Transpiration Definition
6 Important Significance Of Transpiration
The main advantages of Transpiration are
- Cooling
- Absorption of water
- Creating Suction force
- Transportation of water
- Transportation of Minerals
- Protection from heat injury
Cooling effect
- The evaporation of water during transpiration cools the leaves.
- The result of transpiration is also evaporative cooling, which can lower the temperature of a leaf and prevent denaturation of various enzymes involved in photosynthesis and other metabolic processes.
Also Check – How are Water and Minerals Transported in Plants ?
Absorption of water
- Transpiration influences the rate of absorption of water from the soil.
Suction force
- Transpiration helps in the ascent of sap by producing a suction force acting from the top of a plant.
- Evaporation from the leaves concentrates cell sap and increases their osmotic pressure.
- This draws water from the cells at the lower levels in a sequential manner (ascent of sap) and finally favors absorption of water from the soil by the roots.
- As the water evaporates from the leaves, a suction force is produced at the top of the plant drawing more water up through the stem and making the roots absorb more of it from the soil.
Also Check – Why is Transpiration Important for Plants
Transportation of water
- Since leaves are present at the tips of all branches and twigs, transpiration from their surfaces
- tends to draw water towards them and thus helps in the distribution of water throughout the plant body.
- By transpiration, water moves upwards and as it passes into the cell vacuoles, it makes the cells turgid. This gives form and shape to cells and plants as a whole.
- Higher the rate of transpiration, greater the rate of absorption of water and solutes from the soil.
Also Check – 10 Important Factors that Affect the Rate of Transpiration
Transportation of Minerals
- The water stream moving upwards carries dissolved minerals with it. Transpiration also helps in distributing these minerals throughout the plant.
Protection from heat injury
- Some plants like cacti, retain water by reducing transpiration.This saves the plants from high temperatures and strong sunlight.
Also Check – Transpirational Pull
Also Check – Transpiration Stream
Also Check – 14 Important Differences between Transpiration and Evaporation
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