中药溪黄草及其药用近缘种的花粉形态

Pollen Morphology of Chinese Medicine Xihuangcao and Its Related Species

用光学显微镜和扫描电镜对中药溪黄草４种基源植物的花粉形态进行了观察和比较研究．结果表明：光学显微镜下该四种植物的花粉形态相似，赤道面观长球形至扁球形，极面观６裂圆形，具６沟，外壁具粗网状纹饰，而扫描电镜下４种花粉在外壁纹饰、萌发沟等方面存在着明显差异，这些差异可为近缘种的鉴定以及该类生药的鉴定提供依据．

Pollen morphology of four original plants of Chinese Medicine Xihuangcao was examined by light microscope (LM) and scanning electron microscope (SEM ) for the first time. Pollen grains are spheroidal or subspheroidal,prolate or subprolate in shape and 6-lobed-circular in polar view, 6-loppate; The ornamentation of exine is coarsely reticulate. Under SEM, apparent differences can be observed about ornamentation of pollen exine which may be regarded as new basis to identify and classify Chinese Medicine Xihuangcao and its Related Species.