Plant hormone plays an important role in agriculture and horticulture manufacture. As such, they have gained widespread commercial use in nurseries and in farming.
Stem, leaf, and roots, growing without control causes problems, as inconvenience, landscape design, etc..
However, with only mechanical controls does not regulate and inhabit the growth direction of the plants for long.
Plant hormones regulate various physiological processes of plants such as photosynthesis, growth, stress response, reproduction, longevity, and senescence.
The six major phytohormones identified are auxins, abscisic acid, cytokinins, ethylene gibberellin, and brassinosteroids.
Auxins
Auxins function primarily in stem elongation by promoting cell growth. As such, Indole-3-acetic acid (IAA) is the major naturally occurring auxin, they have also been presented as one of the major growth factors in plants.
