Plant Hormones

Plant Hormones are any of various hormones produced by plants that control or regulate germination, growth, metabolism, or other physiological activities. Also called phytohormone.

There are many different types of plant hormones, such as; Auxins, Giberellins, Ethylene, Cytokinetins, Florigen, and Abscisic acid.

The fucnctions and description of Abscisic acid follows.
Stimulates the closure of stomata (water stress brings about an increase in ABA synthesis). It inhibits shoot growth but will not have as much affect on roots or it might 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.

The functions of Auxins are: Stimula...