中国真藓属孢子形态的研究

中国科学院大学学报

中国真藓属孢子形态的研究

杜桂森,汪楣芝,张玉龙

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1998-09-10 发布日期:1998-09-10
通讯作者: 杜桂森

A Study on the Spore Morphology of Bryum Hedw. in China

DU Gui-Sen, WANG Mei-Zhi, ZHANG Yu-Long

Received:1900-01-01 Revised:1900-01-01 Online:1998-09-10 Published:1998-09-10
Contact: DU Gui-Sen

摘要/Abstract

摘要：

通过光学显微镜和扫描电子显微镜观察了中国真藓属Bryum Hedw．13种孢子的形态特征。根

据外壁纹饰可分为:类型I，棒状突起顶端圆钝；类型Ⅱ，棒状突起顶端尖或具微突起；类型Ⅲ，棒状突

起顶端膨大成半球形。根据孢子直径的大小，可分3个类群。以上显示了物种间的遗传分化及其相似

性，证明真藓属确为一个自然分类群，真藓属孢子的形态比丝瓜藓属Pohlia Hedw．进化。这给苔藓的

孢子形态研究及分类和系统演化的研究提供了新的资料。

关键词: 真藓属, 孢子形态

Abstract:

Spore morphology of thirteen species of the genus Bryum Hedw. were observed

by LM and SEM. The results show that the ornamentation of spore exine could be divided

into three types: Type I , blunt at the top of baculate processes, to which four species be-

long: Bryum argenteum, B. lonchocaulon , B. uliginosum and B. arcticum. Type Ⅱ,

sharp or with small processes at the top of baculate processes, represented by seven species:

B. pallescens, B. caespiticium, B. pallens, B. pseudotriquetrum, B. paradoxum, B.

alpinum and B. thomsoii. Type Ⅲ, expanded into hemispherical-shaped at the top of bac-

ulate processes, represented by two species: B.coronatum and B.sauteri. The

Bryum species may also be divided into three groups according to the variation of spore diam-

eter. Group I , with spore diameter under 10 μm, including one species, B. uliginosum.

Group Ⅱ, with spore diameter 11～20 μm, including seven species: B. argenteum, B.

alpinum, B. coronatum, B. pallens, B.paradoxum, B.sauteri, B.thomsonii.

Group Ⅲ, spore diameter 21～30 μm, with five species: B. pallescens, B. caespiticium,

B. pseudotriquetrum, B. lonchocaulon, B. arcticum. There are resemblances of spore

morphology and exine ornamentation among the thirteen species. In the view of palynology,

the genus Bryum is a natural taxon which is more advanced than the genus Pohlia Hedw.

But spores of thirteen species are different at some characters such as diameter, shape of

proximal leptoma, etc., which indicates the genetic differentiation in the genus Bryum.

Key words: Bryum, Spore morphology

杜桂森,汪楣芝,张玉龙. 中国真藓属孢子形态的研究[J]. 中国科学院大学学报.

DU Gui-Sen, WANG Mei-Zhi, ZHANG Yu-Long. A Study on the Spore Morphology of Bryum Hedw. in China[J]. .

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