Question

What role does root pressure play in water movement in plants?

Answer 1

Root pressure is the positive pressure that develops in the roots of plants by the active absorption of nutrients from the soil. When the nutrients are actively absorbed by root hairs, water (along with minerals) increases the pressure in the xylem. This pressure pushes the water up to small heights. Root pressure can be observed experimentally by cutting the stem of a well-watered plant on a humid day. When the stem is cut, the solution oozes from the cut end.

Answer 2

Answer:

The plant root pressure increases the water pressure in xylem.

Explanation:

The absorption of soil nutrients by the plant root creates root pressure in plants. As the root hairs absorbs the nutrients of the soil, mineralised water puts increased pressure in xylem. The root exerted pressure pushes the water upward.

Another role of root pressure is to re-establish the water molecules chain in xylem. It also plays a role in forming of water droplets from endings of some herbaceous plant vein.