Question

Select the activities associated with gibberellins.
$\left(a\right)$ Apical dominance
$\left(b\right)$ Good herbicides
$\left(c\right)$ Promote bolting
$\left(d\right)$ Delay senescence
$\left(e\right)$ Stimulate closure of stomata.

• A. $a$ and $b$ only
• B. $b$ and $c$ only
• C. $b$ and $d$ only
• D. $c$ and $d$ only
• E. $a$, $c$ and $d$ only

Answer 1

Answer: (D)

$c$ and $d$ only

Gibberellin is a plant hormone. It is plant growth regulator. It is involved in various processes like stem elongation, germination, flowering. The rapid growth and flowering with cell division and cell elongation is called as bolting. Bolting requires either long days or cold treatment. Bolting can be induced by higher level of gibberellin under normal conditions. It delays senescence of leaves and fruits.

Thus, the correct answer is option D.