地黄属资源植物中梓醇的分布及积累动态

采用液质联用（HPLC-UV-MS）法对同地栽培的地黄属各物种中梓醇的分布及积累规律进行了检测.研究发现地黄属6种植物都含有丰富的梓醇成分，茄叶地黄、高地黄和裂叶地黄梓醇含量较高，接近于地黄中梓醇的含量.并发现地黄属植物块根中梓醇含量高峰在入冬前的成年期，而地上部分梓醇含量高峰在越冬后的开花结实期.在各物种内，地上部分梓醇含量通常高于地下部分，粗壮和木质化程度低的块根中高于纤细和木质化程度高的块根中.探讨了地黄属资源植物的应用前景和梓醇分布和积累规律的形成原因.

Distribution and Accumulation Trends of Catalpol in Resource Species of Rehmannia

High-performance liquid chromatography-UV-mass spectrometry (HPLC-UV-MS) was used to check the distribution and accumulation trends of catalpol in Rehmannia species cul- tivated in the same place.It reveals for the first time that all the 6 species of Rehmannia contain plenty of catalpol,with R.solanifolia,R.clara and R.piasezkii among the most,close to that of R.glutinosa.And,in root tubers of all the Rehrnannia species,mature plants before winter bear most catalpol,compared to that of young seedlings and that of plants in blossom.On the contrary,in stems and leaves,plants in blossom contain most catalpol.Within each species, stems and leaves usually have more catalpol than that of root tubers,enlarged and low lignified root tubers accumulate more catalpol than that of thin and high lignified ones.The mechanism of distribution and accumulation trends of catalpot and expected application of the resource species have been discussed.