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| Relationships between saponin component contents in Panax notoginseng taproot and ecological factors |
| Received:December 31, 2021 |
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| KeyWord:Panax notoginseng;taproot;saponin component contents;ecological factor |
| Author Name | Affiliation | E-mail | | RAN Yuyan | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | LIANG Shewang | College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming 650201, China | | | WENG Jing | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | SHI Jing | Graduate Department, Yunnan Agricultural University, Kunming 650201, China | | | HE Zhongjun | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | hezhongjun@hotmail.com |
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| Abstract: |
| This study explored the effect of ecological factors on saponin components in the taproot of Panax notoginseng and determined the primary factors that affect saponin components in the taproot. The quantitative relationships between saponin component contents in the taproot of P. notoginseng and ecological factors were studied using comprehensive research methods of correlation, stepwise regression, path analysis, and decision analysis. The content of notoginsenoside R1 in the taproot of P. notoginseng was significantly negatively correlated with soil pH, latitude, and mean temperature in July. Soil pH and latitude were the major determining factors, whereas mean temperature in July was the key limiting factor. The content of ginsenoside Rg1 in the taproot of P. notoginseng was mainly restricted by the minimum temperature in January, maximum temperature in July, and latitude, among which the minimum temperature in January had the greatest effect. The content of ginsenoside Rb1 in the taproot of P. notoginseng was mainly affected by atmospheric humidity and taproot Ca content, both of which were decisive factors. The total saponin content in the taproot of P. notoginseng was mainly affected by minimum temperature in January, latitude, and taproot Ca and Cu content. The contents of total saponins and saponin components in the taproot of P. notoginseng exhibited regional characteristics. The key to obtaining high saponin contents in the taproot of P. notoginseng is to increase the low temperature in January, atmospheric humidity, and soil Ca content and to decrease the latitude and mean temperature in July within a certain range. |
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