毛白杨嵌合体扦插生根相关理化特性分析

对自宁晋县获得的毛白杨嵌合体扦插生根过程的动态跟踪分析表明，嵌合体过氧化物酶活性在扦插初期呈上升趋势，第5d升至高峰，之后下降，第7d至低谷，第17d又出现一高峰，而毛白杨没有此规律，并且前期与此恰好相反；酚类、黄酮类物质与过氧化物酶活性变化相似，也有两个高峰，毛白杨中变化与嵌合体相反，且含量高于嵌合体；吲哚乙酸氧化酶活性变化规律与过氧化物酶刚好相反。试验证明嵌合体易生根与过氧化物酶活性、吲哚乙酸氧化酶活性及酚类、黄酮类含量密切相关，是协同作用的综合结果，而毛白杨不易生根也恰好是不能满足这些要求。

ANALYSIS OF PHYSIOLOGICAL AND BIOCHEMICAL CHARACTERISTICS RELATED TO CUTTING AND ROOTING OF CHIMERA IN POPULUS TOMENTOSA CARR.

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.