Following are the significance of auxins:

1. The primary physiological effect of auxin in plants is to stimulate the elongation of cells in the shoot.
   
   
2. Auxin helps in apical dominance.
   
   
3. It is involved in root initiation.
   
   
4. Natural auxin has a controlling influence on the abscission of leaves, fruits, etc.
   
   
5. Auxins can induce the formation of parthenocarpic fruits.
   
   
6. It helps in vascular differentiation.