Comparative Analysis of Polysaccharides from Two Ecological Types of Leymus chinensis  

作　　者：LI Jing-jing BI Hong-tao YAN Jl-hong SUN Fang FAN Sha-sha CAO Gang ZHOU Yi-fa CHEN Xi-guang 

机构地区：[1]College of Marine Life Science, Ocean University of China, Qingdao 266003, P. R. China [2]Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, P. R. China [3]Bee Research Institute, Chinese Academy of Agricultural Sciences, Beo'ing 100093, P. R. China [4]School of Life Sciences, Northeast Normal University, Changchun 130024, P. R. China

出　　处：《Chemical Research in Chinese Universities》2012年第4期677-681,共5页高等学校化学研究（英文版）

基　　金：Supported by the Natural Science Foundation of Jilin Province,China(No.20110242);the Natural Science Foundation of Qinghai Province,China(Nos.2011-Z-924Q,2011-ZR-242)

摘　　要：Leymus chinensis（Trin.） Tzvel.,widely distributed at eastern Eurasian steppe and divided into gray-green type and yellow-green type,has different stress resistance to environment.In the present study,the water-soluble polysaccharides from two ecotypes of L.chinensis were analyzed in detail,and the differences between polysaccharides from the two ecotypes of L.chinensis in the yield,monosaccharide composition,molecular weight and structure were clarified.The polysaccharides of L.chinensis were composed of both neutral and acidic polysaccharides.The neutral polysaccharides contained mannose,glucose,galactose,xylose and arabinose,and mainly consisted of β-1,4-Glcp,α-1,3-Galp and α-1,2-Xylp residues.The acidic polysaccharides contained mannose,rhamnose,glucuronic acid,galacturonic acid,glucose,galactose,xylose and arabinose.However,the yields,monosaccharides contents and the molecular weights of the polysaccharides from the two ecotypes of L.chinensis were different.Moreover,the resistance type（gray-green type） of L.chinensis contained a number of α-1,3-Manp and reducing end of β-Glcp residues,and much more O-methyl groups than normal type（yellow-green type） of L.chinensis.The differences of the polysaccharides of the two ecotypes of L.chinensis might be due to the long-term environmental adaptability of plant,and the differences of the polysaccharides might influence the stress resistance of L.chinensis.Leymus chinensis（Trin.） Tzvel.,widely distributed at eastern Eurasian steppe and divided into gray-green type and yellow-green type,has different stress resistance to environment.In the present study,the water-soluble polysaccharides from two ecotypes of L.chinensis were analyzed in detail,and the differences between polysaccharides from the two ecotypes of L.chinensis in the yield,monosaccharide composition,molecular weight and structure were clarified.The polysaccharides of L.chinensis were composed of both neutral and acidic polysaccharides.The neutral polysaccharides contained mannose,glucose,galactose,xylose and arabinose,and mainly consisted of β-1,4-Glcp,α-1,3-Galp and α-1,2-Xylp residues.The acidic polysaccharides contained mannose,rhamnose,glucuronic acid,galacturonic acid,glucose,galactose,xylose and arabinose.However,the yields,monosaccharides contents and the molecular weights of the polysaccharides from the two ecotypes of L.chinensis were different.Moreover,the resistance type（gray-green type） of L.chinensis contained a number of α-1,3-Manp and reducing end of β-Glcp residues,and much more O-methyl groups than normal type（yellow-green type） of L.chinensis.The differences of the polysaccharides of the two ecotypes of L.chinensis might be due to the long-term environmental adaptability of plant,and the differences of the polysaccharides might influence the stress resistance of L.chinensis.

关 键 词：Leymus chinensis POLYSACCHARIDE FRACTIONATION 

分 类 号：TS218[轻工技术与工程—粮食、油脂及植物蛋白工程] Q949.714.2[轻工技术与工程—食品科学与工程]