Question

What is the role of transpiration in transportation with labelled diagram

Answer 1

Answer:

Xylem moves water from roots to the leaves, and phloem moves food from the leaves to the rest of the plant. During transpiration water evaporates from the leaves and draws water from the roots.Transpiration is the evaporation of water at the surfaces of the spongy mesophyll cells in leaves, followed by loss of water vapour through the stomata.

Water moves through the xylem vessels in a continuous transpiration stream:

root → stem → leaf

Transpiration produces a tension or ‘pull’ on the water in the xylem vessels by the leaves. Water molecules are cohesive so water is pulled up through the plant.

The transpiration stream has several functions. These include:

transporting mineral ions

providing water to keep cells turgid in order to support the plant

providing water to leaf cells for photosynthesis

keeping the leaves cool by evaporation

Answer 2

Answer:

Role of transpiration in transportation

The loss of water in transportation creates a suction which pulls water from xylem cells of roots . Thus, water reaches to the upper parts of the plant by transpirational pull .

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