Positional‐Species Composition of Triacylglycerols from the Arils of Mature Euonymus Fruits. (21st October 2014)

• Record Type: Journal Article
• Authors: Sidorov, Roman A.; Pchelkin, Vasily P.; Zhukov, Anatoly V.; Vereshchagin, Andrei G.; Tsydendambaev, Vladimir D.
• Is Part Of: Journal of the American Oil Chemists' Society. Volume 91:Number 12(2014)
• Page Start: 2053
• Page End: 2063
• Publication Date: 2014-10-21
• Subjects: Euonymus species -- 1, 2, 3‐Triacyl‐sn‐glycerols -- Positional‐species composition -- Type‐species composition -- Fatty acids -- Taxonomic position; Oils and fats -- Periodicals; Soap -- Periodicals; Fats -- Periodicals; Food-Processing Industry -- Periodicals; Acides gras -- Périodiques; Aliments -- Industrie et commerce -- Périodiques; Huiles et graisses -- Périodiques; Savon -- Périodiques; Oliën; Chemie; Oils and fats; Soap; Periodicals; 547.77
• DOI: 10.1007/s11746-014-2553-8
• Languages: English
• ISSNs: 0003-021X

Abstract

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 inUUU 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.