VEGETATIVE PROPAGATION IN DALBERGIA SERICEA: INFLUENCE OF GROWTH HORMONES ON ROOTING BEHAVIOUR OF STEM CUTTINGS

Abstract

Vegetative propagation by stem cuttings in Dalbergia sericea was studied. Exogenous applications of growth hormones (IAA, IBA, GA₃) influenced rooting behaviour in stem cuttings differently. Sprouting appeared on all cuttings irrespective of treatment. However, sprouting in control and GA₃ treated cuttings dried very early. IBA (100 ppm ) seemed to be more effective in inducing rooting (per cent cuttings rooted, number of roots per cutting and average length of roots) in D. sericea followed by IAA (100 ppm), although callus formation was seen on cuttings of all the treatments. Rooting was completely absent from cuttings in the control as well as with GA₃. The possible role of these hormones in rooting of stem cuttings of this species is discussed.