''Write the physiological responses of gibberellins in plants.

Explanation

(1) Gibberellins promote bolting (internode elongation just before flowering) in beet, cabbages and many plants with rosette habit.
(2) The ability to cause an increase in the length of axis is used to increase the length of grapes stalks.
(3) Gibberellins cause fruits like apple to elongate and improve their shape.
(4) Gibberellins delay senescence. Thus, fruits can be left on the tree longer so as to extend the market period.
(5) `GA_(3)` is used to speed up the malting process in brewing industry.
(6) Spraying Gibberellins on sugarcane crop increases the length of the stem , thus increasing the yield by as much as 20 tonnes per acre.
(7) Spraying juvenile conifers with Gibberellines fastens the maturity period, thus leading to early seed production.