Abscisic Acid

Abscisic Acid, or ABA, is one of several Plant Growth Regulators, or PGRs.

Abscisic Acid is so named due to its involvement in leaf abscision, though other functions have since been discovered. ABA is known to be vital in early embryonic development, and plants deficient in ABA have been known to form yellowy leaves. ABA is important in the stomata and roots, where it is responsible for interpreting environmental stress - when a plant is in a low-water environment, ABA levels increase, and chemical translocation occurs. This increase and translocation causes the plants stomata to close, preventing water loss through the leaves, effectively adapting the plant to a drier environment.

ABA is biosynthesized in the plastids. It is produced in response to stressors such as excess heat and salt, and is present in all parts of the plant.

Known Antagonists
Known antagonists of ABA include Cytokinins, such as Kinetin.

PhytoTech Products
Abscisic Acid (ABA) is available from PhytoTechnology Laboratories as Product Number A102.

Kinetin is available from PhytoTechnology Laboratories as Product Number K750.

A Solution of Kinetin is available from PhytoTechnology Laboratories as Product Number K483.