化学
多糖
木糖
硒
鼠李糖
阿拉伯糖
抗氧化剂
色谱法
单糖
半乳糖
葡萄糖醛酸
生物化学
有机化学
发酵
作者
Anni Xiang,Wenting Li,Yuning Zhao,Hongmei Ju,Shi Xu,Shiyu Zhao,Tianli Yue,Yahong Yuan
标识
DOI:10.1016/j.carres.2021.108498
摘要
Selenium polysaccharides have antioxidant, anti-tumor and other activities. Tea selenium polysaccharides and Lentinan selenium polysaccharides, etc. have been studied. Pennycress is a super-rich selenium plant and there are few studies about pennycress selenium-containing polysaccharides. In this study, the following researches were carried out on pennycress selenium polysaccharides: Selenium-containing polysaccharides were extracted from the leaves of pennycress (Thlaspi arvense L.) using an efficient subcritical water extraction (SWE) process. After purification, two fractions (Se-PPS1 and Se-PPS3) were obtained and subjected to structural identification. The results showed that the molecular weights of Se-PPS1 and Se-PPS3 were 4.2 × 104 Da and 4.5 × 104 Da, respectively. Se-PPS1 is mainly comprised of glucose, galactose, and xylose. Se-PPS3 consists of glucuronic acid, rhamnose, galacturonic acid, glucose, galactose, xylose, and arabinose. Fourier transform infrared spectroscopy (FT-IR) analysis showed that the two fractions had absorption spectra typical of selenium esters and spectral characteristics of polysaccharides. The glycosidic linkages were determined by Gas chromatography-mass spectrometry (GC-MS) and Nuclear magnetic resonance (NMR). The two fractions have (1 → 6)-β-D- Galp and T-α-D- Glcp configurations. Moreover, in vitro antioxidant activity assays showed that Se-PPS1 and Se-PPS3 exhibited effective radical-scavenging abilities, suggesting they have potential applications as natural antioxidants in food and medicine.
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