Abstract:

The spore morphology of 9 species of 3 genera of Chinese liverworts was studied by scanning electron microscopic observation. They are Riccia huebeneriana Lindenb., R．hantamensis Perold.,R．cavernosa Hoffm.,R．warnstorfii Limpr. ex Warnst.,R．frostii Aust.,R．chinensis Herz., Asterella yoshinagana (Horik.) Horik., A．sanguinia L. et L., and Preissia quadrata (Scop.) Nees. There were evident morphological differences in spores among the above three genera. Difference of species morphology in the same genus was also observed. Therefore in the above genera and species the spore wall ornamentation can be regarded as a criterion for taxonomic specificity. Meanwhile, slight difference in morphological characters of the same species collected from different sites was observed and reckoned to be an ecological adaptation.

中国苔类孢子形态的研究

贾渝¹ 吴鹏程¹ 汪楣芝¹ Elena N.ANDREJEVA²

(1. 中国科学院植物研究所,北京,100093；2. Komalov Botanical Institute,Russian Academy of Sciences,St .Petersburg,197376 Russia)

摘要：通过电镜扫描方法,研究了3个属9种的中国叶状体苔类植物:稀枝钱苔(Riccia huebeneriana Lindb.)、宽翅钱苔(R. hantamensis Perold.)、曲脊钱苔(R. cavernosa Hoffm.)、R. warnstorfii Limpr. ex Warnst.、小孢钱苔(R. frostii Aust.)、中华钱苔(R. chinensis Herz.)、东亚花萼苔(Asterella yoshinagana (Horik.) Horik.)、矮网花萼苔(A. sanguinia L. et L.)、背托苔(Preissia quadrata) (Scop.) Nees.).对上述种类的孢子形态特征进行了描述.研究发现,上述3属的孢子形态特征具有明显差异.而且同一属的孢子形态特征也存在差异,甚至可以作为种类划分的依据之一.同时采自不同地点的同一种类其孢子形态有时具微小的差别.这可能是由于生态环境差异所造成的.

关键词 孢子形态 中国苔类 电镜扫描 系统学

Key words: spore morphology, Chinese liverworts, scanning electron microscope, systematics