Question

How do green plants get water?

Answer 1

Plants absorb water:

With the help of the xylem, plants conduct water from the roots to multiple regions of the plant via the ascent of the sap process.

Ascent of sap:

1. The ascent of sap and the upward movement of water and minerals from the roots to the top of the plants via xylem are well known.
2. This is a phenomenon caused by water loss from the leaves during transpiration.
3. The tension created by transpiration pull compensates for water loss by causing an upward movement of water in the plant's xylem vessels.
4. According to cohesion tension theory, several factors are responsible for sap ascent, including transpiration pull, which is referred to as tension, cohesive property of water, and adhesion or hydration of the cell walls.

Cohesion-tension theory:

1. The cohesive force is the force of attraction between subjective water molecules.
2. This force causes the water molecules to cling together and cannot separate.
3. The adhesion force is the force of attraction between water molecules and the xylem wall.
4. Water molecules prefer to flow from the roots to the crown against gravity due to cohesion and adhesion.