摘要
本文通过光学显微镜和扫描电镜系统地研究了国产泥炭藓(Sphagnum L.)5种和1亚种的孢子形态,并通过透射电镜对白齿泥炭藓的孢壁结构进行了观察。本属孢子为辐射对称,四面体形,三裂缝明显,狭而短,微弯曲;具周壁,表面具疣或小瘤,外壁一般光滑;孢壁分为周壁、外壁和内壁;周壁皱褶状,高低不平。根据裂缝、纹饰、远极面突起等不同特征,可区分到种,为泥炭藓的系统分类和化石孢子的鉴定提供依据。
The spores of 5 species and 1 subspecies of Sphagnum in China were examined under LM and SEM,and one of them under TEM.All of the above spores are radial symmetrical, tetrahedral,rounded-triangular in polar view and 36.1—55.7μm in diameter.Among them, the size of the spores of S.cuspidatum is the largest.Trilete is distinct,narrow and slightly curved,ca.1/3—1/2 of the spore radius,margo very distinct under SEM,perine with gem- mae and verrucae.The sporoderm of Sphagnum contains perine,exine and intine.On the basis of spore morphology,the point of view that Sphagnum is a primitive genus in mosses is supported.In sporo-potlen analysis the spores of Sphagnum are easily confused with some spores of ferns.
基金
国家自然科学基金
关键词
泥炭藓
孢子形态
孢子结构
Sphagnum
Spore morphology
Sporoderm structure
