新疆曲尾藓属10种植物蒴齿和孢子的形态观察

该研究通过光学显微镜(LM)和扫描电镜(SEM)观察了曲尾藓属(Dicranum Hedw.)10种植物的蒴齿和孢子的形态特征。结果表明:(1)曲尾藓属10种植物的孢蒴均为圆柱形。(2)孢子球形、近球形、椭圆形或三角状卵形,颜色为黄色、棕色或黄褐色;近极面向内凹,纹饰为疣状、颗粒状或芽孢状。(3)曲尾藓属10种植物的蒴齿多为披针形,但也有阔披针形,颜色为杏黄色、深红色、褐黄色或红褐色;纹饰为条状或疣状,具穿孔成网状结构,一些种无穿孔成平滑结构,表面具细疣。该研究结果为曲尾藓属属下类群划分提供了分类依据,并为苔藓植物系统分类、演化研究提供基础资料。

Study on Peristome and Spores of Ten Species of Dicranum in Xinjiang

The morphological characteristics of peristome and spores of 10 species of Dicranum Hedw. were observed by light microscope (LM) and scanning electron microscope (SEM). The results show that: (1) the capsules of 10 species of Dicranum are cylindrical. (2) The spores are spherical, near spherical, orellipseor triangular ovate, they are yellow, brown, oryellowish brown; the faces near pole concave, the ornamentation is verrucous, granular, spore. (3) The peristome of 10 species of Dicranum mostly are lanceolate, some are broad lanceolate. These peristomes are apricot yellow, oxblood red, browinish yellow or reddish brownin color; the ornamentation is striate and verrucous, perforated into a net structure. Some species are smooth and lack of perforation, with verruca on the surface. The studies provide a basis for the taxonomic division of Dicranum and basic information for the taxonomic classification and evolution of bryophytes.