The cell is spoken of as being turgid. Water will only enter until vacuole and cell is full regardless of solute differences. To explain the movement of water between the inside and the outside of plant cell, turgor pressure in the cell often has to be taken into account as well as the difference in solute between a plant cell and its environment. Water enters the plant. Water enters the plants through the roots mainly in zone where the root hairs are located.
Water has to cross the diameter of the root toget to the stele.
Water can only get into the stele by osmosis or symplastically. The endodermis acts as skin or boundary around the stele which monitors what gets into and out of the stele. The endodermis can concentrate minerals inside the stele and also sugar water is being brought down through the phloem making the water in the stele have more solute in it than the water outside of the stele. Thus, favoring the movement of water into the stele so that the root is acting like an osmometer and the water that enters the stele is pushed up the xylem of the stele as more and more water enters the stele. This mechanism is called root pressure.