Root pressure The pressure that may build up in a plant root system due to the root cells, which is thought to help force water upward in the xylem vessels.

• 根压：由于根渗透势而形成的植物根内压力，可以帮助水分在木质部中的上升，这一作用可通过切断茎，水从切口渗出的现象得到证实。