If solute concentration is high and water potential is low in the root cells, water can enter from soil to root cells through 
endosmosisKaynak: Absorption of waterPorrett's contribution to physics was the discovery of electric 
endosmosis  in 1816.  The phenomenon had, according to Gustav Heinrich
Kaynak: Robert PorrettA plant cell in hypotonic solution will absorb water by 
endosmosis , so that the increased volume of water in the cell will increase
Kaynak: PlasmolysisHe also investigated electrical 
endosmosis  and the electrical resistance of electrolyte s. Chisholm | 1911 | loc Wiedemann, Gustav Heinrich
Kaynak: Gustav Heinrich Wiedemann