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NADES Compounds Identified in Hypoxis hemerocallidea Corms during Dormancy
Motiki M Mofokeng1,2, Gerhard Prinsloo3, Hintsa T Araya1
1Agricultural Research Council-Vegetable, Industrial and Medicinal Plants (ARC-VIMP), Private Bag X293, Pretoria 0001, South Africa.
Plants (Basel, Switzerland)
|September 23, 2022
Summary
Soaking Hypoxis hemerocallidea corms released inhibitory compounds, including choline and succinate, which are Natural Deep Eutectic Solvents (NADES). This finding offers new strategies for the medicinal plant's propagation and sustainable use.
Area of Science:
- Plant Physiology
- Medicinal Botany
- Natural Product Chemistry
Background:
- Hypoxis hemerocallidea corm soaking enhances propagation, indicating inhibitory compound leaching.
- Understanding these compounds is crucial for optimizing medicinal plant cultivation.
Purpose of the Study:
- To identify inhibitory chemical compounds present in Hypoxis hemerocallidea corm leachate.
- To explore the role of these compounds in bud dormancy and plant propagation.
Main Methods:
- Nuclear Magnetic Resonance (NMR) spectroscopy (600 MHz 1H-NMR) was used to analyze leachate from dormant H. hemerocallidea corms.
- Identification of specific chemical constituents within the leachate.
Main Results:
- The leachate contained choline, succinate, propylene glycol, and lactose.
- These identified compounds are classified as Natural Deep Eutectic Solvents (NADES).
- NADES have the potential to inhibit bud growth and development, contributing to dormancy.
Conclusions:
- The study identified key inhibitory NADES in H. hemerocallidea corms, explaining dormancy.
- Leaching of these compounds, alongside phytohormone shifts, likely breaks dormancy naturally.
- Findings open new avenues for H. hemerocallidea vegetative propagation and sustainable medicinal use.
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