Question

What plays the most important role in the movement of water through a plant?

Answer 1

1. There are different factors that play their role during water transport in plants that are roots, osmosis, diffusion, vascular tissue, root pressure, and transpiration.
2. During the daytime, water, and minerals in plants are absorbed from the soil by roots.
3. They are pulled and pushed up by various forces to reach each and every cell.
4. The most important part of water transport is long-distance transport from root to shoot.
5. Transpiration performs the main role in long-distance transport because it generates a pull on the water column, which pulls water up to long distances.
6. Transpiration is the loss of water in the form of water vapours from the aerial parts of a plant.
7. During night time the root hairs pick up water which is transferred inwardly due to high osmotic concentration.
8. Salts accumulate in the basal part of the xylem which results in the entry of water molecules into the xylem to form a long continuous column of water.
9. This results in the development of positive pressure known as root pressure.