A short-term, hydroponic-culture of ginseng results in a significant increase in the anti-oxidative activity and bioacti

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A short-term, hydroponic-culture of ginseng results in a significant increase in the anti-oxidative activity and bioactive components Ji Yun Lee1 • Hee Yang1,2 • Tae Kyung Lee1 • Chang Hyung Lee1 • Ji Won Seo1 • Jong-Eun Kim3 • Seo Yeong Kim2 • Jung Han Yoon Park1,2 Ki Won Lee1,2



Received: 31 May 2019 / Revised: 20 January 2020 / Accepted: 23 January 2020 Ó The Author(s) 2020

Abstract Panax ginseng CA Meyer has a variety of biological effects, including antioxidant and antidiabetic activities. Ginseng requires long-term cultivation, but this can be shortened using hydroponic systems to facilitate the commercial development of ginseng as a functional food. However, the characteristics of short-term-cultured (\ 30 days) hydroponic ginseng (sHCG) are unclear. We investigated the characteristics of 21-day-cultured sHCG compared 5-year-old normally cultured ginseng. The free radical-scavenging activity and total ginsenoside and phenolic contents were significantly higher in sHCG than in normally cultured ginseng. Fifteen ginsenosides were detected in sHCG, and the concentrations of most were higher in shoots than roots. These findings suggest that 21-day-cultured sHCG, due to its enhanced antioxidant activity and higher concentrations of total phenolics and ginsenosides (including Rd and Re), has potential as a functional food.

Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10068-020-00735-5) contains supplementary material, which is available to authorized users. & Ki Won Lee [email protected] 1

Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea

2

Advanced Institutes of Convergence Technology, Seoul National University, Suwon 16229, Republic of Korea

3

Department of Food Science and Technology, Korea National University of Transportation, Jeungpyeong 27909, Republic of Korea

Keywords Panax ginseng CA Meyer  Hydroponic cultivation  Ginseng  Ginsenosides  Phenolic compounds

Introduction Panax ginseng CA Meyer (Korean ginseng) is a perennial plant of the family Araliaceae and has been used as an ingredient in traditional herbal medicines for over 2,000 years, particularly in Asia. Korean ginseng is currently distributed to 35 countries worldwide (Jung et al., 2002). Ginseng exerts various bioactive effects, including antioxidant and antitumor activities. Prior studies have focused on saponins (ginsenosides), as the primary active ingredients in ginseng, because saponins exert several beneficial effects (Christensen, 2009). The total ginsenoside content is an important determinant of the potency of ginseng. To date, more than 100 ginsenosides have been identified in P. ginseng (Shin et al., 2015). most of which belong to one of two major functional types: protopanaxadiol (PPD) and protopanaxatriol (PPT) types. As these two types of ginsenoside exert different physiological effects (Chen et al., 2016), the PPD/PPT ratio is calculated to determine the bioactiv