Which of the following is not associated with growth of plant?(a) Auxin(b) Gibberellins(c) Cytokinins(d) Abscisic acid

To determine which of the options is not associated with the growth of plants, we need to understand the role of each of them.

(a) Auxin: Auxin is a plant hormone that plays a crucial role in promoting cell elongation and growth. It is responsible for various plant growth processes, such as phototropism and gravitropism.

(b) Gibberellins: Gibberellins are plant hormones that are involved in promoting stem elongation, seed germination, and flowering. They stimulate cell division and elongation, leading to overall plant growth.

(c) Cytokinins: Cytokinins are plant hormones that primarily regulate cell division and differentiation. They promote the growth of lateral buds, delay senescence, and stimulate the formation of new shoots and leaves.

(d) Abscisic acid: Unlike the other options, abscisic acid (ABA) is not directly associated with promoting plant growth. Instead, it is involved in regulating various physiological processes, such as seed dormancy, stomatal closure, and stress responses. ABA inhibits growth and promotes dormancy during unfavorable conditions.

Therefore, the correct answer is (d) Abscisic acid, as it is not directly associated with the growth of plants.