The Functional Components of By-Product Resources from the Aerial Parts of Polygonatum cyrtonema Hua

Jiabei Xia, Xingyu Mei, Huan Cheng, Shiguo Chen, Xingqian Ye and Jianle Chen ()
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Jiabei Xia: Ningbo Innovation Center, Zhejiang University, Ningbo 315100, China
Xingyu Mei: Ningbo Innovation Center, Zhejiang University, Ningbo 315100, China
Huan Cheng: Ningbo Innovation Center, Zhejiang University, Ningbo 315100, China
Shiguo Chen: Ningbo Innovation Center, Zhejiang University, Ningbo 315100, China
Xingqian Ye: Ningbo Innovation Center, Zhejiang University, Ningbo 315100, China
Jianle Chen: Ningbo Innovation Center, Zhejiang University, Ningbo 315100, China

Agriculture, 2023, vol. 13, issue 9, 1-12

Abstract: The rhizome of Polygonatum , which has been consumed in China for nearly 2000 years, is rich in oligosaccharides, polysaccharides, saponins, and alkaloids and has various effects such as lowering blood sugar and anti-aging. Its aerial parts are often discarded as by-products and have been rarely studied; moreover, the nutritional composition and carbohydrate composition of these parts are not clear. In this study, the nutritional composition, amino acid evaluation, and the total phenolics content of the leaves, stems, fruits, and flowers of Polygonatum cyrtonema Hua were analyzed, and the composition and content of carbohydrates were determined by high-performance anion-exchange chromatography with pulsed amperometric detection (HPAEC–PAD). The results suggested that the leaves and flowers of Polygonatum cyrtonema Hua (PC) contained 1.12–1.37% phenolic substances. The proteins of the aerial parts had high nutritional values, and the total amino acid content of the leaves and flowers, with the total leaf amino acids amounting to 11.77%, were followed by the flowers at 11.65%. The sugars in the flowers were mainly free monosaccharides at 10.38%, and the fruits were dominated by 9.44% fructo-oligosaccharides. This study provided new evidence for the utilization of the aerial parts of Polygonatum.

Keywords: Polygonatum cyrtonema Hua; nutrient composition; amino acid evaluation; composition of carbohydrate (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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