Effect of cutting position and indole butyric acid (auxin) concentration on rooting response of Araucaria heterophylla

Abstract

This study was carried out to determine the effects of cutting position (tip, middle and basal) and different concentrations of IBA (IBA) (0, 5, 7.5 and 11g/L) on the rooting and shooting performance of Araucaria heterophylla. Two factorial experiments were conducted. Number of leaf, number of adventitious root and root length produced by cutting materials and the survival rates were measured. These parameters were significantly influenced by the interactive effect of cutting position and hormonal concentration. The interaction between tip cuttings and 11 g/L IBA concentration had higher root number, leaf number and root length as compared other interactions had not rooting and shooting performance on the cutting materials. Vegetative propagation of A. heterophylla through cuttings can be appropriately achieved by treating cuttings with IBA.