how does transpiration helps in upward transport of substance
Answers
As the water evaporates, there is a decrease in pressure in the plant which in turn helps the root to absorb water and as the water transpires the water in the root is sucked upward by pressure and hence is transported to each and every part of plant. As the minerals are dissolved in the water (in small quantities) they are also transported through the same medium. this saves energy for the plant.
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Title:
Transpiration is defined as a biological process that occurs in plants in which the loss of water takes place from leaves of the plant in the form of vapour.
Explanation:
The process of transpiration helps in upward transport of substances is explained by cohesion tension theory and transpiration pull.
It involves the upward movement of water in case of tall trees. The force which plays an essential role in the upward movement of water is transpiration pull that is generated in the leaves, it helps to pull the water column and xylem tracheids as well as vessels are filled with water. In the day time, the cohesion force, as well as transpiration, pull carried out the movement of sap from leaves.
It helps in the regulation of temperature and also prevents plants from burning by providing cooling effect due to evaporation of water. Due to the constant loss of water, a negative force is generated that acts like a suction force pulling the water upward towards the stem.