which of the following reduces plant growth and induces dormancy?

1. cytokinin
2. auxin
3. xylene
4. abscisic acid

Functions of Abscisic Acid

• Stimulates the closure of stomata (water stress brings about an increase in ABA synthesis).
• Inhibits shoot growth but will not have as much affect on roots or may even promote growth of roots.
• Induces seeds to synthesize storage proteins.
• Inhibits the affect of gibberellins on stimulating de novo synthesis of a-amylase.
• Has some effect on induction and maintanance of dormancy.
• Induces gene transcription especially for proteinase inhibitors in response to wounding which may explain an apparent role in pathogen defense.