Question

___________ hormone breaks the dormancy of a potato tuber.

• A. Auxin
• B. Gibberellin
• C. Cytokinin
• D. Abscisic Acid

Answer 1

The correct option is B Gibberellin

Potato tuber is the thickened part of a stem. When the potato tubers are harvested they are in a dormant state. Dormancy is the condition of seeds that are incapable of germinating even when the conditions suitable for seedling growth are supplied.
Gibberellin hormone helps in breaking dormancy of a potato tuber. Tubers of potato reproduce vegetatively to give rise to new plants.
Auxins are plant growth promoters that are usually found in the growing apices of stems and roots.
Cytokinin is a plant growth promoter that helps to produce new leaves, chloroplast in leaves, and lateral shoot growth.
Abscisic acid is a plant growth inhibitor that plays an important role in seed development, maturation and dormancy. It induces dormancy and acts as an antagonist to gibberellins.