Auxins

Auxins are one of the most important groups of plant hormones that regulate the growth and development of tomatoes. Among other things, they are responsible for cell elongation, apical dominance, root development, and fruit set. The natural concentration of auxins varies depending on the plant’s stage of development. They interact with other hormones, such as gibberellins and cytokinins, influencing the proper growth habit and growth rate of tomatoes.