Journal of Ginseng Research

The Korean Society of Ginseng (고려인삼학회)
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C/N/O/S stable isotopic and chemometric analyses for determining the geographical origin of Panax ginseng cultivated in Korea

  • Chung, Ill-Min (Department of Crop Science, College of Sanghuh Life Science, Konkuk University) ;
  • Kim, Jae-Kwang (Division of Life Sciences, College of Life Sciences and Bioengineering, Incheon National University) ;
  • Lee, Ji-Hee (Department of Crop Science, College of Sanghuh Life Science, Konkuk University) ;
  • An, Min-Jeong (Department of Crop Science, College of Sanghuh Life Science, Konkuk University) ;
  • Lee, Kyoung-Jin (Department of Crop Science, College of Sanghuh Life Science, Konkuk University) ;
  • Park, Sung-Kyu (Department of Crop Science, College of Sanghuh Life Science, Konkuk University) ;
  • Kim, Jang-Uk (Department of Herbal Crop Research, National Institute of Horticultural and Herbal Science, Rural Development Administration) ;
  • Kim, Mi-Jung (R&D Coordination Division, Rural Development Administration) ;
  • Kim, Seung-Hyun (Department of Crop Science, College of Sanghuh Life Science, Konkuk University)
  • Received : 2017.03.17
  • Accepted : 2017.06.08
  • Published : 2018.10.15
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Abstract

Background: The geographical origin of Panax ginseng Meyer, a valuable medicinal plant, is important to both ginseng producers and consumers in the context of economic profit and human health benefits. We, therefore, aimed to discriminate between the cultivation regions of ginseng using the stable isotope ratios of C, N, O, and S, which are abundant bioelements in living organisms. Methods: Six Korean ginseng cultivars (3-yr-old roots) were collected from five different regions in Korea. The C, N, O, and S stable isotope ratios in ginseng roots were measured by isotope ratio mass spectrometry, and then these isotope ratio profiles were statistically analyzed using chemometrics. Results: The various isotope ratios found in P. ginseng roots were significantly influenced by region, cultivar, and the interactions between these two factors ($p{\leq}0.001$). The variation in ${\delta}^{15}N$ and ${\delta}^{13}C$ in ginseng roots was significant for discriminating between different ginseng cultivation regions, and ${\delta}^{18}O$ and ${\delta}^{34}S$ were also affected by both altitude and proximity to coastal areas. Chemometric model results tested in this study provided discrimination between the majority of different cultivation regions. Based on the external validation, this chemometric model also showed good model performance ($R^2=0.853$ and $Q^2=0.738$). Conclusion: Our case study elucidates the variation of C, N, O, and S stable isotope ratios in ginseng root depending on cultivation region. Hence, the analysis of stable isotope ratios is a suitable tool for discrimination between the regional origins of ginseng samples from Korea, with potential application to other countries.

Keywords

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