Guttation take place during night when

Root pressure is positive

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Root pressure is negative

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Always take place

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It does not takes place at all

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Solution

The correct option is A Root pressure is positive
Guttation is the loss of water in liquid form as a dilute solution from uninjured leaf tips. The uninjured leaf tips have hydathodes or water stomata. Under conditions of low transpiration dilute solution of minerals oozes out through them under the influence of increased root pressure. Thus, mostly guttation is observed during night time when transpiration is low, for example, due to high atmospheric humidity and sufficient water is present in soil. The most important force responsible for guttation is positive root pressure.

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Similar questions

Q. (a) Leaves sometimes drip water at night. Suggest a cause.
(b) Guttation usually takes place at night when stomata are closed causing water evaporation to slow down. What environmental conditions cause guttation during the day? [2 MARKS]

Q. Assertion :The loss of water in its liquid phase from the leaves is called guttation. Reason: Guttation takes place at night only.

Question 7

Which of the following is correct for respiration in plants?
(a) Respiration takes place only during daytime.
(b) Respiration take place only during night.
(c) Respiration takes place both during day and night.
(d) Respiration takes place only when plants are not making food.

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