绢蒿属8种植物果实微形态特征及其分类学意义

为寻找绢蒿属系统学的新证据,应用解剖镜和扫描电镜对我国8种绢蒿属植物的果实微形态特征进行了比较观察。结果表明,绢蒿属8种植物果实形状相似性较高,呈倒卵形或长倒卵形,直或稍弯曲;果脐圆形,常偏向一侧;顶端中央均可见花柱残留物,边缘具衣领状环;果实表面纹饰为搓板状和不规则皱褶纹饰。这些果实微形态特征中,果实的表面纹饰具有一定的差异,特别是次级结构,可作为绢蒿属植物区分种的参考性状之一。

A Micro-morphological Study on Fruit of 8 Species in Seriphidium and Its Taxonomic Significance

To discuss the systematic problem of Seriphidium(Bess) Poljak.,the micro-morphological features on fruit of 8 species in China were observed under light microscope(LM) and scanning electron microscope(SEM) for the first time.The results show that the shape of most fruit was inversely-ovate or lengthened inversely-ovate;the hilum was round,which located top beside of fruit;there was a collar-ring on the top of fruit,and there were many remainder from style in central of collar-ring;the surfaces of fruit have washboard-form and obviously fold ornamentation.The surface micro-morphology were different to some extent between species,which can be used to classify of Seriphidium(Bess) Poljak.