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KMID : 1098420220300020099
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Korean Journal of Medicinal Crop Science
2022 Volume.30 No. 2 p.99 ~ p.107
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Influence of Freezing Damage during Sprouting Periods on Root Growth Characteristics and Saponin Contents in Panax Ginseng C. A. Meyer
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Suh Su-Jeoung
Yu Jin
Kim Dong-Hwi
Jang In-Bae
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Abstract
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Background: Abrupt temperature decline to freezing temperature in late spring results in severe damage to ginseng. Here we artificially applied freezing stress on ginseng and investigated the damage effects on its growth and saponin contents.
Methods and Results: Freezing stress was applied on 2-year-old ginseng in the pots or 3-year-old ginseng in the field. After 1 month of freezing treatment, the damage degree of the shoot was evaluated as ‘dead’, ‘damage > 50%’, ‘damage < 50%’, and ‘healthy’. Roots were harvested after 4 months, and the growth properties were examined according to the shoot damage degree. In both experiments, there was a clear difference in root length, root diameter, and root weight in the order of shoot damage degree. The correlation coefficient between plant height and root weight was 0.979, and the regression model was obtained as Y = 0.5211 × e0.0806X, where Y is root weight and X is shoot length (R2 = 0.9947). Total saponin content was the highest in ‘healthy’.
Conclusions: Freezing stress in the early stage of ginseng had significant effect on root growth according to the remaining leaf area. We assume that these results will help evaluating the damage caused by freezing stress.
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KEYWORD
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Panax ginseng C. A. Meyer, Abnormal Climate Change, Damage Degree, Freezing Damage, Late Spring, Saponin
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