abscisic acid

/abscisic acid

abscisic acid

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.

Merriam-Webster Online Dictionary
abscisic acid (noun)
a plant hormone CHO that is a sesquiterpene widespread in nature and that typically promotes leaf abscission and dormancy and has an inhibitory effect on cell elongation - 15 20 4
abscisic acid
abscisic acid (Wikipedia)
Abscisic acid
Stereo, skeletal formula of abscisic acid
Names
Systematic IUPAC name
(2Z,4E)-5-[(1S)-1-hydroxy-2,6,6-trimethyl-4-oxocyclohex-2-en-1-yl]-3-methylpenta-2,4-dienoic acid
Other names
(2Z,4E)-(S)-5-(1-Hydroxy-2,6,6-trimethyl-4-oxo-2-cyclohexen-1-yl)-3-methyl-2,4-pentanedienoic acid[citation needed]
Identifiers
21293-29-8 YesY
3D model (Jmol) Interactive image
3DMet B00898
Abbreviations ABA
2698956
ChEBI CHEBI:2635 N
ChEMBL ChEMBL288040 YesY
ChemSpider 4444418 YesY
ECHA InfoCard 100.040.275
EC Number 244-319-5
MeSH Abscisic+Acid
PubChem 5280896
RTECS number RZ2475100
Properties
C15H20O4
Molar mass 264.32 g·mol−1
Appearance Colorless crystals
Density 1.193 g/mL
Melting point 163 °C (325 °F; 436 K)
Boiling point 458.7 °C (857.7 °F; 731.8 K) sublimes
log P 1.896
Acidity (pKa) 4.868
Basicity (pKb) 9.129
Hazards
S-phrases S22, S24/25
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YesYN ?)
Infobox references

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.

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