Question

List out the physiological effects of Auxin.

Answer 1

Physiological Effects

1. They promote cell elongation in 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 the lateral bud by apical bud due to auxin produced by apical bud is termed as apical dominance.
4. Auxin prevents abscission.
5. It is responsible for the initiation and promotion of cell division in the cambium, which is responsible for secondary growth and tumor. This property of induction of cell division has been exploited for tissue culture techniques and for the formation of callus.
6. Auxin stimulates respiration.
7. Auxin induces vascular differentiation.