Question

Genetic dwarfism can be overcome by treating the plant with :
A) Cytokinin
B) Gibberellic acid
C) Auxin
D) Anti Gibberellin

Answer 1

Hint:Dwarfism occurs when an organism is extremely small.It also occurs in plants.It is due to the genetic reason.Growth promoting hormone causes the dwarfism to stop.And cause the increase in height of organisms.


Complete answer:
>Gibberellins are a kind of promoting plant growth regulators . Which are used for promoting plant growth.
>There are more than a hundred gibberellins reported from widely different organisms such as fungi and higher plants.They are denoted as GA1 , GA2 ,GA3 and so on.
>However gibberellic acid GA3 was one of the first gibberellins to be discovered and remains the most intensively studied form.All GAs are acidic.
>Gibberellic produces a wide range of physiological responses in the plants.Their ability to cause an increase in length of access is used to increase the length of grape stalks.
>Sugarcane stores carbohydrates as sugars in their stems.Spring sugarcane crop with gibberellins increases the length of the stem thus increasing the height by as much as 20 tons per acre.
>Gibberellic also promotes bolting which means internode elongation just prior to flowering in beet , cabbages and many other plants with rosette habit.
>The main function of gibberellic is to increase the height of the plant .Due to this reason genetic dwarfism can be overcome by gibberellic acid.

Hence the correct answer is option ‘D’.

Note:Gibberellic acid also is used to delay senescence . Due to which the fruits can be left on the tree longer so as to extend the market period.