贯众属的叶表皮特征

对贯众属（Cyrtomium）19种植物和近缘类群的15种植物的叶表皮形态特征进行了光学显微镜观察,并对包括贯众属3个亚系的模式种在内的12个种进行了扫描电镜观察。结果显示贯众属的叶表皮细胞为多边形或不规则形,垂周壁近平直、弓形、浅波状、波状至深波状。贯众属的气孔器分布于叶片下表皮,有无规则型、横列型和极附型三种类型,其中无规则型是主要的气孔器类型。气孔器表面观为宽椭圆形,长椭圆形,稀为近圆形,气孔外拱盖内缘近平滑、浅波状至啮齿-浅波状。大多数种类叶片表面角质膜具条纹,并常有条状隆起,或具颗粒等附属物。目前研究未发现可作为邢公侠二系四亚系诊断特征的明显的叶解剖特征。

Structural Characters of Leaf Epidermis in Cyrtomium (Fern)

The leaf epidermis of 19 species representing all four subseries of Cyrtomium,and 15 allied groups was investigated under light microscopy,of which twelve species including types of three subseries of Cyrtomium were observed under scanning electron microscopy.The form of epidermal cells of the Cyrtomium was usually polygonal or irregular,with the anticlinal walls nearly straight,arched,sinuolate,sinuous to sinuate.The stomatal apparatus in all species only existed on the abaxial epidermis.The major stomatal...