Question

Which of the following hormones can replace vernalization?
(a)Auxin
(b)Cytokinin
(c)Gibberellins
(d)Ethylene

Answer 1

Plant hormones can be defined as organic molecules produced in plants for regulating the growth and development of the plant. They are divisible into five major plant hormones which are Auxin, Cytokinin, Gibberellin, Ethylene, and Abscisic acid.

Complete answer:
Gibberellins are the most abundantly found plant hormones in plants. It helps in various factors such as it promotes stem elongation between nodes on the stem-like Corn and Pea.
It induces sudden shoot elongation followed by flowering, termed as bolting. For example: In Rosette plants.
Vernalization is the process of exposing plants to cold climate (naturally or artificially) to fasten the process of flowering in plants. After vernalization, quicker flowering can be observed in the plants. Gibberellic acid is a plant hormone that results in the process of vernalization that brings the rapid flowering in plants.

Additional information:
Auxin: Plant hormones can be defined as organic molecules that are produced in plants that help in regulating the growth and development of plant parts. These molecules control morphological, physiological, and biochemical responses in different parts of the plant. Auxin functions include inducing cell elongation, maintaining apical dominance, initiating root formation, preventing abscission, inducing parthenocarpy, and is also used as a herbicide in synthetic forms.
Cytokinesis: Cytokinesis can be described as a plant hormone. The term apical dominance can be defined as the suppression of growth of lateral buds by the auxins produced by the apical buds. It occurs due to plant hormone auxin produced in the tip of the shoot. It promotes apical dominance which means that it does not allow lateral/axillary buds to grow in the plant whereas on the other hand hormone named cytokinin is responsible for hurting the apical dominance. It promotes the growth of lateral buds.
Ethylene: Ethylene is a gaseous plant hormone. It acts as a growth inhibitor. Its main functions include the maturation and ripening of fruits. During the ripening of fruits, the synthesis of ethylene occurs in maximum concentration.

So, the correct answer is ‘Gibberellins’.

Note: Auxins are responsible for the delay in leaf senescence and ripening of the fruits in plants. It helps in the promotion of female characters in some flowers. Gibberellins institute 125 organic compounds that are structurally similar. To meet the needs of plants ethylene is provided in artificial ways.