PLANT PHYSIOLOGY
TRANSPORT IN PLANT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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when the root pressure is high and the rate of transpiration is low.
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when the root pressure is low and the rate of transpiration is high
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when the root pressure equals the rate of transpiration
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when the root pressure as well as rate of transpiration are high.
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Detailed explanation-1: -The process of loss of water in the form of liquid drops from the edges of leaves or the tips of veins through hydathodes is known as guttation. This process usually happens in herbaceous plants when the humidity is and the root pressure is high and the rate of transpiration is low.
Detailed explanation-2: -When transpiration is high these water is lost into the atmosphere resulting in decrease of the pressure. But when the rate is low the water and nutrients will be stored in the roots itself thus the root pressure will remain high.
Detailed explanation-3: -Guttation is the loss of water (in the liquid phase) from the surface. As a result, root pressure causes a positive pressure to be formed in the xylem, causing the guttation process to occur.
Detailed explanation-4: -So, the correct answer is ‘Guttation’.
Detailed explanation-5: -Transpiration and guttation are the two important process of removal of excess water from the plants. However, the two processes are different from each other. Transpiration is the removal of water from the stomata present on the leaves. On the contrary, guttation is the process of removal of water from the hydathodes.