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.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
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)
关键词
齿瓣石斛
种子
贮存条件
形态发育
Dendrobium devonianum.Paxt
seed
storage conditions
morphogenesis
