[目的]探讨新疆喀喇昆仑山几种苔藓植物的细胞学及孢子萌发.[方法]用显微镜观察了新疆喀喇昆仑山3种藓类植物的染色体数目,并通过光学显微镜观察,描绘和分析了另2种藓类孢子萌发的基本过程、萌发能力及发育的特点.[结果]新疆喀喇昆仑山3种 藓类植物染色体数目为:长尖叶赤藓,n=7;赤茎藓,n=5;狭网真藓,n=10,其中长尖叶赤藓和狭网真藓的染色体数目为国内首次报道.光学显微镜观察表明,卵叶盐土藓的孢子呈不规则球形,深棕色,不透明,为单细胞型孢子,接种7 d后,孢子萌发率可达62%.美姿藓的孢子呈椭圆形,黄绿色,较透明,为单细胞型孢子,接种7 d后,孢子的两极萌发率达42%.[结论]与卵叶盐土藓相比,美姿藓孢子萌发表现明显的极向,一般为单、双极.%[ Objective] The study aimed to discuss the cytological and spore germination of several bryophytes from Karakorum Mountain in Xinjiang. [ Method] The chromosome numbers of 3 kinds of bryophytes from Karakorum Mountain area in Xinjiang were observed by the microsoope and the basic process, germination capability and development feature of the spore germination for other 2 kinds of bryophytes were illustrated and analyzed through the observation by the optical microscope. [ Result ] The chromosome numbers of 3 bryophytes from Karakorum Mountain area in Xinjiang were as follows: Syntrichia longimucronata (X. J. Li) R.H. Zander,n =7;Pleurozium schreberi (Brid.) Mitt. , n =5;Bryum algovicum Sendt. , n = 10. Among them, the chromosome numbers ofS. longimucronata and B. algovicum were reported for the first time in China. The optical microscope observation showed that the spores of Pterygoneurum ovatum were in irregular spherical shape, deepbrown color, non-transparence, being the single-celled type spores, and after inoculation for 7 d, its spore germination rate could reach to 62％. The spores of Timmia megapolitana were in oval shape, yellow-green color, more transparence, being single-celled type spores, and after inoculation for7 d, its spore germination rate was up to 42％. [Conclusion] Compared to P. ovatum, the spore germination of T. megapolitana showed the obvious polarization, generally being single and double polar.
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