丝瓜根化学成分研究(Ⅰ)

目的 研究丝瓜根的化学成分。方法 丝瓜根的水煮液经大孔树脂柱层析 ,6 0 %乙醇洗脱得到粗提物 ,用硅胶柱层析 ,以氯仿 ;氯仿 -丙酮 ;氯仿 -甲醇不同比例洗脱 ,分别得到 11种成分。结果 经理化、TL C、光谱分析及标准品比较 ,确定为三萜皂苷 ,其中鉴定了 4种成分的结构 ,它们分别是 :齐墩果酸 (L- cy- 1) ;2 1β-羟基齐墩果酸 (L-cy- 2 ) ;3- O- β- D-葡萄吡喃糖 - 2 1β-羟基常春藤皂苷 (L- cy- 3) ;2 α-羟基常春藤皂苷元 - 3- O- β- D-葡萄吡喃糖苷 (L- cy-6 )。结论 以上 4个化合物均为首次从该植物根中分得。

Study on the Activity of Herbal Extract to Kill Root-knot Nematode of Cucumber Seedlings Stage

Present mature plants hydroponic technology was used,combined with some excellent characteristics,such as growth conditions was easy to control and process of root growth was easy to continuously observe,the nematicidal activity of 5 kinds of Chinese herbs extracts and the compound solution of Avermectin,with strong contact toxicity effect indoor,was systematically studied and investigated the affection on the root-knot nematode parasitized on the cucumber seeding stage. It is found that under the premise of no influence on root growth of cucumber,extracts from Picrorhiza scrophulariiflora and Punica granatum showed strong prevention and nematicidal activity,and had the similar efficacy of Avermectin; while the extracts from Cibotium barometz,Aucklandia lappa Decne and Fructus cnidii showed low nematicidal activity and various degrees inhibition effect on plant growth.