In all living organisms, growth is generally referred to as an irreversible increase in the size, the number of cells, and the whole organism. The development is related to all the changes that occur in an organism from the birth till the death.
In plants, Growth is mainly classified into:
Primary growth: It is the growth that results from the roots extending from shoots giving rise to a primary plant.
Secondary growth: It is the growth that results from the cell division in the lateral meristem giving rise to secondary vascular tissue.
Plant growth regulators, which are also called the plant hormones or phytohormones play a vital role in controlling the aspects Growth and Development of plants. They are the chemical substances, produced within plants. Auxins, Gibberellins, Cytokinins, Ethylene, and Abscisic acid are the five important Plant hormones which promote growth, development, and other physiological functions in the plant cells and tissues.
For more information about the Plant – Growth and Development, click on the below-mentioned links.