plant hormone that stimulates stomatal closure and promotes seed and bud dormancy. Inhibits shoot growth but may promote root growth. Plays a role in wounding responses and in abscission ~ of leaves and fruit.
|Systematic IUPAC name
(2Z,4E)-(S)-5-(1-Hydroxy-2,6,6-trimethyl-4-oxo-2-cyclohexen-1-yl)-3-methyl-2,4-pentanedienoic acid
|3D model (Jmol)||Interactive image|
|Molar mass||264.32 g·mol−1|
|Melting point||163 °C (325 °F; 436 K)|
|Boiling point||458.7 °C (857.7 °F; 731.8 K) sublimes|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
Abscisic acid (ABA), also known as Dormin, Dormic acid (DMA), is best known as a plant hormone. ABA functions in many plant developmental processes, including bud dormancy. It is degraded by the enzyme (+)-abscisic acid 8'-hydroxylase into phaseic acid.