Abscisic Acid CAS 21293-29-8,Abscisic Acid, CAS 21293-29-8
CAS : 21293-29-8
Formula : C15H20O4
Mol. wt. : 264.32
EINECS : 244-319-5
| CAS | 21293-29-8 |
| Molecular formula | C15H20O4 |
| Molecular weight | 264.32 |
| EIENCS | 244-319-5 |
| Form | / |
| Melting point | 188 °C |
| boling point | 327.55°C (rough estimate) |
| Density | 1.0583 (rough estimate) |
| Solubility | |
| PKA | / |
| Color | / |
| Storage temp |
Physiological functions and mechanisms of action
Core physiological functions
Adversity response
Under drought and salt stress, it accumulates rapidly, induces stomatal closure to reduce water loss, and activates stress-resistant genes (such as proline synthase).
Under low-temperature stress, the expression of cold-resistant genes is initiated, enhancing the stability of cell membranes (for instance, the survival rate of winter wheat increases by 45%).
Growth regulation
Inhibit seed germination and seedling growth, and maintain seed dormancy (such as peach and rose seeds).
Promote organ shedding (leaves, fruits) and the formation of dormant buds (such as potato tuber induction).
Developmental regulation
The seed maturation period promotes the accumulation of stored proteins and sugars and inhibits germination on the spike.
Mechanism of action
Signal transduction: It regulates stomatal motility through changes in intracellular Ca²⁺ concentration and relies on the second messenger system.
Gene expression: Activate stress response genes (such as RD29A, COR15A), and enhance the activity of antioxidant enzymes (such as APX, GSH).
Agriculture and Horticulture
Stress resistance and increased production
Wheat seed soaking (10⁻⁶ M) increased the overwintering survival rate to 96.3% (compared with only 51.4% in the control).
Spraying on corn and sorghum seedlings can enhance their drought resistance and ensure their survival under drought for 10 to 20 days.
Seed storage: Inhibit seed germination (reversible treatment) and extend the storage period.
Tissue culture
The addition of ABA in alfalfa embryo culture can increase the mature plant rate.
Cucumber cotyledons induce adventitious roots (add 0.1-10 mg/L to MS medium).
Medicine and Industry
Medical potential: Anti-inflammatory and hypoglycemic (animal experiment stage), further clinical verification is needed.
Food preservation: Inhibiting the growth of bacteria/mold (such as cheese, sausages).
Safety and operation norms
Toxicity: Low toxicity (oral LD₅₀ >3160 mg/kg in rats), mild irritation to the skin, moderate irritation to the eyes.
Environmental risk: Highly toxic to aquatic organisms (48 hours LC₅₀ = 180 mg/L for carp), avoid water pollution.
Storage and transportation
Store in a light-proof and sealed container at -20℃ (the solution should be protected from evaporation).
Transport label: UN 2811 (Toxic Substance), strictly prohibited to be transported together with food.
Operation protection: Dust masks, goggles and chemical protective gloves are required. Operate in a well-ventilated environment.
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