Question

Why is abscisic acid also known as stress hormone?

Answer 1

Answer:

• Abscisic acid is called stress hormones as it induces various responses in plants against stress conditions.
• It increases the tolerance of plants toward various stresses.
• It induces the closure of the stomata during water stress.
• It promotes seed dormancy and ensures seed germination during favourable conditions.
• It helps seeds withstand desiccation.
• It also helps in inducing dormancy in plants at the end of the growing season and promotes abscission of leaves, fruits, and flowers.