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Structural and functional characterization of exopolysaccharide from Leuconostoc citreum BH10 discovered in birch sap

文献类型： 外文期刊

作者： Ge, Zhiwen 1 ; Wang, Dan 1 ; Zhao, Wenting 1 ; Wang, Pan 1 ; Dai, Yiqiang 2 ; Dong, Mingsheng 2 ; Wang, Junjuan 1 ; Zhao, Yuanyuan 1 ; Zhao, Xiaoyan 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Beijing Key Lab Fruits & Vegetables Preservat & Pr, Inst Agrifood Proc & Nutr, Key Lab Vegetable Postharvest Proc,Minist Agr & Ru, Beijing 100097, Peoples R China

2.Nanjing Agr Univ, Coll Food Sci & Technol, Nanjing 210095, Jiangsu, Peoples R China

关键词： Exopolysaccharides; Characterization; Leuconostoc citreum BH10

期刊名称：CARBOHYDRATE RESEARCH （ 影响因子：3.1； 五年影响因子：2.5 ）

ISSN： 0008-6215

年卷期： 2024 年 535 卷

页码：

收录情况： SCI

摘要： In this study, Leuconostoc citreum BH10, an endophytic strain, was isolated from aseptically collected xylem sap of birch for the first time, and its exopolysaccharide (LCEPS) production was up to 46.31 g/L in glucan producing medium. The produced LCEPS was purified to obtain two water-soluble fractions, named as LCEPS-1 and LCEPS2, respectively. The major fraction LCEPS-1 was characterized to be comprised of glucose with average molecular weight of 6.34 x 106 Da. The structure of LCEPS-1 was investigated by spectroscopy analysis, which revealed that LCEPS-1 was identified with containing 90.45 % alpha-(1,6) linkages in the main chains and 9.55 % alpha-(1,3) branch linkages. The scanning electron microscope results demonstrated that the dried LCEPS-1 appeared porous surface overlaid with an irregular glittering. The water solubility index (WSI) and water holding capacity (WHC) of LCEPS-1 were 88.02 +/- 1.69 % and 241.43 +/- 6.38 %, respectively. Besides, it exhibited high thermal stability as well as fine antioxidant activities. Taken together, the results indicated that LCEPS-1 could have good potentiality to be applied in fields of foods, cosmetics, nutraceuticals and pharmaceutical industries as the natural agent.

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