濒危植物革苞菊地下器官解剖学研究

Anatomical Study on Rhizome of Endangered Plant Tugarinovia mongolica

革苞菊为多年生草本植物,叶基生.多数植株在地上部分为两株以上,而地下部分却生长在共同的根上并具分枝.由于其地下部分行使根的功能,长期以来,人们一直认为革苞菊的地下部分是根.本文采用石蜡制片法,对革苞菊地下部分的内部结构进行了详细的解剖学观察,结果证明其分枝以下部分为根的结构,分枝以上部分为茎的结构,分枝处为根茎转变区.同时探讨了革苞菊的地下茎与环境的适应特性.

Tugarinovia mongolica is a perennial plant with radical leaves. Most plants seem like two single plants on the ground,but in fact they connect to one root underground. For a long time, people take the underground part as a root of T. mongolica,because of it exercising the function of the root. The internal structure of the underground part of T. mogolica was studied by the paraffin experiment. The result shows that the structures above and below the branch are the stems and roots respectively,and the branch is a transition zone for stems and roots. The adaption of the underground stems to environment is also discussed.