Question

Which hormone is called stress hormone in plants?

Answer 1

Abscisic acid:

• Abscisic acid is a plant growth inhibitor because it suppresses or retards the growth of plants.
• Abscisic acid is the plant stress hormone because it induces plants to respond differently under different stress conditions.
• It can induce seed dormancy under unfavorable conditions, stimulate stomata closure in drought conditions, and abscission of leaves and fruits at the end of the growing season.