Design an experiment to demonstrate hydrotropism.
Answer
Plant movements that take place along a particular direction are called Tropic movements. When the stimulus that causes the movement is water , it is called hydrotropism .
Plants grow towards regions of water if there is a source of water nearby.
The following experiment demonstrates hydrotropism:
- Take two beakers and label them A and B
- In A, add moist soil and sow a seed
- In B, fill half with moist soil and half with dry soil. At the side of the moist soil place a water source also. Sow a seed.
- Let the plants grow.
You will notice that;
- In beaker A , the root grows straight as there is moist soil equally around
- In beaker B , the roots grow towards the side of the moist soil.
This experiment shows that plant roots have the tendency to grow towards a water sourc e.
This is hydrotropism .