Question

how does transpiration account for the transport of water during the time

Answer 1

Transpiration is the process of movement of water through a plant and its evaporation from the aerial parts of the plant like leaves, flowers and stems. The roots take only a small amount of water for growth and metabolism while the remaining 97 - 99.5% of the water is lost by transpiration and guttation.

There are pores called stomata on the surface of the leaves. They are bordered by guard cells and stomatal accessory cells which open and close the pore. Transpiration takes place through the stomatal apertures.

Transpiration cools the plants, changes osmotic pressure of the cells, enables mass flow of mineral nutrients and water from the roots to the shoots.

Answer 2

Transpiration is the basically the process by which the plants lose their water content through their leaves and their young stems.

In this process, the moisture and water are carried throughout the plant from the roots to the tiny stomatal pores under the leaves. Here, the water changes into vapor and escapes into the atmosphere.

The differences in the water potential in the ground and the plants help in pulling up the water from the ground to the plants via the roots.

These water molecules are then transported to the xylem which is explained by the Cohesive tension theory. The cohesive and adhesive forces allow the formation of a water column in the xylem. This water then gets transported to the mesophyll cells of the leaves, where they are evaporated by diffusion from the stomata of the leaves and young stems.