Research Progress in Source,Biosynthesis and Function of Microbial Exopolysaccharides
Exopolysaccharides are multifunctional glycan compounds synthesized by microorganisms.In recent years,it has been found that exopolysaccharides have the functions of adsorption,hydrophilicity,cohesiveness and immune activity,which have attracted extensive attention in the field of multidisciplinary researches.At present,the production and purification process of exopoly-saccharides has several problems,such as high cost and low yield,which limit the large-scale production and commercial applica-tion.In this review,the microbial sources,biological characteristics and physiological functions of exopolysaccharides were system-atically introduced,the biosynthetic mechanisms of several exopolysaccharides with industrial application potentials were emphati-cally summarized,and the latest application directions of exopolysaccharides were listed.Moreover,the biosynthetic mechanisms,the large-scale production,and multi-field application of exopolysaccharides were prospected.Therefore,this review was expected to pro-vide a reference for the further development and utilization,in-depth study of the function and activity mechanism,and the optimization of fermentation production process of microbial exopolysaccharides,and the extensive application in multiple disciplines and fields.
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