Different Types of Movements in Plants
- i) Tactic movement:
In this type of movement plant body moves as a whole from one place to another due to stimulus such as light, water and chemicals etc. For example chlamydomonas always moves towards low intensity of light.
- ii) Nastic movement:
These movements are shown by a part of stationary plant due to external stimulus. For example movements of bud scales and flower petals. Movement of mimosa pudica.
iii) Tropic movement:
When part or parts of the plant move in response to the stimulus then it is known as tropic movement. Two types of response are shown; positive and negative. There are three types of tropic movement:
- a) Geotropism:
The response shown by the tips of the shoots and roots of a plant to the stimulus of gravity is known as geotropism.
- b) Phototropism:
The response shown by the shoots and roots of the plant to the stimulus of light is known as phototropism.
- c) Hydrotrogism:
The response of growing tissues of plant to the stimulus of water known as hydrotropism.
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