Distinguish between tropic movement and nastic movement in plants
Answers
Hlo there! Your answer is here
D/f b/w tropic movements & nastic movements in plants;
Tropic movements:
1. Tropic movements are paratonic movements of growth. Nastic movements are paratonic movements of variations.
2. Example: Movement of shoot towards the sunlight (phototropic movement). Drooping of the leaves of Mimosa pudica due to touch (Thigmonastic movement).
3. Tropic movements are shown by plant organs with radial symmetry (such as root and stem). Nastic movements are shown by plant organs with bilateral symmetrical (flat) such as leaves and stomata.
4. Stimuli for the tropic movements are unidirectional and never diffused. The stimuli for the nastic movements may be unidirectional or diffused.
5. The tropic movements are related to the direction of stimuli. Nastic movements are NOT related to the direction of stimuli.
6. Tropic movements are comparatively slow movements. Nastic movements are quick movements.
7. Tropic movements are caused by the cell divisions in the organ. The nastic movements are caused by the change in the turgor pressure of the cells in the organ.
Nastic movements:
1. Nastic movements are paratonic movements of variations.
2. Drooping of the leaves of Mimosa pudica due to touch (Thigmonastic movement).
3. Nastic movements are shown by plant organs with bilateral symmetrical (flat) such as leaves and stomata.
4. The stimuli for the nastic movements may be unidirectional or diffused.
5. Nastic movements are NOT related to the direction of stimuli.
6. Nastic movements are quick movements.
7. The nastic movements are caused by the change in the turgor pressure of the cells in the organ.
Thank you
Hope it will help you!