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PLANT GROWTH REGULATOR
Plant hormones (or plant growth regulators, or PGRs) are internally-secreted chemicals in plants that are used for regulating the plants' growth. According to a standard definition, plant hormones 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:
- auxins
- cytokinins(CK’s)
- ethylene
- gibberellins (GA’s)
- abscisic acid (ABA)
Additional suggested hormone classes:
- brassinosteroids (BA’s)
- jasmonates (JA’s)
- salicylates (SA’s)
- polyamines are major classes.
- florigen
- traumatic acid
See also
External links
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