Question

State the importance of tropic movements in plants.

Answer 1

Hint: Tropic movement of plants refers to the movement against a stimulus. The stimulus can be light, water, gravitational force, soil, etc. when the plant makes a response against the light, the movement is called phototropic movement.
When movement against water, it is called hydrotropic movement. When the stimulus is gravity, it is called geotropism and so on.

Complete answer: The importance of tropic movements in plants are as follows:
Tropic movement help in the protection of plants.
It helps to develop a sudden response during any charge.
This movement also helps in the growth and development of plants by facilitating the movement of root, stem, and leaves towards the stimuli like sunlight, nutrients, water, etc.
This also helps in the growth of the pollen tubes towards the ovules.

Note: Here is the description of different types of tropism:
1. Phototropism: Here the stimulus is light. The stems grow towards the light and the roots grow against the light.
2. Geotropism: Here the stimulus is the gravitational force.
The roots grow towards gravity and the stems grow against gravity.
3. Chemotropism: Here the stimulus is a chemical substance that is released by the ovum. The movement of pollen grain towards the ovum is a classic example of this movement.
4. Thigmotropism: This is referred to as the movement of plants in response to any solid object present close to it.
5. Hydrotropism: Here the stimulus is water.
The roots grow towards the water and the stems grow against water.
6. Thermotropism: Here the stimulus is temperature. The stems grow towards the atmospheric temperature and the roots grow against atmospheric temperature.
Again in cool temperatures, the plant stems cannot grow well sometimes.