Question

What are examples of hydrotropism plants?

Answer 1

Hint: Hydrotropism refers to the growth or movement response of a cell or an organism in response to moisture or water. All the roots growing in the soil follow this phenomenon. We can infer the answer by learning different kinds of roots.

Complete answer:
Tropism is an orientation response of an organism usually to a stimulus. This involves the growth of an organism instead of the movement of an organism. The response that an organism response in relevance to any stimulus is mostly involuntary that means it cannot go either towards or away from the stimulus source as in taxis. If we talk about tropism, the response of the organism is often by growth instead of its movements. It may grow towards the stimulus or may grow either away from the stimulus.

When we talk about hydrotropism, it is a form of tropism which is characterised by the growth or movement response in relevance to moisture or water. The response is said to be positive when the organism tends to grow towards the moisture where it is said to be negative if the organism grows away from the moisture. An example of positive hydrotropism is the growth of plant roots towards a higher humidity levels where the plant can sense this at the root cap and it will then send a signal to the elongating part of the root.

Some of the examples of hydrotropism plants are:
- Tomato roots
- Radish roots
- Carrots

Note: It is the misconception that greater growth of roots in moist soil zones as compared to dry soil zones is due to hydrotropism. Hydrotropism requires a root to bend from a dry area to a wet area zone and the roots that require water to grow present in moist soil will grow more as compared to one present in dry soil.