This causes the change of their position that we perceive as movements. Just think of gastrulation or the cutting off of the neural tube. As has been said at the beginning is it distinguished between tactic and nastic movements. Phototropism and geotropism, for example, occur typically in organs of radial symmetry, like the shoot, or the axis of the main root, while nastic movements are typical for dorsiventral organs. As a consequence is a movement caused by stimulation primarily explained by the anatomy of an organ and thus by its mechanic properties.
Most turgor movements differ from typical growth movements in that they are reversible.
As has been explained elsewhere is this pressure opposed by that of the neighbouring cells. If their pressure increases simultaneously and in the same way, then considerable tensions within the tissue result that might lead to deformations of that tissue. Such a deformation can be the cause for the spatial shift of whole plant parts. Sometimes are the cells participating in such a movement surrounded by cell walls of different sizes, so that the pressure spreads into a certain direction. The guard cell movements within the epidermis is a prime example.