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Question
The force responsible for guttation in herbaceous plants is
The force responsible for guttation in herbaceous plants is
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Solution
The correct option is B Root pressure
The correct option is B.
Explanation of correct option:
- Guttation is the process by which water is lost from the surface of leaves in the form of water droplets through openings called hydathodes.
- Root Pressure is the osmotic pressure inside the cells (xylem) of roots due to which various ions from the soil along with water are transported into the roots, which increases the pressure inside the xylem. It acts as positive pressure and can push water up to small heights in the stem.
- Root pressure occurs when the moisture is high in soil (at night or when transpiration is low in the day).
- So, due to root pressure water droplets collect at the tips or edges of the leaves in the herbaceous plants.
- During the night and early in the morning, evaporation is low. Hence, the water drops collected on the leaves after guttation does not get evaporated and occurs as dew.
Explanation of incorrect options:
Option A:
- Transpiration is the process in which water gets evaporated from plant leaves and other parts.
- Transpiration takes place during the day while guttation takes place at the night.
Option C:
- Osmosis is the process through which plants absorb water from the soil.
- The cell membrane of the root hair cell acts as a partially permeable membrane and because the cell sap inside the vacuole has a low water concentration so the water passes from the soil which has a high water concentration into the root hair cell by osmosis.
Option D:
- Photosynthesis is the process through which green plants and some other organisms transform light energy into chemical energy.
- During photosynthesis in green plants, light energy is captured and synthesized along with water, carbon dioxide, and minerals to convert into oxygen and energy-rich organic compounds.
Final Answer: The force responsible for guttation in herbaceous plants is root pressure.
Root pressure
The correct option is B.
Explanation of correct option:
- Guttation is the process by which water is lost from the surface of leaves in the form of water droplets through openings called hydathodes.
- Root Pressure is the osmotic pressure inside the cells (xylem) of roots due to which various ions from the soil along with water are transported into the roots, which increases the pressure inside the xylem. It acts as positive pressure and can push water up to small heights in the stem.
- Root pressure occurs when the moisture is high in soil (at night or when transpiration is low in the day).
- So, due to root pressure water droplets collect at the tips or edges of the leaves in the herbaceous plants.
- During the night and early in the morning, evaporation is low. Hence, the water drops collected on the leaves after guttation does not get evaporated and occurs as dew.
Explanation of incorrect options:
Option A:
- Transpiration is the process in which water gets evaporated from plant leaves and other parts.
- Transpiration takes place during the day while guttation takes place at the night.
Option C:
- Osmosis is the process through which plants absorb water from the soil.
- The cell membrane of the root hair cell acts as a partially permeable membrane and because the cell sap inside the vacuole has a low water concentration so the water passes from the soil which has a high water concentration into the root hair cell by osmosis.
Option D:
- Photosynthesis is the process through which green plants and some other organisms transform light energy into chemical energy.
- During photosynthesis in green plants, light energy is captured and synthesized along with water, carbon dioxide, and minerals to convert into oxygen and energy-rich organic compounds.
Final Answer: The force responsible for guttation in herbaceous plants is root pressure.
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