Question

Dormancy of seed is broken by

• A. Auxin
• B. Gibberellins
• C. Cytokinin
• D. Abscisic acid

Answer 1

Answer: (B)

Gibberellins

Gibberellins are the phytohormones that are responsible to break the seed dormancy and speed up the germination through the mobilization of the starch hydrolyzing enzymes present in the aleurone layer of the seed.

A. Auxins promote cell elongation and apical dominance.

B. Gibberellins promote seed germination.

C. Cytokinin promotes cell division and delay of senescence.

D. Abscisic acid is the stress hormone.

Hence, the correct answer is 'Gibberellins'