Question:
The "Guttation" phenomenon is observed in :
The "Guttation" phenomenon is observed in :
Show Hint
Guttation is NOT dew!
Dew = Atmospheric water vapor condensing on the leaf surface.
Guttation = Liquid water pushed out from inside the plant through hydathodes due to root pressure.
Dew = Atmospheric water vapor condensing on the leaf surface.
Guttation = Liquid water pushed out from inside the plant through hydathodes due to root pressure.
Updated On: Aug 21, 2026
- Hydrophytes
- Xerophytes
- Chasmophytes
- Graminae family
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Question:
Guttation is the exudation of drops of xylem sap on the tips or edges of leaves of some vascular plants. The question asks in which group this is commonly observed.
Detailed Explanation:
• Mechanism of Guttation:
At night, when soil moisture is high and transpiration is low (due to high humidity or closed stomata), water enters the roots by osmosis. This creates positive root pressure.
This pressure forces xylem sap out of specialized pores called hydathodes located at the leaf margins or tips.
• Common Occurrence:
Guttation is most frequently observed in small herbaceous plants, especially in the early morning.
It is very prominent in members of the Graminae (Poaceae) family, such as grasses, wheat, rice, and maize.
You can often see "dew-like" drops at the tips of grass blades that are actually guttation fluid.
• Analyzing other options:
Xerophytes: Desert plants. They have adapted to minimize water loss; they rarely experience the high soil moisture and low transpiration conditions required for guttation.
Hydrophytes: Aquatic plants. While they are in water, many lack the structural hydathodes for the classic guttation seen in terrestrial grasses.
Step 2: Final Answer:
Guttation is a common physiological phenomenon observed in the Graminae family (grasses).
Guttation is the exudation of drops of xylem sap on the tips or edges of leaves of some vascular plants. The question asks in which group this is commonly observed.
Detailed Explanation:
• Mechanism of Guttation:
At night, when soil moisture is high and transpiration is low (due to high humidity or closed stomata), water enters the roots by osmosis. This creates positive root pressure.
This pressure forces xylem sap out of specialized pores called hydathodes located at the leaf margins or tips.
• Common Occurrence:
Guttation is most frequently observed in small herbaceous plants, especially in the early morning.
It is very prominent in members of the Graminae (Poaceae) family, such as grasses, wheat, rice, and maize.
You can often see "dew-like" drops at the tips of grass blades that are actually guttation fluid.
• Analyzing other options:
Xerophytes: Desert plants. They have adapted to minimize water loss; they rarely experience the high soil moisture and low transpiration conditions required for guttation.
Hydrophytes: Aquatic plants. While they are in water, many lack the structural hydathodes for the classic guttation seen in terrestrial grasses.
Step 2: Final Answer:
Guttation is a common physiological phenomenon observed in the Graminae family (grasses).
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