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Identification of Crepenynic Acid in the Seed Oil of Atractylodes lancea and A. macrocephala

  • Original Paper
  • Published:
Journal of the American Oil Chemists' Society

Abstract

Atractylodes rhizome is widely used in traditional Chinese herbal medicine. Although the chemical composition of the root has been studied in detail, the oil content and fatty acid composition of the seeds of Atractylodes species have not been reported. Fatty acyl composition of seeds from Atractylodes lancea and A. macrocephala was determined by gas chromatography and mass spectrometry of fatty acid methyl esters and 3-pyridylcarbinol esters. The predominant fatty acid in the seeds of both species was linolenic acid, but the unusual acetylenic fatty acid, crepenynic acid (cis-9-octadecen-12-ynoic acid), was also observed at levels of 18% in A. lancea and 13–15% in A. macrocephala. Fatty acid content was 24% for the samples of A. lancea and 16–17% for samples from A. macrocephala. sn-1,3 regioselective lipase digestion of seed lipids revealed that crepenynic acid was absent from the sn-2 position of the seed triacylglycerol. Crepenynic acid was also found in the seed oil of Jurinea mollis at 24% and was not present in the sn-2 position of the TAG. A contrasting distribution of crepenynic acid was found in the oil of Crepis rubra, suggesting differences in crepenynic acid synthesis or TAG assembly between these species.

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Abbreviations

FAME(s):

Fatty acid methyl ester(s)

MAG:

Monoacylglycerol

TAG:

Triacylglycerol

X:Y ∆Z :

Where X is the chain length, Y is the number of double bonds and ∆Z is the double-bond position relative to the carboxyl end of the molecule

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Acknowledgements

This work was supported by the National Research Council Canada National Bioproducts Program, the National Natural Science Foundation of China (No. 31571708), the Provincial Natural Science Foundation of Shandong of China (No. ZR2015CM039), the Provincial Independent Innovation and Achievement Transformation Program of Shandong of China (No. 2014CGZH0712), and the Taishan Overseas Talents Introduction Program of Shandong, China (No. tshw20120747). We thank Dr Brent Pollock for critical review of the manuscript. NRC publication number 56306.

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Authors and Affiliations

  1. Key Laboratory of Agro-Products Processing Technology of Shandong Province, Institute of Agro-Food Science and Technology, Shandong Academy of Agricultural Sciences, Jinan, China

    Jin-Yue Sun & Xu Guo

  2. National Research Council of Canada, 110 Gymnasium Place, Saskatoon, SK, S7N 0W9, Canada

    Mark A. Smith

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  1. Jin-Yue Sun
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  2. Xu Guo
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  3. Mark A. Smith
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Correspondence to Mark A. Smith.

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Sun, JY., Guo, X. & Smith, M.A. Identification of Crepenynic Acid in the Seed Oil of Atractylodes lancea and A. macrocephala . J Am Oil Chem Soc 94, 655–660 (2017). https://doi.org/10.1007/s11746-017-2974-2

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  • DOI: https://doi.org/10.1007/s11746-017-2974-2

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