TOPIC 04-COORDINATION -2
Plants respond to a variety of stimuli in their environment. Unlike animals, plants cannot move from one place to another. However, they can move by forces of wind or water. Movement in plants in response to a stimulus is continuous and very slow. Movement of plants can be grouped into two:
Growth movements
Turgor movement
1. Growth Movement
These are the movements that take place in the meristematic regions due to unequal permanent growth. Growth movements can be classified into two categories namely:
Autonomic movements
Paratonic movements.
(a) Autonomic Movements
These are self-controlled movements for instance growth in the meristematic regions i.e. tips of stems and roots.
(b) Paratonic Movements
These are the plant movements induced by external stimuli. These stimuli include:
Light
Moisture
Gravity
Chemicals
Touch
Paratonic movements include tropic and nastic movements