Enraizamento adventi´cio de estacas do maracujazeiro silvestre Passiflora mucronata Lam.: Forma de veiculac¸a&tild;o e concentrac¸o&tild;es do a´cido indol-3-buti´rico

Abstract

Passiflora mucronata Lam. is an ornamental, medicinal plant and resistant to bacterial blight on leaves. In addition, it is highly resistant to anthracnose in fruits and branches. The objective of this study was to evaluate the vehicultaion way, liquid or solid, and concentrations of indole-3-butyric acid (IBA) on adventitious rooting of P. mucronatacuttings. The experiment was carried out in a randomized block design in a 2×5factorial design (IBA vehiculation ways: liquid and solid × IBA concentrations: 0; 250; 500; 750 and 1000 mg L-1for liquid or mg Kg-1for solid), with four replicates with 16 cuttings each. The characteristics evaluated were rooting (%), root number, longest root length (cm), root volume (cm3) and dry weight of root (g). It was found that the rooting of P. mucronata Lam. does not depend on the way IBA is conveyed, solid or liquid, but the quality of the root system, evaluated by means of the number, volume and dry mass of roots was superior to the one achieved whensolid IBA was used. The behavior of rooting, number and length of roots increased linearly up to the maximum concentration of IBA (1000 mg L-1 or mg Kg-1).