六种酸模属药用植物茎的显微特征研究

Microscopic Structure of Stem from 6 Rumex Species

目的:研究酸模属植物茎的组织学特征,为显微鉴别提供依据。方法:对酸模属6种药用植物羊蹄Rumex japonicus Houtt.、酸模Rumex acetosa L.、皱叶酸模Rumex crispus L.、网果酸模Rumex chalepensis Mill.、齿果酸模Rumex dentatus L.和长刺酸模Rumex trisetifer Stokes的茎的横切面进行了制作和观察。结果:首次在羊蹄和网果酸模茎中观察到异常构造——内生维管束(internal bundle)。结论:6种酸模属植物茎横切面的显微特征虽然较为相似,但或多或少具有一定的区别,可为6种植物的鉴别提供依据;根据茎中内生维管束的有无及生长年限,初步推测了其演化关系。

Objective- To study the anatomical structures of the stems of Rumex species. Methods ： The transverse sections of the stems of 6 Rumex species, i. e. , R. japonicus Houtt. , R. acetosa L. , R. crisp- us L. , R. chalepensis Mill. , R. dentatus L. and R. trisetifer Stokes have been prepared and observed. Results： The internal bundle, an anormal structure found only in genus Rumex up to now, was observed in the stem of R, japonicus and R. chalepensis for the first time. Conclusion： Although similar in the an- atomical structures, the stem cross sections of 6 Rumex species can be identified by their key differences. Meanwhile, the evolutional relationship of 6 species was deduced on the basis of internal bundle and growing years.