Effects of IBA on Hydroponics Rooting and Plant Height by Branch and Twig of Lysimachia christinae 'Aurea'.

[Objectives] Effects of IBA (Indole Butyric Acid) on rooting and plant height by branch and twig of Lysimachia christinae 'Aurea' were studied in order to research its hydroponics propagation and provide theoretical and practical basis for its reproduction and culture. [Methods] The branch and twig of L. christinae 'Aurea' were treated with IBA in the concentrations of 0, 10, 50 and 100 mg/L and with 4 h of soaking time in this study. [Results] The rooting rate, rooting number, root developing index and the plant height of the twig and branch cuttings treated with three kinds of concentrations of IBA were higher than control. The rooting rate and number of branch treated with three kinds of concentrations of IBA were significantly higher than control, while the differences of number and length of adventitious root were not obvious. The rooting rate and number, the plant height of the branch cutting were larger than that of twig. The speed of root growing on the branch was faster than that of the twig among all the treatments. After the branch cuttings were treated with 50 mg/L of IBA, the rooting rate was 100% and the rooting developing index was 1.73, which were significantly higher than the other treatments. [Conclusions] The best treatment for the branch cutting rooting of L christinae 'Aurea' was 50 mg/L of IBA solution with 4 h of soaking time. [ABSTRACT FROM AUTHOR]