The plant hormones are produce in very small amounts yet this small amount can have a profound effect on the growth and the development of the plant organ. Gibberellins are defined as a class of related plant hormones that stimulate growth in the stem and leaves, trigger the germination of the seed and breaking of bud dormancy, and stimulate fruit development with auxin. In 1926 E Kurosawa discovered that the reason seedlings where growing so tall and toppling over is because of the disease caused by a fungus of the genus Giberella. Four years later Japanese scientist concluded that the fungus produced hyperelongation of stems by secreting a chemical called gibberellins. Over the last thirty years many different scientist identify over seventy types of gibberellins, most of which occurred naturally in plants.
Some types are much more active then others.
Growth regulators are normally overdosed in plants of lower concentrations. Gibberellins have many different effects on plants. Gibberellins production occurs mainly in the roots and young leaves. Little growth actually occurs in the root but mainly in the leaves and stems. Even though there is little effect on the root growth, the gibberellins stimulate growth in the stems and leaves.