5种地榆属植物花粉形态的扫描电镜鉴别

Pollen Morphology Identification of Five Species of Medicinal Sanguisorba with Electron Microscope

目的:为补充地榆药材基源鉴定和纠正宽蕊地榆Sanguisorba applanata 的种名误定。方法:用扫描电镜对5 种地榆属植物,地榆S.officinalis,长叶地榆S.officinalis var.longifolia ,宽蕊地榆S.applanata,柔毛宽蕊地榆S.applanata var.villosa 和大白花地榆S.sitchinese 的花粉进行了形态鉴别。结果:发现这5 种植物的花粉形态均为近球形～长球形;6 孔沟;表面均具小穴及小颗粒突起的雕纹;种与变种的花粉形态之间较为接近;而种间差异主要在形态大小、孔膜明显与否及有无不规则块状突起雕纹等方面。

Objective:To approach a new evidence for identifying various species of Rosaceae Sanguisorba ,especially for distinguishing S.applanata from S.sitchinese . Method:The pollens of five species S.officinalis,S.officinalis var. longifolia,S.applanata,S.applanata var. villosa and S.sitchinese were morphologically identified with electron microscope.Results:The pollens are prolate or perprolate,having six colporates and featuring sculptures of small caverns and small granules combined. The species are closed to each other in pollen morphology,bur display differences in the diameter of pollens,clarity of pore membrane and presence or absence of irregular verrucous sculptures. Conclusion:This paper provides a new evidence for identifing the Sanguisorba.