草珊瑚植物叶、茎显微结构与黄酮组织化学定位研究

目的:以药用植物草珊瑚叶、茎为材料,研究黄酮类物质在其中的分布。方法:在观察草珊瑚植物叶、茎显微结构的基础上,用NaOH显色和醋酸镁甲醇液显色的组织化学方法进行黄酮类化合物定位。结果:黄酮类化合物在叶中主要分布在表皮和位于上下表皮内的厚角组织、类栅栏组织、维管束、分泌细胞中;在茎中主要分布在表皮、厚角组织、分泌细胞、韧皮部。结论:黄酮类化合物的NaOH显色法,相对其他以醇类为显色剂溶剂的荧光显色法是较为简便可行、定性迅速的组织化学鉴定方法。叶中黄酮含量高于茎部。因此,若以总黄酮为草珊瑚有效成分,可以只采收叶,保留其根部和茎部,以达到可持续性地有效利用中药资源的目的。

Microstructure and histochemical localization of flavonoids in leaves and stem in Sarcandra glabra

Microscopic and histochemical methods were used to investigate flavonoids localization in the leaf and the stem of the Sarcandra glabra. The results indicated that flavonoids distributed mainly in epidermis, collenchyma, vascular bundles,secretory cells and palisade tissue of leaf. In the stem, they distributed mainly in epidermis, collenchyma, phloem and secretory cells. Histochemical localization of flavonoids using 5% solution of NaOH is convenient,rapid and reliable. The content of flavonoids in the leaf was higher those than in the stem. For sustainable utilization of the resources we suggested that only the leaves could be harvested.