Question

Which of the following is not a plant growth promoter?

• A. Auxin
• B. Gibberellin
• C. Cytokinin
• D. Abscisic acid

Answer 1

The correct option is D Abscisic acid

Plant growth promoters are the substances that help in the overall growth of the plants. They help in growth-promoting activities like cell division, cell enlargement, pattern formation, tropic growth, producing flowers, fruits, and seeds. Auxin, gibberellin, and cytokinin are growth-promoting hormones in plants.

Abscisic acid is a plant growth inhibitor. It does various growth-inhibiting activities like dormancy and abscission. Dormancy is a condition when the growth and development in plants are temporarily stopped. Abscission is a process in which the leaves, flowers, and fruits are dropped off naturally from the parent plants.