Acta Agriculturae Zhejiangensis ›› 2024, Vol. 36 ›› Issue (5): 1144-1152.DOI: 10.3969/j.issn.1004-1524.20230718

• Food Science • Previous Articles     Next Articles

Study on the extraction processing and antioxidant activities of saponins from Polygonatum cyrtonema Hua roots

LIU Chenxing(), CAO Yan, XIA Qile*()   

  1. Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture and Rural Affairs, Key Laboratory of Postharvest Preservation and Processing of Vegetables (Co-construction by Ministry and Province), Ministry of Agriculture and Rural Affairs, Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Key Laboratory of Postharvest Preservation and Processing of Fruits and Vegetables, Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
  • Received:2023-06-05 Online:2024-05-25 Published:2024-05-29

Abstract:

The roots of Polygonatum cyrtonema Hua have long been considered as by-product with low value, and few relevant studies have been reported. This study aims to clarify the desirable extraction process of saponins from the roots of Polygonatum cyrtonema Hua and evaluate the antioxidant activities of the obtained saponins. Response surface analysis presented that the optimum extraction method was 72% ethanol, 1:25 g·mL-1, and 41 min. The relationship between Y (extraction rate) and factor A (ethanol volume fraction), factor B (solid-liquid ratio), factor C (extraction time) was presented as Y=5.58+0.516 2A+0.078 8B+0.05C-0.02AB-0.007 5AC-0.002 5BC-1.38A2-0.439 5B2-0.257C2. The peak of saponins extraction was 5.62%, which is very close to the estimated peak (5.628%). Antioxidant test exhibited that saponins have good antioxidant activities with 0.87 mg·mL-1 IC50 DPPH and 0.68 mg·mL-1 IC50 ABTS. Overall, the saponins in the roots of Polygonatum cyrtonema Hua have considerable potential in use. This study can provide an important reference basis for the comprehensive utilization of Polygonatum cyrtonema Hua, as well as other by-products.

Key words: Polygonatum cyrtonema Hua, saponins, extraction rate, antioxidant activity

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