Question

Which of the following plant hormone induces dormancy of seeds?

Answer 1

Abscisic acid or ABA is a growth inhibitor. It controls the dormancy of the embryo in the seed, the dropping of leaves and fruits, wilting of the leaves, flowering etc. It helps the plant to survive in adverse conditions.

Auxins, gibberellins and cytokinins are the plant growth promoters that induce cell division, cell enlargement, flowering, fruiting, etc. Ethylene can be both, a plant growth promoter and an inhibitor.