数字农科院2.0

Structural Characterization And Antioxidant Activity Of A New Polysaccharide From Bletilla Striata Fibrous Roots

文献类型： 外文期刊

作者： Chen, ZY; Zhao, Y; Zhang, MK; Yang, XF; Yue, PX; Tang, DK; Wei, XL

作者机构：

关键词： Bletilla Striata Polysaccharide; Fibrous Root; Antioxidant Activity; Galactomannan

期刊名称： CARBOHYDRATE POLYMERS

ISSN： 0144-8617

年卷期： 2020 年 227 卷

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： A new polysaccharide (pFSP) was first isolated from the originally discarded fibrous roots part of Chinese traditional herb, Bletilla striata. pFSP was composed of D-glucose, D-galactose and D-mannose in a molar ratio of 1: 2.03: 3.45 with molecular weight of 9.1 x 10(4)Da. It could effectively scavenge DPPH and superoxide radicals with inhibition rate of 64.47% and 72.27% at 5.0 mg/ml, higher than that of polysaccharide from Bletilla striata tuber. Structural investigations of the periodate oxidation studies and Smith-degradation as well as the FT-IR spectroscopy were performed, and combined with 1D and 2D NMR spectroscopy, the repeating unit of pFSP contained (1 -> 4)-linked-alpha-D-Glcp, (1 -> 4) linked-beta -D Manp and (1 -> 3,6) linked-beta-D-Manp units, together with the branches of (1 -> 6)-linked-beta-D-Galp and terminated with (1 ->) linked-beta-D-Manp residue.

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