| TERMS | DEFINITIONS |
| Autonomic movement. |
The movements induced by some internal causes are called autonomic movement. It example is ciliary movement. |
| Paratonic movement | The movement induced by external stimuli is called Paratonic mmement. |
| Tropic movement | The movements in curvature of whole organ. towards or away form the stimuli such as light. gravity and touch are called tropic movement |
| Thigmotropism | The tropic movement in response to stimulus of touch is called thigmotropism. |
| Chemotropism | The tropic movement in response to some chemical is called chemotropism. |
| Hydrotropism | The tropic movement of plant in response to stimulus of water is called hydrotropism. |
| Geotropism | The tropic movements in response to gravity are called geotropism. |
| Cholodny and Went theory of photoperiodism | Cholodny and Went theory suggested that the phototropicresponse occur due to unequal distribution of auxin (IAA). |
| Cholodny and Went theory of geotropism | This theory suggests that differential growth in geotropism is caused due to unequal distribution of auxin (IAA) in the upper and loner halves or the shoot. |
| Statocysts | The cells containing amyloplasts are called statocysts. |
| Nyctinasty | The diurnal movements are called nyctinastic or
sleep movements. |
| Pulvinus | The pulvinus is the swollen portion of petiole. |
| Seismonastic | The shock movements are called Seismonastic. |
| Haptonastic movements |
The nastic movements occurs due to stimulus of touch are called Haptonastic movements. |
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