Question

what is apical dominance?

Answer 1

Axillary Bud Method

In the axillary bud method, isolation of a shoot tip is achieved from which the axils of leaves develop axillary buds under the effect of high concentrations of cytokinin. Apical dominance is suppressed under the effect of high cytokinin concentration and permits the development of axillary buds. If a number of side shoots or axillary shoots have been formed on the shoot tip then their inoculation may be done on the fresh medium containing cytokinin. Often the axillary method is used in combination with the single node method.

Answer 2

Answer:

• The presence of apical bud inhibits the growth of lateral buds, this is called apical dominance.

• It is believed that the apical dominance is controlled by an auxin which is synthesized in the apical bud.

• Auxin migrates from apical bud to lateral buds. Higher concentration of auxin in apical bud suppresses the growth of lateral or axillary buds.

• When apical bud is removed, lateral buds grow and form branches.

• By removing apical bud, more branches can be produced in plants.