Vessels.
→→Water forms continuous columns in the xylem vessels from there lower end in the roots to there upper ends in the Mesophylls cells [Cells which are present in the leaves and responsible for Transpiration] of the Leaves.
→→When water is lost from the leaves either due to Transpiration, or is consumed in the Process of Photosynthesis, the water column becomes greatly stretched.
However, the continuity of the water column does not break due to the Forces of Cohesion among the water molecules and the adhesion forces between the water molecules and the substance of the Wall of the Xylem Vessels.
→→The magnitude of the Transpirational pull is sufficient to raise water and Minerals up to the Tall of the Tallest Trees.
Due to the Transpirational Pull the Transpirational Stream is forms, thus the Water and Minerals reaches at the top of the Plants.
Hope it helps.↑
Have a Marvelous Day. :-)
Answered by
3
Transpiration pull: The suction force which aids in drawing the water upward from roots to leaves is called as transpiration pull.
Mechanism: In leaves, water is needed for photosynthesis and excess water is released into atmosphere by transpiration through openings called as stomata.
The water deficit developed in leaf cells due to transpiration is responsible for pulling the water upward. This process is referred to as ascent of sap.
The evaporation of water from the leaf creates a suction force which is responsible for pulling water from the xylem cells of roots.
Thus, transpiration helps in the absorption and upward movement of water and minerals dissolved in it from roots to the leaves.
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