2018年11月18日 星期日
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
2018年 第27卷 第3期 页码[115-117]
Abstract

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
Key wordsDendrobium huoshanense C. Z. Tang et S. J. Cheng; seed germination; protocorm development; anatomical structure
作者张凤, 朱艳, 许娜, 宋裕丞, 秦民坚
所在单位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
点击量182
基金项目中央高校基本科研业务费专项资金项目(3010020037)