List the effects of auxins and gibberellins on plant growth.
Auxin and gibberellins are generally growth phytohormones. Some major effects of auxin on growth of plants are as follows:
1. Cell elongation:- Cell elongation is the most important function of auxin especially at the region of shoots and root tip behind the apical meristem. Cell enlargement is caused by the solubilisation of carbohydrates, loosening of wall of microfibril and increase permeability and respiration.
2. Root formation:- Auxin promotes root formation in cutting ends of...