What is the Difference Between Thigmotropism and Thigmonasty?
🆚 Go to Comparative Table 🆚Thigmotropism and thigmonasty are both plant responses to touch stimuli, but they differ in their directionality and the nature of the response.
Thigmotropism:
- Directional movement of plant parts in response to touch.
- Involves the growth response of the plant.
- Examples include the coiling of tendrils or twiners upon contact with objects and the winding movement of the tendril of a climbing plant.
Thigmonasty:
- Non-directional movement of plant parts in response to touch.
- Not influenced by the direction of the stimulus.
- Examples include the shutting of a Venus flytrap, the drooping of leaflets of Mimosa pudica when touched, and the shrinking and rebounding of the anthers when a pollinator lands on the flower.
In summary, the key difference between thigmotropism and thigmonasty is that thigmotropism involves directional movement of plants in response to touch, while thigmonasty involves non-directional movement in response to touch.
Comparative Table: Thigmotropism vs Thigmonasty
Thigmotropism and thigmonasty are two different types of plant movements in response to the stimulus of touch. Here is a table highlighting the differences between them:
Feature | Thigmotropism | Thigmonasty |
---|---|---|
Definition | Directional movement of plant parts in response to touch. | Non-directional movement of plant parts in response to touch. |
Examples | Bitter gourd tendrils winding around objects upon contact. | Mimosa pudica leaves folding up on touching. |
Cell Behavior | The winding movement of tendrils provides support to the plant. | The folding up of leaves is due to sudden loss of water. |
In summary, thigmotropism is a directional response to touch stimuli, while thigmonasty is a non-directional response. Examples of plants exhibiting these behaviors include the bitter gourd and Mimosa pudica, respectively.
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