IAA is the main auxin in plants, regulating growth and developmental processes such as cell division and elongation, tissue differentiation, apical dominance, and responses to light, gravity, and pathogens. Roots are most sensitive to fluctuations in IAA level.Lanolin is soft fat prepared form wool and is a good solvent for growth regulators. The paste is prepared with the fat and the growth regulator in a suitable preparation, sticks firmly and growth regulator does not dry out and remain in constant contact with the treated organ.Gibberellins are involved in the natural process of breaking dormancy and other aspects of germination. Gibberellins are produced in greater mass when the plant is exposed to cold temperatures. They stimulate cell elongation, breaking and budding, seedless fruits, and seed germination.
In this way the IAA,GA and lanolin works in beans plant.