Cell elongation in internode regions of the green plants takes place due to- A. Ethylene B. Indole acetic acid C. Cytokinin D. Gibberellins
Option D. Gibberellin is the growth regulator that regulates the developmental cycle of higher plants. It stimulates the cell elongation in the internodal region by altering the rheological property of the cell wall and as a result, the cell gets lengthen.
