薄鳞蕨属(中国蕨科)植物的孢子形态研究

Observation on the spore morphology of the genus Leptolepidium (Sinopteridaceae)

对薄鳞蕨属 5种 3变种的孢子形态进行了光镜和扫描电镜观察。该属植物的孢子明显地分为两种类型 :薄叶薄鳞蕨和杜氏薄鳞蕨的孢子为近球形 ,周壁为鸡冠状或拟网状纹饰 ;而华北薄鳞蕨、华西薄鳞蕨和绒毛薄鳞蕨的孢子为四面体状球形 ,周壁表面近光滑。第一种类型的孢子也存在于粉背蕨属 。

Spore morphology of five species and three varieties of Leptolepidium was examined under LM and SEM. Two distinctive types of spores were found: subglobose spore with cristate or reticulate perine in L. dalhousiae and L. duthiei, and tetrahedral-globose spore with almost smooth perine in L. kuhnii, L. caesium and L. subvillosum. The first type of spores is also represented in the genus Aleuritopteris. The relationship between Leptolepidium and Aleuritopteris needs more studies.