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OxygenatedTrans-3-olefinic acids in aStenachaenium seed oil
R Kleiman1, G F Spencer1, L W Tjarks1
1Northern Regional Research Laboratory, 61604, Peoria, Illinois.
Lipids
|August 14, 2016
Summary
Seed oils from Stenachaenium macrocephalum show significant differences based on storage. One sample contained novel oxygenated fatty acids, including a new epoxy acid, not found in the other sample.
Area of Science:
- Plant biochemistry
- Lipid chemistry
- Organic chemistry
Background:
- Seed oils are crucial sources of fatty acids.
- Stenachaenium macrocephalum is a plant species from the Compositae family.
- Storage conditions can influence the chemical composition of seed oils.
Purpose of the Study:
- To investigate the chemical differences in seed oils from Stenachaenium macrocephalum.
- To identify and characterize novel fatty acids in plant seed oils.
- To understand the impact of storage history on seed oil composition.
Main Methods:
- Gas chromatography-mass spectrometry (GC-MS) for fatty acid profiling.
- Nuclear magnetic resonance (NMR) spectroscopy for structural elucidation of new compounds.
- Comparative analysis of oil composition from samples with different storage histories.
Main Results:
- Two Stenachaenium macrocephalum seed oil samples exhibited distinct compositions.
- One sample contained significant levels (6.5% epoxy acids, 5.6% hydroxy conjugated dienoic acids) of oxygenated fatty acids.
- A previously unknown epoxy acid, cis-9, 10-epoxy-trans-3,cis-12-octadecadienoic acid (4.0%), and two novel hydroxy acids were identified.
Conclusions:
- Storage history significantly impacts the fatty acid profile of Stenachaenium macrocephalum seed oil.
- Novel oxygenated fatty acids can accumulate in plant seed oils under specific conditions.
- The findings contribute to the understanding of plant lipid metabolism and seed oil variability.
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