霍山石斛种子萌发及原球茎发育的解剖结构观察  

Observation on anatomical structures of seed germination and protocorm development of Dendrobium huoshanense

作　　者：张凤 朱艳 许娜 宋裕丞 秦民坚 ZHANG Feng;ZHU Yan;XU Na;SONG Yucheng;QIN Minjian(Department of Resources Science of Traditional Chinese Medicines,School of Traditional Chinese Pharmacy,State Key Laboratory of Natural Medicines,China Pharmaceutical University,Nanjing210009,China)

机构地区：[1]中国药科大学中药学院中药资源系天然药物活性组分与药效国家重点实验室,江苏南京210009

出　　处：《植物资源与环境学报》2018年第3期115-117,共3页Journal of Plant Resources and Environment

基　　金：中央高校基本科研业务费专项资金项目(3010020037)

摘　　要：霍山石斛（Dendrobium huoshanense C.Z.Tang et S.J.Cheng）根茎具有益精强阴、生津止渴和补虚羸等功效,被批准实施地理标志产品保护。Changes in anatomical structures of longitudinal section during processes of seed germination and protocorm development of Dendrobium huoshanense C. Z. Tang et S. J. Cheng were observed. The results show that embryo of D.huoshanense seed breaks through seed coat after water swelling,and protocorm is formed by four morphological changes of proembryo,globular embryo,heart-shaped embryo and torpedo-shaped embryo after culturing for 30 d. Apical meristem of protocorm can be evidently divided into tunica layer L1,tunica layer L2,and corpus layer L3 from outside to inside,and its development follows the ＂tunica-corpus theory＂. Structure of protocorm has polarity,and the end away from embryo suspensor is able to differentiate leaf primordium,then develops into cotyledon,meanwhile,the other end grows many white villous rhizoids,and protocorm stage enters rhizome stage with increasing of vascular bundles inside it; when the rhizome gradually becomes larger,vascular bundles in rhizome extend to the basal part and form vascular bundles in root,and develop into 3-5 adventitious roots,then form an intact plant.

关 键 词：霍山石斛 种子萌发 原球茎发育 解剖结构 

分 类 号：Q949.718.43[生物学—植物学] Q944.5