In the last decade, the cultivation of ornamental flowers for cutting increased as a result of the easiness of adding value to the final product. Among the most cultivated ornamental plant stands out the specie Gypsophila paniculata. The micropropagation technique has been used for young plant production on a commercial scale. The purpose of this experiment was to reduce or even eliminate the rooting phase in vitro. The influence of the indolbutyric acid (IBA), during six acclimatization periods, on rooting was evaluated. The treatments followed a factorial scheme with three dosis (0; 500 and 1000 mg.L-1 of IBA) x six periods (5; 10; 15; 20; 25 and 30 days) in vitro rooting. These factors were arranged in a randomized block design with four replicates and twelve shoots per plot. The survival, volume of roots, fresh and dry weight for aerial part and roots were evaluated. The data were submitted to analysis of variance and regression. To propagate Gypsophila paniculata, cv. Bristol Fairy, there is a need of in vitro rooting phase, and the ideal period is between 25-30 days for later transplantation. No effect of the growth regulator (IBA) was found.
Gypsophila paniculata; growth regulator; indolbutyric acid; ornamental plants
