What is described as the process where water enters root cells due to pressure buildup from solute concentration?

The process where water enters root cells due to pressure buildup from solute concentration is known as root pressure. This phenomenon occurs when the concentration of solutes in the root cells is greater than that in the surrounding soil, leading to an influx of water into the root cells. As water enters, it causes an increase in pressure within the xylem of the roots. This pressure can help push water upward through the plant, particularly during periods when transpiration is low, such as at night.

Root pressure is primarily driven by the active transport of ions and solutes into the root cells, which in turn attracts water through osmosis. This process is vital for maintaining the plant's water supply, especially under certain conditions. While other processes like osmosis and transpiration are involved in plant water balance, root pressure specifically highlights the localized pressure generated from solute concentration differences in the roots, making it a distinct and important mechanism in plant biology.