Question

Genetic dwarfism can be overcome by treating with
(a) Cytokinin
(b) Auxins
(c) Gibberellins
(d) Ethylene

Answer 1

Hint: They are those hormones that delay in ripening and improve the shape of the fruits. This hormone is also responsible for the rapid process of maturity and also leads to the elongation of plants overcoming dwarfness.

Complete answer:
In the rosette plants, gibberellins increase the length of the plant’s stem. The process of formation of internode and production of new leaves before the process of elongation is known as bolting. Before the process of reproduction, adding or spray gibberellins to the plants will result in the process of bolting. The addition of gibberellins to the plants results in the elongation of fruits and their shapes and sizes. This may also increase the pace of the process of mating.
Auxin: They are the plant hormones that are organic molecules produced in the plants. They help in the growth and regulation of the plant parts. It helps in the induction of elongation, parthenocarpy, apical dominance, prevent abscission, and is used as an herbicide.
Cytokinesis: They are the plant hormone that helps in the process of the promotion of the apical dominance resulting in no lateral or axillary growth.
Ethylene: It is a gaseous plant hormone that acts as a growth inhibitor. It helps in the ripening and the maturation of the fruits.

So, the correct answer is ‘Gibberellins’.

Note:
Gibberellins have named the phytohormones and are known for so long now. They were first discovered from the fungus Gibberella fujikuroi in Japan.
This was isolated in 1935 by Yabuta and sanuki as it was isolated from its extract from the rice plant that accused foolish seedling disease of rice. This fungus was extracted by E. Kurosawa and was found to be an active substance from a fungal extract.