Question

state the main functoin of abscisic acid.

Answer 1

Abscisic acid (ABA) is a  plant hormone which functions mainly as a growth inhibitor. Abscisic acid promotes the dormancy in seeds and buds [ this is the opposite of breaking the dormancy]. It also promotes closing of stomata. Abscisic acid promotes falling of leaves. 

Answer 2

Abscisic acid is a plant Hormone which functions mainly as a growth inhibitor