Which of the following plant hormones inhibits growth?

Correct option is D

(d) Abscisic acid

Sol.Abscisic acid (ABA) is a plant hormone that inhibits growth and promotes responses to stress, seed dormancy, and leaf abscission. It plays a crucial role in closing stomata during water stress.

Information Booster:

• Auxin: Promotes cell elongation, root growth, and apical dominance.
• Cytokinin: Stimulates cell division and delays leaf senescence.
• Gibberellin: Promotes stem elongation, seed germination, and fruit development.
• Abscisic acid (ABA): Helps plants survive during drought conditions by closing stomata.

Additional Information:

• ABA is known as the “stress hormone” of plants.
• It helps in the formation of winter buds in trees.
• Excess ABA leads to plant dormancy.