The figure given below is a diagrammatic representation of a part of the cross section of the root in the root hair zone. Study the same and then answer the questions that follow:
Due to an excess of this pressure sometimes drops of water are found along the leaf margins of some plants especially in the early morning. What is the phenomenon called?

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Solution

Explanation :
The phenomenon is called Guttation
This is a process in which we can see drops of xylem sap at the tips or edges of a plant's leaves.
It mostly occurs at night.
It occurs due to the excess water accumulation when the rate of water absorption by roots exceeds the rate of transpiration.

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The figure given below is a diagrammatic representation of a part of the cross section of the root in the root hair zone. Study the same and then answer the questions that follow:

(i) Name the parts indicated by the guidelines 1 to 4.

(ii) Which is the process that enables the passage of water from the soil into the root hair?

(iii) Name the pressure that is responsible for the movement of water in the direction indicated by the arrows. Define it.

Q. Formation of drops of water along leaf margin due to excessive root pressure is called ___ .

Q. Water droplets are seen along the leaf margins of herbaceous plants during an early morning, when evaporation is low. This phenomenon is termed ________.

Q. Imagine yourself in a lawn early in the morning. You look at a few plants having water drops along the margin of the leaves. After sometime, the water drops evaporate leaving white spots behind.
Assertion (A) :This is due to a phenomenon called guttation.
Reason(R) : In guttation, dissolved minerals form white spot after evaporation of water content.

Q. Short / Long answer type questions .
A farmer observed drops of water along the margins of leaves of tomato plants growing in his well irrigated field on a winter morning. Give reasons for this occurrence. Why the water drops appeared only along the leaf margins ?

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Explanation :The phenomenon is called GuttationThis is a process in which we can see drops of xylem sap at the tips or edges of a plant's leaves. It mostly occurs at night.It occurs due to the excess water accumulation when the rate of water absorption by roots exceeds the rate of transpiration.

Explanation :
The phenomenon is called Guttation
This is a process in which we can see drops of xylem sap at the tips or edges of a plant's leaves.
It mostly occurs at night.
It occurs due to the excess water accumulation when the rate of water absorption by roots exceeds the rate of transpiration.