不同染色体数目鱼腥草挥发油成分的薄层色谱分析

目的研究鱼腥草染色体数目与挥发油成分的关系，比较鱼腥草鲜草与干草及其不同部位的挥发油成分差异。方法对不同染色体数目的鱼腥草鲜草地上和地下及其阴干地上部分挥发油成分进行了薄层色谱分析。结果按挥发油TLC图谱斑点数目和清晰度不同，20份鲜草材料地上部分大致呈现5种类型，地下部分挥发油大致呈现3种类型，19份干草材料大致呈现4种类型。结论鲜草地上和地下部分挥发油、鲜草与干草挥发油在化学成分上均有较大差异，材料间挥发油成分差异鲜草大于干草，地上大于地下，并且鲜草挥发油有染色体数目增加同时斑点数增多的趋势；峨眉蕺菜同蕺菜在挥发油成分上并无显著差别。

TLC analysis on essential oil in Houttuynia cordata with different chromosome numbers

Object To study the relationship between the essential oil constituents and the chromosome numbers of Houttuynia cordata and compare the difference of the essential oil constituents from the fresh and the dried ones, aerial and underground parts of the fresh plant. Methods The essential oil constituents of H. cordata with different chromosome numbers from the aerial and underground parts of the fresh, and the aerial parts dried in shade as well were analyzed by TLC. Results According to the difference of the spot number and definition of the essential oil TLC pattern, the essential oil constituents in the aerial parts of 20 fresh plants were classified into five types, those in their underground parts into three types, and those in 19 dried plants into four types. Conclusion There is obvious difference in the essential oil constituents between the fresh aerial and underground parts, and between the fresh and dried plants. The difference among the fresh plants is more significant than that of the dried ones. And the difference among the aerial parts of the fresh plants is more significant than that of the underground parts. There is a tendency that the spot numbers increase with the chromosome numbers. The difference of essential oil constituents in H. emeiensis and H. cordata is insignificant.