以易生根的山海关杨为处理、不易生根的毛白杨为对照 ,对扦插生根过程中不同时间的POD酶活性、I AAO酶活性及酚含量进行了测定。结果表明 ,易生根的山海关杨与毛白杨有较大区别 ,而与以前所做毛白杨嵌合体在 3项指标变化曲线中有较大的一致性。山海关杨POD酶活性从扦插后开始较高 ,到第 4天降到低谷 ,以后再升高 ,第 8天为一高峰 ,以后再降低之后波动 ;IAAO活性与POD酶活性基本上恰好相反 ;酚含量总体趋势是前期较低后期较高 Taking the easy-rooted Shanhaiguan Yang as the treatment and the not-soaked Populus tomentosa as control, POD activity, I AAO activity and phenol content were measured at different time during cutting rooting. The results showed that there was a great difference between Populus euphratica and Populus tomentosa which was easy to root, and there was a great consistency with the Populus tomentosa chimera in three curves. The activity of POD in Yangshan was higher from the beginning of cutting and then dropped to the trough on the fourth day, and then increased again at the eighth day, and then peaked on the eighth day and then decreased afterward. The activity of IAAO was almost opposite to the activity of POD; The overall trend of the content is higher in the early lower period