Water movement from the to the are mediated by plants.
In terms of plant physiology, transpiration is the means by which plants keep the flow of sap going from roots to leaves.
Where plant densities are high, transpiration constitutes an important component of the local water cycle as well as microclimate. See also evapotranspiration.
Note the important role of plant vascular tissue in this process since not only does it increase the efficiency of water transport out of the soil but also allows plants to attain substantial size (i.e., vascular plants) and therefore substantial transpiration.