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This study analyses the influence of auxin and wounding on the rooting of stem cuttings of Protea ‘Susara’ (P. magnifica × P. susannae) prepared from proleptic shoots. Two assays were carried out. Terminal cuttings, 10-15 cm long, treated with 4000 mg L–1 of indole-3-butyric acid (IBA) and wounded or not were used in the first experiment. The combination of wounding + IBA did not significantly improved rooting compared with the use of IBA alone (70% and 53.3% of transplantable cuttings, respectively). Three levels of IBA (0, 2,000 and 4,000 mg L–1 ) , with or without wounding, and cuttings including the total length of the shoot were used in the second assay. At the end of the trial (24 weeks), wounded cuttings treated with 2,000 mg L–1 or 4,000 mg L–1 of IBA yielded 90% of transplantable cuttings. The combination of wounding + IBA significantly favoured rooting in comparison with the use of IBA or wounding alone.

Short communication. Use of proleptic shoots in the cutting propagation of Protea ‘Susara’ (Proteaceae)