Época de coleta, ontogenia da planta matriz e concentração de AIB na propagação de Guabirobeira por mini-estaquia

Abstract

The guabirobeira (Campomanesia xanthocarpa) representative of the family Myrtaceae, presents numerous uses, in the food industry, pharmacological, and cosmetics. Due to being fruit be rich in vitamin C, minerals and phenolic compounds. However, in order for the species to be widely used, uniform orchards with superior genetic potential should be obtained through quality seedlings. Currently, the most used form of propagation for this species is seminiferous, but this method presents as a disadvantage the lack of uniformity of the genetic material, which may imply in the decrease of the quality of the product. Thus a solution is the asexual propagation that maintains desirable characteristics of the matrix plant, good quality, fast obtaining, low cost in the production. In this sense the mini-cutting comes as a new form of propagation that has been showing good results for species of the same family. The objective of this work is to obtain mini - skates of guabirobeira by analyzing the seasonal variation, different concentrations of IBA, and ontogeny. The experiment was conducted at the Universidade Tecnológica Federal do Paraná - Câmpus Dois Vizinhos, Brazil, and the experimental design was completely randomized in factorial 2x5x5, with 2 ages of the mother plant (young plants and adult plants), 5 concentrations of AIB (0, 2000 , 4000, 6000 and 8000 mg.L-1.), And 5 collection seasons (April and June 2015, and, February, April, August 2016), with four replications, and for the month of April / 20 and 20/206 were obtained for ministays for both ages, for June / 2015 obtained 7 mini-cuttings for young plants and 15 for adult plants. As for the collection season of August / 2016, 8 mini-cuttings of young plants and 15 of adult plants were made. Minicers of 6 cm were made and they were immersed in IBA for 15 seconds. The evaluations were performed every 120 days considering the presence of callus (%), percentage of live and rooted cuttings, number and length of roots and primary shoots. After the data were analyzed by the normality test of Lilliefors, and submitted to analysis of variance and later to the regression test for the quantitative factor and comparison of means of Duncan (p = 0.05) for the qualitative. It was obtained low rhizogenesis in guabirobeira mini-cuttings, with 5.9% rooting in mini-strokes of young plants for the April 2015 season, and other treatments should be tested. The collection of young material for use as a mini-stake was used as an indication.