What type of diffusion takes place when a plant cell absorbs water?

The plant cell absorbs water by simple diffusion and osmosis. Also water can pass from cell to cell through the Plasmodesmata (which are communication channels through the cell wall from cell to cell, providing a very easy and important method for water transportation between the cells ). Also, the large area inside the cells occupied by the vacuoles increases the osmotic pressure ,and that in turn facilitates diffusion.

It's note worthy that water passes through many different types of diffusion before reaching the cell environment where it will be absorbed by simple diffusion as we have said.

To give you an example about the journey of water from the roots to the cells, the plant vessels absorb water by using methods like diffusion and active transport. In the Phloem, Sucrose is absorbed by active transport ( a process that increases the osmotic pressure ) and as a consequence water enters inside it by osmosis.