ISHS Acta Horticulturae 716: VII International Protea Research Symposium
THE EFFECT OF WOUNDING, IBA AND PH OF THE ROOTING MEDIA ON THE ROOTING OF LEUCOSPERMUM ´HIGH GOLD´ STEM CUTTINGS |
| Authors: | J.A. Rodriquez-Pérez, A.M. de Leon-Hernandez, M.C. Vera-Batista, I. Rodriguez-Hernandez, A.R. Rodriguez-Herrera |
| Keywords: | Proteaceae, protea, propagation, terminal cuttings, hormonal concentration |
| Abstract:
Leucospermum ‘High Gold’ (L. cordifolium x L. patersonii), one of the most interesting pinkcushion cultivars introduced in the Canaries, can be propagated from terminal and basal cuttings. To study the effect of wounding (two shallow and opposite incisions), IBA treatments (0, 2000, 4000 ppm) and pH of the rooting media (polystyrene grains: neutralized peat moss, pH 6; polystyrene grains: unneutralized peat moss, pH 4) on the rooting process, an experiment was carried out in which terminal cuttings were rooted with bottom heat (22 ± 2°C) under a fog system. Wounding favoured root formation in cuttings without hormonal treatment in the first phases of rooting in the more acid substrate. In general, rooting was faster in the more acid substrate. The combination of IBA + wounding did not improve percentages of transplantable cuttings versus IBA alone. Most of treatments in which IBA was applied gave percentages of transplantable cuttings of 80% or higher at 8 weeks from planting. At the end of the trial, at 20 weeks, all treatments, except one, showed rooting percentages of 90% or higher. The substrate with neutralized peat moss did not improve rooting significantly compared with the substrate with unneutralized peat moss. | |
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