Question

Describe different tropic movement in the plants with examples.

Answer 1

Tropic movement takes place in response to stimuli. The different types of stimuli are :

Phototropism: It is the movement of plants in response to light. For example, shoot bends towards the light.

Geotropism – It is the movement of a plant part towards the soil. For example, root grows towards soil.

Hydrotropism– It is the movement of a plant towards the water. For example, plant root growing in humid air bending toward a higher relative humidity level.

Chemotropism – It is the movement of plants in response to a chemical stimulus. For example, the growth of the pollen tube towards the ovule.

Thigmotropism – It is a directional movement in plants in response to touch. For e.g. the plant tendrils climb around any support which they touch.