Question

The hormone which retards the abscission is

• A. Auxin
• B. Abscisic acid
• C. Ethylene
• D. Both A and B

Answer 1

The correct option is A Auxin

Abscission is a term used in several areas of biology to mean shedding of various parts of an organism. In plant sciences, it is most commonly refers to the process by which a plant drops one or more of its parts, such as leaf, fruit, flower or seed. Auxin retards abscission of leaves and fruits but when auxin levels in the leaf declines, the tissues becomes sensitive to ethylene that promotes abscission.

So, the correct answer is option A.