变豆菜属11种植物的叶表皮微形态特征研究

为探讨叶表皮微形态特征在变豆菜属植物中的系统及分类学意义,我们利用扫描电镜对变豆菜属11个种(13个居群)的叶表皮微形态特征进行了研究。结果表明,11种变豆菜属植物叶表皮微形态特征较稳定,上表皮细胞轮廓大多不清晰,初级蜡质纹饰均存在条状纹饰,表皮上均粘附着颗粒物;下表皮均存在气孔,气孔周围存在均匀分布的纹饰,气孔外拱盖表面大多有颗粒状纹饰,并且其二级纹饰类型、气孔周围纹饰、气孔外拱盖内缘纹饰等叶表皮微形态特征上存在一定差异。上述研究结果可为探讨变豆菜属类群界定及种间关系提供重要依据。

Leaf Epidermal Micromorphological Characters of 11 Species of Sanicula L.

In order to explore the systematic and taxonomic significance of leaf epidermal micromorphological characteristics in Sanicula, the leaf epidermal micromorphological characteristics of 11 species(13 populations) of Sanicula were studied by scanning electron microscopy. The micromorphological characteristics of leaf epidermis of 11 species of Sanicula were stable, the adaxial epidermal cell comour were mostly unclear, dense stripes or sparse stripes in primary waxy ornamentation, and the granula were adhered to the epidermis. All the abaxial epidermis have stomata, the ornamentation is uniformly distributed around stomata, and almost stomatal outside ornamentation have granular. There are some differences in the micromorphological characteristics of the leaf epidermis such as the secondary ornamentation, the stomatal ornamentation, and the inside ornamentation of the stomata. The above research results can provide important data for exploring the definition and interspecific relationship of Sanicula.