Effects of K-IBA treatments on adventitious rooting and endogenous hormones contents of shoot cuttings of Thuja occidentals L.
The shoot cuttings of Thuja occidentals L.were collected and treated with indole-3-butyric acid (K-IBA) (concentrations 3 000,6 000 and 10 000 mg/L),Water treatment as a control.The rooting rate,average root length,the longest root length and average rooting number were recorded after cutting for 60 days;The endogenous hormones(IAA,GA,ABA,ZT) contents of cuttings of 6 000 mg/L K-IBA and control treatment were detected every 15 days interval.The significant difference was found among the four treatments.K-IBA promoted the rooting of Thuja occidentals L,Among them,6 000 mg/L K-IBA has the best treatment effect,which was significantly higher than that of CK.The rooting rate was 87.78％,the number of rooting was 22.33,the average root length was 12.33 mm,the longest root length was 75.20 mm.Compared with the control,the content of endogenous IAA and GA increased in 6 000 mg/L K-IBA treatment group,while the contents of endogenous ABA and ZT decreased,then promoted the rooting.K-IBA regulates the changes of endogenous hormones IAA,GA,ABA and ZT,and the dynamic changes of endogenous hormones regulate the formation of adventitious roots in the process of rooting.
NETL
NSTL
万方数据
维普
