齿瓣石斛种子保存和萌发形态发育过程研究  

Seed Preservation and Germination Process of Morphological Development of Dendrobium devonianum.Paxt

作　　者：崔秋华[1] 孙永玉[1] 李昆[1] 段明伦 周志美[3] 黄传响 

机构地区：[1]中国林业科学研究院资源昆虫研究所,云南昆明650224 [2]云南省龙陵县林业局,云南龙陵678300 [3]云南省保山市森林资源管理总站,云南保山678000 [4]四川省攀枝花林业局,四川攀枝花617000

出　　处：《江西农业大学学报》2012年第3期533-536,555,共5页Acta Agriculturae Universitatis Jiangxiensis

基　　金：国家"十二五"科技支撑计划项目(2011BAD3880105;2011BAD38880404)

摘　　要：石斛属植物种子小,无胚乳,自然条件下,需与真菌共生才能萌发,萌发率极低。以齿瓣石斛的种子为研究对象,研究不同贮存条件对种子萌发率和活力的影响,并对种子萌发中的形态发育过程进行观察,试验结果表明,齿瓣石斛种子细小,解剖镜下观察呈纺锤形,由1层透明的种皮和1个种胚组成;种子比较适宜贮存温度是0～5℃,贮存1个月时种子萌发率和染色率较高,随着时间的延长,种子萌发率和染色率逐渐降低;种子接种后,吸水膨胀逐渐转绿,形成椭球体,椭球体以2条途径发育成幼苗,一是原球茎途径,二是根状茎途径。Dendrobium plant seeds,small,no endosperm,under natural conditions,can germinate when symbiotic with fungi and the germination rate is very low.Seeds of Dendrobium devonianum were used to study the effects of different storage conditions on seed germination and vigor,and the morphological development of the seed was observed.The results showed that：the seeds of Dendrobium devonianum were small,under anatomical microscope,they were spindle-shaped and consisted of a layer of transparent seed coat and one embryo.0-5℃in refrigerator was suitable for storage,after storage for one month,the seed germination rate and staining rate were higher.The seed germination rate and staining rate decreased gradually with time prolonged.After inoculation,the seed swelled gradually and turned green,and formed an ellipsoid. The ellipsoid then developed into seedlings in two ways,one way of original bulb,and the other of rhizome.

关 键 词：齿瓣石斛 种子 贮存条件 形态发育 

分 类 号：S723[农业科学—林木遗传育种]