Abstract:

In order to discuss the cottage rotting mechanism and lay the theoretical foundation for enhancing the cottage and rooting rate of Sabina davurica (Pall.) Ant, the changes of 5 endogenous hormones during the rooting process of cutting of Sabina davurica (Pall.) Ant. was detected by improved HPLC. The results showed that the cuttings had a senescence process and the contents of IAA, ABA, IAA/ABA and GA in the root inducing parts of cuttings decreased during the initial rooting stage, but the changes of the ZT were unclearly. The external indolebutyric acid (IBA) and nathphylacetic acid (NAA) could increase the contents of the contents of IAA, IAA/ABA in the root inducing parts of cuttings, but they decreased the contents of GA in the same parts. All the changes were good for rooting and they could increase the survival rate. All treatments could not change the contents of ABA, but they could promote the transportation of IAA from the top to bottom of cuttings. The higher IAA/ZT and the lower GA concentration were good for the formation of callus tissue and adventitious root primordia. The dynamic balances of endogenous hormone regulated inducing of adventitious root.