Thigmotropism Movement
Thigmotropism Movement
The tropic response of organisms to touch or contact with a solid surface is called thigmotropism. It can be positive and negative based on response of plant part towards the stimulus of touch.
Examples :
The climbing parts of a plant that twine around a support are positively thigmotropic. When such a plant part touches a support, the side of its apical meristem in contact with the support grows slower than the other side. This is how tendrils coil around a support. A negative thigmotropism is a response away from the touch stimulus. An example of negative thigmotropism is the growth of roots underneath the soil. When an elongating root comes in contact with an object, e.g. rock,it grows away from the object.
The change in the direction of growth of root in response to the contact with the rock is an example of which type of tropic movement ? | |||
| Right Option : C | |||
| View Explanation | |||
Movement of plant parts in response to touch is called ______________ | |||
| Right Option : C | |||
| View Explanation | |||
Thigmotropism is a type of | |||
| Right Option : A | |||
| View Explanation | |||
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