广西蕨类植物孢子形态的研究Ⅲ.凤尾蕨科

Spore morphology of pteridophytes from Guangxi Ⅲ.Pteridaceae

利用光学显微镜和扫描电子显微镜对广西产凤尾蕨科及其近缘科蕨科、姬蕨科和碗蕨科5属9种植物的孢子形态进行了观察研究,详细描述了9种植物孢子的形态及表面纹饰特征。井栏边草、刺齿凤尾蕨、隆林凤尾蕨、剑叶凤尾蕨、林下凤尾蕨、蕨和碗蕨植物的孢子为三裂缝,辐射对称;极面观为钝三角形,赤道面观为半圆形或超半圆形;栗蕨和姬蕨植物孢子为单裂缝,两侧对称,极面观椭圆形,赤道面观豆形。9种植物的孢子外壁表面具有脊状、瘤-皱波状、瘤-棒状、丝毛状、疣-穴状、颗粒-条纹状、瘤状和皱状8种纹饰类型,各科属、种间具有一定差异。根据孢粉特征,讨论了它们的分类学意义。

The spore morphology of 9 species,belonging to 5 genera in Pteridaceae,Pteridiaceae,Hypolepidaceae and Dennstaedtiaceae distributing in Guangxi of China,was studied and compared under LM and SEM.The spores of Pteris multifida,P.dispar,P.splendida,P.ensiformis,P.grevilleana,Pteridium aquilinum and Dennstaedtia scabra are trilete,radiosymmetrical,subtriangular in polar view and hemispherical in equatorial view.The spore of Histiopteris incisa and Hypolepis punctata is monolete and bilaterally symmetrical,elliptical in polar view and kidney-shaped in equatorial view.The types of ornamentation are lophate,tuberculate-rugulate,tuberculate-baculate,sericate,verrucate-foveolate,granulate-striate,tuberculate or rugulate.The differences among the spores of these genera and species and their taxonomic significance were discussed.