假冷蕨属孢子形态研究

Spore Morphology of Pseudocystopteris Ching

利用光学显微镜和扫描电子显微镜对假冷蕨属4种植物的孢子进行了详细观察,并与亲缘关系较近的冷蕨属、蹄盖蕨属植物孢子形态进行比较。结果表明,假冷蕨属孢子均为单裂缝,两侧对称,极面观为椭圆形,赤道面观为肾形,周壁表面具不规则脊状褶皱,连接成网状。假冷蕨属与蹄盖蕨属孢子形态特征相似,亲缘关系较近。

The spore morphologic characteristics of 4 species in the genus Pseudocystopteris were investigated under light microscope and scanning electron microscope and comparatived with Cytopteris and Athyrium which have close kinship to it. The results showed that the spores of Pseudocystopteris are all monolete,bilaterally symmetric, ellipsoidal in polar view, kidney-shaped in equatorial view, and perispore with abnormity ridge fold and connected reticulation. The spore morphologic characteristics of Pseudocystopteris and Athyriurn are very similar and indicated the two genera have close kinship.