Question

Why does transpiration helps 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.

Answer 2

The upward movement of water and minerals in a plant through xylem is called ascent of sap. During transpiration, pressure in the internal roots develop known as root pressure. This root pressure helps in ascent of sap. Thus, transpiration helps in ascent of sap.


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