Question

Petioles of leaves are weakened by which hormones? 0 control and coordination

Answer 1

Leaf abscission takes place at the base of the petiole which is internally marked by a dis­tinct zone of few layers of thin-walled cells arranged transversally across the petiolar base. This zone it called as the abscission zone or abscission layer.

Answer 2

Answer:

Abscisic acid is the correct answer

Explanation:

Abscisic acid (ABA) is a plant growth regulator that derived its name because it was initially thought to be responsible for abscission (leaves or fruits falling from the plants). Abscisic acid inhibits growth and so works antagonistically to auxins and gibberellins