Question
Biology Question on plant growth and development
Gibberellins promote
A
seed germination
B
seed dormancy
C
leaf fall
D
root elongation.
Answer
seed germination
Explanation
Solution
Gibberellins promote seed germination. Giberellins are weakly acidic growth hormones having ring structure and which cause cell elongation of intact plants in general and increased internodal length of genetically dwarfed plants. Giberellins are synthesized in the apical shoot buds, root tips and developing seeds. During seed germination, especially of cereals giberrellin stimulates the production of some messenger RNAs and then hydrolytic enzymes like amylases, lipases, proteases. The enzymes solubilize the reserve food of the seed.