Polygonatum Mill. (Asparagaceae) is an edible crop with great potential for development in China. This study focused on the analysis of protein components from Polygonatum kingianum Coll. et Hemsl (DHJ), P. cyrtonema Hua (DHHJ), and P. sibiricum Red (HJ). DHJ exhibited the lowest protein content (83.2 mg/g), the highest essential AA rate (23.6 %), the highest degree of protein hydrolysis (13.5 %), and the highest PDCAAS (0.57). DHHJ had the highest protein contents (189.8 mg/g), the lowest rate of essential AA (21.6 %), the lowest degree of protein hydrolysis (10.8 %), and the lowest PDCAAS (0.42). The first limiting AA was found to be Lys for DHHJ and Lys/Leu for DHJ and HJ. 96 carbohydrate, 61 amino acid, and 83 energy metabolism-related differential proteins were identified. Protein A0A5P1F9I9 and Q5EER7 were highly related to the digestive and nutritional properties. This study could provide an essential reference for better utilizing the Polygonatum protein component.
Polygonatum a widely recognized medicinal and edible plant, exhibits several confirmed biological activities and holds significant market potential. Numerous studies have identified polysaccharides are one of the primary bioactive components in the rhizomes of Polygonatum . Our previous research identified a notable presence of fructo-oligosaccharides in the rhizomes of Polygonatum sibiricum , highlighting its largely overlooked potential as a natural source of bioactive compounds. Therefore, a more systematic and comprehensive analysis of water-soluble carbohydrates across different species and plant parts of Polygonatum is essential. The aim of this study was to investigate the carbohydrate composition in four different Polygonatum species, focusing on the rhizomes, roots, leaves, stems, and fruits. In particular, we utilized a self-established method for the determination of fructo-oligosaccharides. The results indicated the presence of small amounts of mono/disaccharides and polysaccharides, as well as a considerable quantity of fructo-oligosaccharides in rhizome, root, fruit of Polygonatum . The low-molecular-weight glycans was the predominant carbohydrate in the rhizomes of Polygonatum Mill. spp., comprising over 80% of the total soluble carbohydrates, with polysaccharides contributing approximately 11%, and mono/disaccharides less than 10%. Our study offers valuable insights and a meaningful basis for the excavation of the functional carbohydrate resources of the Polygonatum Mill.
危险品化学品经营许可证（带存储）