Which substance is commonly used to promote rooting in cuttings?

Indolebutyric acid is a synthetic plant hormone that belongs to the group of compounds known as auxins. It is particularly effective in promoting rooting in plant cuttings, which is essential in propagation techniques. When applied to plant cuttings, indolebutyric acid enhances root formation by stimulating cell division and elongation in the root meristem, thereby accelerating the process of rooting. This substance helps to create a favorable environment for the development of roots, leading to healthier and more vigorous plants.

While gibberellins, cytokinins, and other auxins also play important roles in plant growth and development, they are not as specifically effective in promoting root development as indolebutyric acid. Gibberellins primarily influence stem elongation and fruit development, while cytokinins promote cell division and delay aging in plant tissues. Other types of auxins can be involved in rooting, but indolebutyric acid is recognized for its particular efficacy in this context, making it the preferred choice among plant propagators.