Pruning of plants promotes branching because the axillary buds get sensitized to

Options

A. Ethylene
B. gibberellin
C. Cytokinin
D. Indole acetic acid.

Answer

C

Explanation

Cytokinins are a group of phenyl urea derivatives of adenine,one of the molecules in DNA during pruning axillary bud,which is under repression due to effect of auxin,get sensitized to cytokinin,which releases it from apical dominance.
Cytokinin functions
Cytokinins promote cytokinesis,They are found primarily in root meristems,embryos and fruits,and migrate from roots to the shoot system of plants in xylem tissue.
Cytokinins can promote axillary bud growth by over-riding the apparent inhibiting effect of auxin.This is one of the ways in which plants balance root and shoot growth.shoot tip auxins inhibit lateral bud activation,Cytokinins produced in root meristems travel upward in xylem and if in higher concentration counter upward in xylem and if in higher concentration counter the inhibition of auxins to activate lateral buds.
Cytokinins also retard leaf synthesis and delaying degradution of chlorophyll.