Isolation and Structural Characterization of a Second Polysaccharide from Bulbs of Lanzhou Lily
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In this study, a second water-soluble polysaccharide (designated as LDP-2) was isolated from the bulbs of Lanzhou Lily (Lilium davidii var. unicolor). Based on monosaccharide composition and methylation analysis, its structural features were investigated using a variety of characterizations, such as size-exclusion chromatography combined with laser light scattering (SEC-LLS), gas chromatography-mass spectroscopy (GC-MS), infrared (IR) spectroscopy, and nuclear magnetic resonance (NMR) spectroscopy. The results demonstrate that LDP-2 is a homogeneous heteropolysaccharide (molecular weight 6.2 × 104 Da), which includes four kinds of monosaccharides (Lyx, Man, Glc, and Gal in an approximate weight ratio of 6.74: 6.28: 76.50: 10.48). Furthermore, its morphology, thermal behavior, and preliminary hypoglycemic activities were also investigated.
KeywordsPolysaccharide Lanzhou Lily Purification Hypoglycemic activity
We thank the National Natural Science Foundation of China (21561019) and Young Teachers Research Capacity Promotion Program of Northwest Normal University (NWNU-LKQN-16-19) as well as the Foundation of A Hundred Youth Talents Training Program of Lanzhou Jiaotong University.
Compliance with Ethical Standards
Conflicts of Interest
The authors declare that they have no conflict of interest.
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