Kinetin is an adenine derivative, .i.e., 6-furfuryl amino purine. Kinetin is not a natural cytokinin. 2, 4 - dichlorophenoxy acetic acid is a synthetic auxin often used in plant cell culture technique. It is also a common pesticide/herbicide used in the control of broad leaf weeds. Indole-3-Acetic acid is a natural auxin which positively influence cell enlargement, bud formation and root initiation. Gibberellic acid or Gibberellin is plant hormone which promotes cell elongation. Its chemical formula is C19H22O6 .