关键词: 毛白杨, 嵌合体, 生根机制

Abstract:

In this paper the relationships between the rooting of the cutting of the chimera of Chinese white poplar (Populus tomentosa Carr.)and the activities of peroxidase,indoleacetate oxidase and the contents of phenol,flavoid materials were analyzed.In the stages of cutting rooting of the chimera of Populus tomentosa,the activity of peroxidase increased after cutting and got to the first peak at the 5th day,and followed to decrease and got to minimum at the 7th day,the second peak appeared at the 17th day.The change curve found in normal Populus tomentosa was reverse to the chimera at first 7 days.The indoleacetate oxidase activity was contrary to peroxidase.The changes in contents of phenol and flavoid were accordant in the uptrend,and were similar to the activity of peroxidase,that of normal Chinese white poplar were reverse to the chimera.As a conclusion,the chimera rooting phase were related to the activities of peroxidase and indoleacetate oxidase as well as the contents of phenol and flavoid materials.Normal Chinese white poplar did not easily root because it could not satisfy the relative conditions.

Key words: Populus tomentosa Carr., Chimera, Rooting mechanism