Dynamic Accumulations and Contents of Root Polysaccharides of Different Officinal Astragalus Varieties Effect of companion fungus on hyphal growth and polysaccharide content of Polyporus umbellatus Comparison of Polysaccharide Content in Different Cultivars of Momordica Charantia L.and in Different Tissues and Development Stages Effects of formula fertilization to yield and content on polysaccharide of Isatis indigotica Comparison of Polysaccharide Content in Different Cultivars of Momordica Charantia L.and in Different Tissues and Development Stages