Question

what are hormones? discuss the practical application of auxin.

Answer 1

Auxins Application # 1. Rooting:

Besides indole acetic acid, some other synthetic auxins especially naphthalene acetic acid and indole butryic acid are widely employed in initiating early and vigorous rooting in plants which are propagated by cuttings.

Auxins Application # 2. Prevention of Pre-Harvest Drop of Fruits:

Premature falling of the fruits can be checked by the application of auxins such as 2, 4-D and 2, 4 6-trichlorophenoxy acetic acid which delay the formation of the abscission layer.

Answer 2

Hormones are the chemical substance which helps in coordinating activities in animals and plants.

Practical application of auxin:

Auxin promote growth in apical bud region but suppress growth in lateral bud. This is called apical dominance.