Propagação vegetativa na produção de mudas de espinheira-santa (Maytenus ilicifolia Mart. ex Reissek)

Abstract

The espinheira-santa (Maytenus ilicifolia Mart. Ex Reissek) is a species of the family Celasrtraceae, and stands out for its growing use in folk medicine, and pharmaceutical, mainly for the control of stomach diseases. However, due to the commercial interest of the species,there has been anthropogenic exploratory actions under it, which increasingly decrease its occurrence in the natural habitat. This work aimed to evaluate different doses of indole-butyric acid (IBA) in the rooting of cuttings and alporques at the experimental farm of the Universidade Tecnológica Federal do Paraná, Campus Dois Vizinhos. Cuttings originating from semilenous branches were prepared and treated with IBA (0, 1,500, 3,000 mg L-1), remaining in the shade under constant irrigation, and evaluated at the end of 90 days. The alpores were harvested in upper crown branches of adult plants of espinheira-santa, which were partially defoliated, ringed, and submitted to different doses of IBA (0, 1,500, 3,000 mg L-1). At six months the alporques were detached from the mother plant to be submitted to the evaluation. The data were submitted to the Tukey averages comparison test (p = 0.05). There was a low percentage of rooting for alporquia, however, in relation to the presence of calluses, a significant difference between treatments was observed, with higher percentages in the control (70%), which could indicate a future rooting in these branches. It was also observed a significant difference in relation to the presence of live alporques at concentrations of 1500 (56.66%), 3000 mg L-1 (46.66%), and control (26.66%), which demonstrate that the species possesses difficulty in rooting. However, there was a high percentage of live cuttings in the concentration of 3000 mg L-1 (80%), 1500 mg L-1 (75%) and control (72, 5%), requiring a longer storage time in the substrate, because the species is considered to be difficult to rooting.