Question

What are the different types of movement in plants?

Answer 1

Explanation:

1. Tropic movements and

2. Nastic movements

Phototropism

The movement of a part of the plant towards light is called phototropism. Growth of aerial parts of a plant towards light is an example of phototropism.

2. Geotropism

The movement of a part of the plant towards gravity is called geotropism. Growth of roots of plants in downward direction is an example of geotropism.

3. Hydrotropism

The movement of a part of the plant towards water is called hydrotropism, e.g., movement of roots.

4. Chemotropism

The movement of a part of the plant towards a chemical is called chemotropism.During the process of fertilization the movement of pollen tube towards ovule due to secretion of a sugary chemical in the ovary is an example of chemotropism.

Nastic Movements

These are nondirectional movements which takes place neither towards nor away from the stimulus. The best example of nastic movement is folding and drooping of leaves of ‘touch me not’ plant when its leaves are touched with fingers.

Answer 2

$\underline \mathbb{ANSWER}$

》2 TYPES OF MOVEMENT ARE:

$\underline \mathbb{TROPIC\:MOVEMENT}$

• When the stimulus has a particular direction and movement of plant occurs in the direction of the

stimulus(either towards the stimulus or in the opposite direction ), this movement is called as tropic movement .

Example phototropism, geotropism, hydrotropism, and chemotropism.

•THERE ARE FOUR TYPES OF TROPIC MOVEMENTS:

1•Phototropic movement

2•Geotropic movement

3• Hydrotropic movement

4•Chemotropic moment

$\underline \mathbb{NASTIC\:MOVEMENT}$

These movements occur irrespective of direction of stimulus.

Example photonasty, thigmonasty, thermonasty and seismonasty.

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