Unlike animals, plants do not have a nervous system or
muscular system. Then how do they exhibit movements? The movements exhibited by
the plants are mainly in response to the stimulus. In certain sensitive plants
like Mimosa, movement is in response to stimulus touch. This movement is known
as seismonastic movement. There is no growth involved in this movement. On the
other hand, the movement of the seedling is because of growth. If growth is
prevented, it (seedling) does not exhibit any movement. Here we conclude that
plants exhibit two types of movements, one which is growth dependent movement
and the other which is growth independent movement.
