3种苜蓿不同部位皂苷含量的测定研究

目的]研究3种苜蓿不同部位中皂苷含量的测定。方法]采用比色法测定了江苏地区苜蓿属3种植物紫花苜蓿（包括5种栽培品种）、天蓝苜蓿和南苜蓿不同部位的总皂苷含量。结果]紫花苜蓿根中皂苷含量（1.39%）明显高于其他2种苜蓿根中皂苷含量;天蓝苜蓿和南苜蓿茎中皂苷含量差异不明显（RSD=2.4%）,略低于紫花苜蓿茎中皂苷含量（0.583%）;天蓝苜蓿叶中皂苷含量最低（0.623%）。综合3种不同部位的皂苷含量,根中皂苷的平均含量达到1.335%,明显大于茎（0.596%）和叶（0.655%）中皂苷含量。结论]该研究为进一步开发苜蓿属植物资源提供了一定的理论依据。

Determination of Saponin Content in Different Parts of 3 Kinds of Alfalfa

Objective]The aim was to studt the determination of saponin content in different parts of 3 kinds of alfalfa.Method]Contents of total saponin in different parts of Medicago sativa L.(including 5 cultivars) ,Medicago lupulina L.and Medicago polymorpha L.from Jiangsu Province were determined by colorimetric method.Result] Saponin content (1.39% ) in the root of Medicago sativa L.was obviously higher than those in Medicago lupulina L.and Medicago polymorpha L.; There was no obvious difference between saponin contents in the stems of Medicago lupulina L.and Medicago polymorpha L.(RSD=2.4% ) ,which were slightly lower than that of Medicago sativa L.(0.583%) ; The leaf of Medicago lupulina L.had the lowest saponin content (0.623%) .Combining the saponin contents in the 3 different parts,it was found that average content of saponin in root reached 1.335% ,which was obviously more than those in stem (0.596% ) and leaf (0.655%) .Conclusion]The research provides a certain theoretical basis for the further exploitation of Medicago Linn.resources.