Abstract:In order to explore asexual reproduction root mechanism of Tamarix taklamakanensis, we collected semihard wood stems of T. taklamakanensis and measured the contents of endogenous hormones IAA, GA3, ZR and ABA during the rooting period, and soluble sugar and protein contents and the related enzyme activities such as PPO, POD, SOD and IAAO in stems during cuttings. The results showed as follows: (1) the endogenous hormones of T. taklamakanensis varied with the process of rooting. The content of IAA can get the maximum at 35 days of cutting and shown a big fluctuation. The content of ZR changed significantly at about 55 days after cutting, showing low level to high level conversion trend. The contents of ABA and GA3 showed the process of increasing, then decreasing and then increasing, and showed the peak and the trough of change on the 15th and 55th or 80th days of cutting. (2) The rooting of T. ramosissima was closely related to oxidase activities, POD and IAAO were kept at a high level for 35 days after cutting, POD activity decreased significantly and IAAO activity increased after root cutting, PPO and SOD maintained a high activity in 15 days after cuttage cutting, and the changes of PPO activity were even and the changes of SOD activity alternated obviously. (3) Soluble sugar content of rooting cuttings showed two major changes are consumption reduced before rooting and accumulation increased after rooting. Soluble protein content showed a trend of increasing accumulation gradually after cutting. Studies have shown that high levels of IAA, ZR and low levels of GA3, ABA controled rooting cuttings together, and at the same time, IAA can promote the changes of POD, PPO and IAAO activities to affect rooting, higher activities of POD and IAAO can adjust the IAA level, high level of PPO catalyze the formation of the IAAphenolic acid complex and then induce cuttings rooting.