东亚砂藓茎段长度对繁殖和生长能力影响的测定  

Influences of Stem Lengthson on Reproduction and Growth Capacity of Racomitrium japonicum

作　　者：夏乔莉 于天泽[1] 胡治祥 于晶[1] 郭水良[1] 

机构地区：[1]上海师范大学生命与环境科学学院,上海200234

出　　处：《安徽农学通报》2014年第9期20-21,25,共3页Anhui Agricultural Science Bulletin

基　　金：上海市科委(11391901200;12490502700)项目的经费资助

摘　　要：东亚砂藓(Racomitrium japonicum)是一种适合于立体绿化的观赏藓类植物。通过设置不同强度的切茎处理,形成平均为3.65、5.05和7.77mm的配子体茎段,撒播于表面有薄层泥炭土-蛭石的棕榈垫这一立体绿化载体上,经过85d的培养,比较不同茎段长度下东亚砂藓的生长情况。结果表明,以茎段为5.17mm处理的新枝/旧枝比率、总长度、表面积、枝与叶尖数、鲜重/干重比值最高。因此,今后在对东亚砂藓进行扩繁工作时,茎段长度是一个应重点考虑的因素。Racomitrium japonicum is a ornamental moss species suitable for vertical greening.Gametophytes were cut into stem sections of 3.65、5.05 and 7.77 mm,respectively,then planted onto vertical planting carri-ers （a palm pad with a thin layer of peat and vermiculite）.After a 85-day culture,their growth indices were measured to compare the influences of stem lengths on the growth and reproduction capacity of R.ja-ponicum.Our studies showed that the gametophytes of 5.17 mm in length have highest indices including the length ratio between newly-developed and old stems and branches,total stem and branch length,total area,branch and leaf projection number,fresh weight/dry weight.Therefore,the stem length of gametophytes should be paid attention to in the reproduction of R.japonicum.

关 键 词：东亚砂藓 配子体 茎段长度 再生 

分 类 号：Q949.35[生物学—植物学]