Description
🌻 Gibberellic Acid GA₇ — a minor gibberellin more active than GA₃ in some bioassays; used for conifer embryo development and orchid elongation where GA₃ is less effective.
| 🧪 CAS | 510-75-8 | ⚖️ MW | 346.38 g/mol |
| 🔬 Grade | TC / Research | 🌡️ Storage | −20 °C, protected from light |
⚗️ GA₇ vs GA₃
GA₇ has a different A/B ring double bond arrangement that makes it more biologically active in some plant systems — particularly conifer embryogenesis and some orchid PLB elongation protocols. The same autoclave instability applies — always filter-sterilise.
🌱 Applications
| Use | Concentration | Notes |
|---|---|---|
| Conifer somatic embryo maturation | 0.5–5 µM GA₇ + ABA | Better than GA₃ for conifers |
| Orchid PLB → shoot elongation | 0.5–2 mg/L | Some genera prefer GA₇ |
| Elongation of stunted monocot shoots | 0.1–1 mg/L | Trial vs GA₃ |
🧪 Stock prep
Dissolve in 70% ethanol. Filter-sterilise — do not autoclave. Store at −20 °C, foil-wrapped.
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