Question

Give two examples of phytohormones.

Answer 1

1. Plants need sunlight, water, oxygen, and minerals for their growth and development. These are external factors.
2. Apart from these, there are some intrinsic factors that regulate the growth and development of plants. These are called plant hormones or “Phytohormones”.
3. Plant hormones are chemical compounds present in very low concentrations in plants.
4. They are derivatives of indole (auxins), terpenes (Gibberellins), adenine (Cytokinins), carotenoids (Abscisic acid), and gases (Ethylene).
5. These hormones are produced in almost all parts of the plant and are transmitted to various parts of the plant.
6. Hormones play an important role in the processes like vernalization, phototropism, seed germination, dormancy, etc. along with extrinsic factors.
7. Different growth regulators present in the plant are Auxins, Gibberellins, Cytokinins, Ethylene, and Abscisic acid.