Efeitos de reguladores vegetais no enraizamento de estacas caulinares de Poncirus trifoliata var. monstrosa (T. Ito)

摘要

The work aimed study the effects of plant growth regulators on the rooting of 'Flying Dragon' stem cuttings [Poncirus trifoliata var. monstrosa (T. Ito)]. Citrus branches were collected of each season of the year (4 experiments). Cuttings (10-cm-long) containing one half leaf were obtained from these branches. The base of the cuttings was treated with plant growth regulators in the talc formulation: Control (H2O); IBA 0.5%; NAA 0.5%; IBA + caffeic acid 0.5%; and NAA + caffeic acid 0.5%. The cuttings were planted in trays containing coconut fiber and maintained for three months in the misting chamber. The cuttings collected in the fall and treated with a mixture of NAA 0.5% and caffeic acid at 0.5% showed higher rooting percentage.