假冷蕨属叶表皮特征的比较形态学研究

Comparative Morphological Studies on Leaf Epidermis of Pseudocystopteris

利用光学显微镜对假冷蕨属植物叶表皮特征进行观察,并与亲缘关系较近的冷蕨属、蹄盖蕨属植物进行比较.结果显示:假冷蕨属和蹄盖蕨属植物上表皮细胞的垂周壁都有加厚,且多为波浪状;下表皮细胞的气孔密度和气孔器类型也很接近.结合分子系统学的相关结论,我们建议把假冷蕨属归并到蹄盖蕨属中.

The leaf epidermis of Pseudocystopteris is investigated under light microscopes and compared with Cytopteris and Athyrlum which have close kinship to it. The results show that the anticlinal walls of upper epidermis in Pseudocystopteris and Athyrium are a little thicker and the shape of them is wavilness; the density of stomata and the type of stomata apparatus on lower epidermis are similar. Combined with conclusion of molecular systematics, it is suggested that Pseudocystopteris should be a member of Athyrium.