HORTICULTURE SCIENCE
PLANT BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How is the translocation of water through capillarity explained?
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As water transpires from the leaves, a pull is created on the column of water
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As wind speed and temperature increase the rate of translocation increases
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The root tissues, full of water, exert pressure that forces water up the xylem
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Water moves upwards due to the adhesion of the water molecules to tracheid walls
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Explanation:
Detailed explanation-1: -Since water is attracted to other molecules, adhesive forces pull the water toward other molecules. Water is transported in plants through both cohesive and adhesive forces; these forces pull water and the dissolved minerals from the roots to the leaves and other parts of the plant.
Detailed explanation-2: -Capillary action helps bring water up into the roots. But capillary action can only “pull” water up a small distance, after which it cannot overcome gravity. To get water up to all the branches and leaves, the forces of adhesion and cohesion go to work in the plant’s xylem to move water to the furthest leaf.
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