Question

Design an experiment to demonstrate hydrotropism.

Answer 1

Living organisms are very much conscious of their surroundings and need several physical factors for their proper growth and survival. For every organism to grow well it needs water, air and temperature at an optimum level.

Complete answer:
-The organism gives response to the different types of stimulus that they receive from their surroundings. The reactivity of an organism or any movement or growth due to stimulus are referred to as tropism. Tropism is the orientation response towards any type of stimulus. The type of reaction that the organism exhibits towards any type of tropism is mainly involuntary in nature, which can be defined as the organism can go either towards or move away from the response.
-Hydrotropism is the tropism in which the growth and plant movement is towards or can be away from water sources or moisture. It is an involuntary process in which plants are grown in favour towards the water. Plants sense the water in their surroundings so that they can grasp water for different metabolic activities. The water molecules react and absorb the plants with the help of root systems. The plant roots have a high capacity in sensing the water molecules and giving signals to the tip of the root..
The root tip is the place from where the plants absorb water. Hydrotropism is important for plants as it makes the plants identify the water sources from the ground. The process of hydrotropism can be seen with the simple experiment. The experiment helps to understand the whole process of plant movement that occurs in the presence of any water source.

For the experiment two beakers, soil, plant seeds and water are required.
-First of all we have to take moist soil in beaker 1 and this we will slow and grow the seeds in the second beaker, One-part dry soil is taken and another moist soil is added and seeds are sown in this. Also we have to keep a tiny beaker with water, adjacent to the side of seeds. The setup is not touched for a few days so that growth of plants with the help of seeds can be fast.
-After a few days it is found that in beaker 1 the plants grow normally with straight roots because of the moisture content present in the soil.
-In the second beaker, the plants were grown towards the water source that was kept towards the plants. Roots will be in the side wards so that it can grow in the water source side and this condition in which the response of the plants is in the water side is called hydrotropism.

Note: The plants need some amount of water to carry out metabolic processes and they have the tendency to move towards water sources. This feature of plants to grow towards water is called hydrotropism.