STUDIES ON TWO NEW FUROSTANOL GLYCOSIDES FROM ALLIUM MACROSTEMON BUNGE

Two new furostanol saponins,named macrostemonoside E(1)and F(2),were isolated from the bulbs of Allium macrostemon Bunge (Liliaceae),their structures were established oy spectroscopic analysis and chemical evidences.Both possessed strong inhibitory activity on human platelet aggregation.

TWO NEW STEROIDAI, SAPDNINS FROM THE BULBS OF ALLIUM MACROSTEMON BUNGE

Two new steroidal saponins, named macrostemonoside A and D. were isolated from the bhlbus of Allium macrostemon Bunge (Liliaceae), and their strurtures were established by spectroscopic analysis and chemical evidences.

基于DNA序列探讨中国南方地区薤白亲缘关系及地理分布格局

薤白为重要的药食同源植物,为探讨其不同产地亲缘关系,本研究利用nrDNA ITS序列,cpDNA rps16和trn L-F序列对中国南方地区不同产地的22份薤白进行系统发育分析。结果显示,南方地区不同产区薤白ITS+rps16+trn L-F联合序列平均长度为1984 bp,G+C平均含量为38.14%,含有471个变异位点。基于ITS+rps16+trn L-F联合序列构建最大简约法(maximum parsimony,MP)和贝叶斯(bayesian inference,BI)系统发育树均可将薤白与其他葱属植物区分开,表明薤白为单系种,且总体可划分为位于南方地区西部的A组和东部的B组。研究表明,亲缘关系较近的居群,地理位置也相近,这说明ITS+rps16+trn L-F联合序列可用于薤白及其近缘种的种间鉴别及亲缘关系研究。此外,本研究所构建系统发育树结果表明,不宜将长梗韭(Allium neriniflorum)作为中药薤白(Allii macrostemonis Bulbus)的生药原料。本研究结果可为薤白资源的开发、保护、利用及育种提供理论依据,对正确选用中药薤白的基源植物具有指导意义。