沙芥和斧形沙芥营养器官的解剖学观察

ANATOMICAL OBSERVATIONS ON NUTRITIVEORGANSOF PUGIONIUM CORNUTUMAND P. DOLABRATUM

本文对沙芥属（Ｐｕｇｉｏｎｉｕｍ）的两个种：沙芥（Ｐ．ｃｏｒｎｕｔｕｍＧａｅｒｔｎ．）和斧形沙芥（Ｐ．ｄｏｌａｂｒａｔｕｍＭａｘｉｍ．）的根、茎、叶做了解剖学观察。观察结果表明沙芥和斧形沙芥属于肉质多浆类旱生植物，体内薄壁组织发达，机械组织很少，适于作为食用植物予以开发。另外沙芥和斧形沙芥具有二元型的初生根、老根肉质化、有分泌细脆等这些十字花科植物的特征。这两个种之间在根、叶的结构上也有所差异。

The anatomical observations on the roots,stems and leave of P.cornutum and P.dolabratum have been taken in this paper.The results show that their nutritive organs possess a lot of parenchyma but little mechanical tissue,and may be developed green food.They are belonged to succulent xerophytes.In addition,the two species have some characteristics such as diarch premery xylem.fleshy roots and secrete cells that the Cruciferae plants often have.There are also some differentiations in the structure of leaf and roof between the two species.