Plant hormone

From Freepedia

Plant hormones (or plant growth regulators, or PGRs) are internally secreted chemicals in plants that are used for regulating their growth. According to a standard definition, they are signal molecules produced at specific locations, occur in low concentrations, and cause altered processes in target cells at other locations.

It is accepted that there are five major classes of plant hormones:

1. auxins
2. cytokinins(CK’s)
3. ethylene
4. gibberellins (GA’s)
5. abscisic acid (ABA)

Additional suggested hormone classes:

1. brassinosteroids (BA’s)
2. jasmonates (JA’s)
3. salicylates (SA’s)
4. polyamines are major classes.

External Links

• The Top Plant Hormone (Non-Theory) Site on The Web
• Another Good Site
• PowerPoint Presentation That's A Good Simple Introduction
• A Start at a General Plant Hormone Theory (Material in Theory Section Is Based on This Link)
• Sidwell Friends Plant Hormone Table - The Inspiration of the Plant Hormone Tables in Wikipedia and in the Article Above
• Hormonal Regulation of Gene Expression and Development - Detailed Intro Including Genetic Information