Hormone responsible for Dormancy

Dormancy is the state of the plant where it ceases to grow and remains in a state of rest. Dormancy is essential for the survival of the plant under adverse conditions such as drought, cold, or unfavorable seasons. The hormone responsible for dormancy is ABA or Abscisic Acid.

Role of ABA in Dormancy

ABA is produced in the mature leaves of the plant and transported to the dormant buds or seeds. ABA is responsible for inhibiting the cell division and growth of the plant, leading to dormancy. It also helps in the accumulation of reserves in the plant, which are used for growth and development after the dormancy period is over.

Mechanism of ABA action

- ABA binds to the receptors in the cell membrane of the plant cells and activates the signaling pathway.
- This signaling pathway leads to the inhibition of the enzymes responsible for the breakdown of reserve materials.
- ABA also promotes the synthesis of storage proteins and lipids, which are used for growth and development after the dormancy period is over.
- ABA inhibits the synthesis of gibberellins, which are responsible for the growth of the plant.
- ABA also regulates the water balance in the plant, which is essential for survival during adverse conditions.

Conclusion

In conclusion, ABA is the hormone responsible for dormancy in plants. It plays a crucial role in the survival of the plant during adverse conditions. ABA inhibits cell division and growth, promotes the accumulation of reserves, regulates water balance, and inhibits the synthesis of gibberellins.