垂蒴真藓原丝体发育特征的研究  

Study on the Characteristics of Protonema Development of Bryum uliginosum

作　　者：李敏[1] 赵建成[1] 黄士良[1] 范庆书[1] 张元明[2] 

机构地区：[1]河北师范大学生命科学学院,石家庄050016 [2]中国科学院新疆生态与地理研究所,乌鲁木齐830011

出　　处：《西北植物学报》2005年第2期363-367,共5页Acta Botanica Boreali-Occidentalia Sinica

基　　金：国家自然科学重大研究计划项目( 004033) ;河北省自然科学基金资助项目 (303150 );河北省教育厅项目 (2002235 )

摘　　要：在室内培养垂蒴真藓 Bryumuliginosum 孢子的基础上,对其孢子萌发、原丝体发育及配子体发生的全过程进行了跟踪观察.结果表明:该种孢子萌发后直接产生绿丝体,而轴丝体和假根仅在绿丝体上产生;配子体原始细胞产生于绿丝体基部细胞或轴丝体上.由此可以看出:垂蒴真藓属于真藓型孢子萌发型 Bryum-type .On the basis of the culture of Bryum uliginosum spores, the processes of spore germination, protonema development and gametophyte were observed. The results showed that spores germinated breaking the exospore and producing chloronemata directly, while caulonemata and rhizoids could differentiated only from chloronemata. The original cell of gametophyte was formed on the base of chloronemata or caulonemata. So it could be concluded that Bryum uliginosum is Bryum-type.

关 键 词：垂蒴真藓 原丝体发育 孢子萌发型 

分 类 号：Q949.352[生物学—植物学]