Objective: To detect the content of polysaccharides in the root of Salvia miltiorrhiza collected from different provenances, and to discover the dynamic change rules of polysaccharides at various growing stages.
Methods: Polysaccharides were extracted by hot water extraction method, and the content of polysaccharides was measured by phenol-sulfuric acid.
Results: The content of polysaccharides changed at different growing stages. The variation trend of different provenances were different, and the polysaccharides content of different provenances were different at the same growing stage. At different growing periods, the distribution of polysaccharides in the xylem and cortex of roots were different. The content of polysacchrides in the root was minimum at maturity. At harvest time, the content of polysaccharides in the root was the highest in Beijing, the second was in Jiangsu, and the lowest was in Henan.
Conclusion: The experiment provides theoretical basis for the selection of Salvia miltiorrhiza with the highest content of polysaccharides and the development and utilization of the polysaccharides.