Question
Biology Question on plant growth and development
Which hormone breaks dormancy of potato tuber?
A
gibberellin
B
IAA
C
ABA
D
zeatin.
Answer
gibberellin
Explanation
Solution
Abscisic acid is a growth inhibiting phytohormone. It induces senescence in leaves by promoting the degradation of chlorophyll and proteins. Auxin is a growth promoting phytohomone that results in cell division, cell enlargement and apical dominance. Cytokinin is a growth promoting phytohormone that causes cell division, morphogenesis and seedling growth. Gibberellins are growth promoting phytohormone that results in overcoming seed dormancy and bolting.