The physiological effects of Auxin:
The primary physiological effect of auxin in plants is to rouse the elongation of cells in the shoot. A very general example of this can be observed in phototropic curvatures where the unilateral light unevenly distributes the auxin in the stem tip. Other Physiological effects:
- Cells increase in length with the effect of auxin.
- Auxin helps plants to absorb more water.
- Auxin creates dominance in the growth of apical buds, called apical dominance. Apical buds grow rapidly, because of the presence of auxin at a large amount in the tropical regions.
- Auxin initiates the formation of roots.
- Auxin helps in the formation of fruits without pollination and fertilization.
- Auxin increases the rate of respiration.
- Auxin helps in the formation of seedless fruits.
- Auxins stimulate cell division in cambium and also in the primary meristems.
- Auxins induce root formation at low concentrations. This is made use of by horticulturists to induce root formations in stem cuttings.
- Auxin prevents leaf fall by suppressing the formation of abscission layer.