Question

explain the different types of movement shown in plant with examples
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Answer 1

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Answer 2

Answer:

There are two major different types of movement

Spontaneous movement: There are other plant movements which take place spontaneously, without any external stimuli. These movements are described spontaneous or autonomic movements.

Induced movement: Some plant movements are caused in response to certain stimuli also called paratonic movement. Which further divided into

1. TROPIC MOVEMENTS :

Growth movements, which occur in response to unidirectional external stimuli & result in positioning of the plant part in the direction of the stimulus, are said to be tropic movements.

Depending upon the nature of stimuli

A) Phototropism- form due to in response to light

B) Geotropism- form due to in response to gravity

C) Hydrotropism- form due to in response to water

D) Chemotropism- form due to in response to chemical

2. TACTIC MOVEMENTS

Tactic movements are movements of locomotion, which are induced by some unidirectional external stimuli.

Their direction is controlled by the direction of the stimulus.

Depending upon the nature of stimuli, these movements are of following types:-

A) Phototactic

B) Chemotactic

C) Thermotactic

3. NASTIC MOVEMENTS=The movement can be due to changes in turgor or changes in growth

Depending upon the nature of stimuli, these movements are of following types

A) Nyctinasty- movement of plant organs occur in response to day and light and thus are also known as sleep movement.

B) Chemonasty

C) Seismonasty- movements are in response to shock by a touch stimulus. Very well known example is Mimosa pudica.

Explanation: