Question

Describe abscissic acid physiological effects.

Answer 1

1. Abscisic acid has an effect on abscission and dormancy.
2. ABA hastens the ageing of leaves, flowers, and fruits.
3. It is a stress hormone since it is produced under drought and other adverse weather conditions.
4. ABA causes seeds, buds, and tubers to go dormant.
5. It serves as a growth inhibitor, slowing growth.
6. ABA is important in preventing transpiration by shutting stomata.
7. It slows and delays cell division and lowers cambial activity in the vascular cambium by suppressing mitosis.
8. ABA suppresses blooming in LDP while stimulating blossoming in short-day plants. (SDP)