Positional-Species Composition of Diacylglycerol Acetates from Mature Euonymus Seeds

The positional‐species composition (PSC) of 3‐acetyl‐1,2‐diacyl‐sn‐glycerols (AcDAGs) from the seeds of mature fruits of 14 species of the genus Euonymus L. was established. The residues of six major fatty acids (FAs), palmitic (P), stearic (St), hexadecenoic (H), octadecenoic (O), linoleic (L), and...

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Bibliographic Details
Published in:Chemistry & biodiversity 2016-06, Vol.13 (6), p.789-797
Main Authors: Sidorov, Roman A., Pchelkin, Vasily P., Zhukov, Anatoly V., Tsydendambaev, Vladimir D.
Format: Article
Language:English
Subjects:
2-diacyl-sn-glycerols
3-Acetyl-1
3‐Acetyl‐1,2‐diacyl‐sn‐glycerols
Acetates - analysis
Acetates - chemistry
Chemotaxonomy
Diglycerides - analysis
Diglycerides - chemistry
Euonymus
Euonymus - chemistry
Euonymus species
Fatty acids
Fruit - chemistry
Positional-species composition
Seeds
Seeds - chemistry
Taxonomic position
Type-species composition
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Summary:The positional‐species composition (PSC) of 3‐acetyl‐1,2‐diacyl‐sn‐glycerols (AcDAGs) from the seeds of mature fruits of 14 species of the genus Euonymus L. was established. The residues of six major fatty acids (FAs), palmitic (P), stearic (St), hexadecenoic (H), octadecenoic (O), linoleic (L), and linolenic (Ln), were present in the AcDAGs. Here, we demonstrated that the profile of PSC of AcDAGs could serve as chemotaxonomic factor to divide euonymus species studied here into groups which completely correlate with the present day systematic of the genus. In particular, the Euonymus section greatly exceeded other sections of the Euonymus subgenus as well as the Kalonymus one in the total levels of AcDAGs positional species having one and two O residues and was characterized by significantly lesser concentrations of species with one and two L residues. Moreover, in seed, AcDAGs of almost all Euonymus species EFL values were slightly higher than EFO ones, but all EFL and EFO values were higher than 1.0, and therefore, it can be concluded that both FAs mainly esterified sn‐2‐position of the glycerol moiety and saturated FAs residues were always virtually absent in the sn‐2 position of Euonymus seed AcDAGs, as it is also the case in nearly all TAGs molecules of plant origin.
ISSN:1612-1872
1612-1880
DOI:10.1002/cbdv.201500269