Accumulative Trends of Polysaccharides and Saponins from Pseudostellaria heterophylla in Different Seasons

Objective To determine the optimum collective periods by analysis the content of polysaccharides and saponins of the plants collected in different times for Pseudostellaria heterophylla(Miq.)Pax ex Pax et Hoffm.from Guizhou Shibing and Leishan GAP bases.Methods The contents of polysaccharides and saponins were measured by the sulphuric acid-phenol colorimetric method and the vanillin-ice acetic acid colorimetric method. Results From Shibing GAP base,the highest levels of polysaccharides in the plant collected times that are in Mar(30.61%),Apr(32.82%),Jul(26.3%) and Sep(42.32%) respectively;and Leishan GAP base that are in Apr(42.48%),Jul(40.6%) and Sep(37.68%).From Shibing GAP base,the highest levels of saponins in the plant collected that are in Mar(1.16%),Apr(2.04%) and Jun(1.7%) respectively;and Leishan GAP base that are in Mar(2.04%) and Sep(0.78%).Conclusions The contents of polysaccharides and saponins of Pseudostellaria heterophylla are changeable collected in different seasons,it is reasonable that is collected during July to Sept.