Write the physiological effect of Auxin.

Explanation

1. They promote cell elongation is stem and coleoptile.
2. At higher concentrations auxins inhibit the elongation of roots but induce more lateral roots. Promotes growth of root only at extremely low concentrations.
3. Suppression of growth in lateral bud by apical bud due to auxin produced by apical bud is termed as apical dominance.