Question

How does transpiration pull help in ascent of sap?

Answer 1

When water gets evaporated from the surface of the leaves, in order to meet the requirements of the plant, the water is sucked up from the soil by the roots of the plant and is transported throughout the plant body i.e. from the roots of the plant till the leaves. This process of sucking of water from the soil, by the roots of the plant may be termed as transpiration pull. It is a basic process needed for the maintenance and the growth of the plant. This transports the water and all the essential nutrients from the soil to the various parts of the plant which are needed from its growth and maintenance.