Question

What is Transpiration, and how does it help in the upward movement of water in plants?

Hint:

Transpiration not only helps in the upward movement of water but also {cools the plant and maintains water balance}.

Answer 1

Concept: Plants absorb water from the soil through their roots and transport it to different parts of the plant. The loss of water vapour from leaves plays an important role in pulling water upward through the plant.
Step 1:Definition of Transpiration Transpiration is the process by which plants lose water in the form of water vapour from the aerial parts such as leaves, stems, and flowers, mainly through small openings called stomata.
Step 2:Transpiration Pull When water evaporates from the surface of leaves during transpiration, it creates a negative pressure (pull) inside the xylem vessels. This force is known as the transpiration pull.
Step 3:Upward Movement of Water Due to transpiration pull:

• Water absorbed by roots moves upward through the xylem tissues.
• The continuous column of water is maintained from roots to leaves.
• Minerals dissolved in water are also transported to different parts of the plant.

Thus, transpiration plays an important role in the transport of water and minerals within the plant.