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Positional-Species Composition of Triacylglycerols from the Arils of Mature Euonymus Fruits

  • Original Paper
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Journal of the American Oil Chemists' Society

Abstract

Positional-species composition (PSC) of 1,2,3-triacyl-sn-glycerols (TAG) from the arils of mature fruits of 13 species of Euonymus L. genus was established. The residues of six major fatty acids (FA), palmitic, stearic, hexadecenoic (H), octadecenoic (O), linoleic (L), and linolenic, were present in the TAG. PSC of TAG was determined by their partial lipase hydrolysis. By using hierarchical cluster and principal component analyses, it was definitely demonstrated that separate taxonomic units forming this genus were significantly distinguished as regards PSC of TAG. In particular, the Euonymus subgenus greatly exceeded the Kalonymus subgenus in both total content of L in TAG and in the rate of its incorporation into their mid-position, while TAG of Kalonymus were marked by a prevalence of O-TAG and sn-2-O isomers. Thus, these subgenera were significantly distinct in the rate of incorporation of O and L residues in the sn-2 position of TAG molecules. Meanwhile, the TAG from the Euonymus section species were marked by an enhanced concentration of H and the incorporation of H in UUU TAG was much more active than in other TAG types. As for positional-type composition of TAG, saturated FA were always virtually absent in the sn-2 position of Euonymus aril TAG.

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Abbreviations

A:

Octadecenoic or linoleic acid

DAG:

Diacylglycerol

EF:

Enrichment factor

FA:

Fatty acid

FAME:

FA methyl ester

H:

Hexadecenoic

L:

Linoleic

Ln:

Linolenic

O:

Octadecenoic

P:

Palmitic

PCA:

Principal component analysis

PSC:

Positional-species composition

PTC:

Positional-type composition

RRD:

2-Random 1,3-random distribution

S:

Total saturated FA

SD:

Standard deviation

SF:

Selectivity factor

St:

Stearic

TAG:

1,2,3-Triacyl-sn-glycerol

U:

Total unsaturated FA

U2 :

U content in sn-2 position of TAG

UT :

U content in sn-1,2,3 positions of TAG

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Authors and Affiliations

  1. Laboratory of Lipid Metabolism, K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya 35, Moscow, 127276, Russia

    Roman A. Sidorov, Vasily P. Pchelkin, Anatoly V. Zhukov, Andrei G. Vereshchagin & Vladimir D. Tsydendambaev

Authors
  1. Roman A. Sidorov
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  2. Vasily P. Pchelkin
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  3. Anatoly V. Zhukov
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  4. Andrei G. Vereshchagin
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  5. Vladimir D. Tsydendambaev
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Correspondence to Roman A. Sidorov.

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Deceased: A. G. Vereshchagin.

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Sidorov, R.A., Pchelkin, V.P., Zhukov, A.V. et al. Positional-Species Composition of Triacylglycerols from the Arils of Mature Euonymus Fruits. J Am Oil Chem Soc 91, 2053–2063 (2014). https://doi.org/10.1007/s11746-014-2553-8

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  • DOI: https://doi.org/10.1007/s11746-014-2553-8

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