Influência de ácido indolbutírico no enraizamento de estacas semilenhosas de Campomanesia aurea

Abstract

Influence of indolebutyric acid in the rooting of Campomanesia aurea semihardwood cuttings 94Ornamental Horticulture CAMPINAS-SP | V. ABSTRACT Campomanesia aurea (O. Berg) is a species native to southern Brazil, naturally occurring from the state of São Paulo to Rio Grande do Sul, and presenting a great ornamental potential. The objective was to verify the rooting of semihardwood cuttings of Campomanesia aurea using indolebutyric acid (IBA) doses. The cuttings were collected in the municipality of Barão do Triunfo, Rio Grande do Sul State, in December 2014. The cutting base was immersed in concentrations of zero (control), 2,000, 4,000, 6,000 and 8,000 mg L -1 of IBA, subsequently established in a carbonized rice husk substrate and placed in a protected environment with an intermittent misting system. At 111 days after installation, dead and rooted cuttings, leaf retention, callus formation, root volume, root and shoot dry matter were evaluated. The experimental design was completely randomized with four replications with 20 cuttings. Data were submitted to analysis of variance and regression. No statistical differences were found for any of the evaluations. An average rooting was observed in 28% of cuttings and callus formation was observed in 48% of cuttings. Root average volume per cutting was 0.15 mL, root dry mass was 0.01 g, and shoot dry mass was 0.28 g. There was a negative correlation between leaf retention and mortality of cuttings. It is concluded that the production of C. aurea by cutting is viable, and that there was no positive response to the application of IBA with the conditions under which the experiment was developed.

Indolebutyric acid on boxwood propagation by stem cuttings

“…Similarly as observed in this study, the use of IBA did not affect the rooting of Jasminum polyanthum (SILVA et al, 2012), Drimys brasiliensis (ZEM et al, 2015), Campomanesia aurea O. Berg (EMER et al, 2016) and Varronia curassavica Jacq (BISCHOFF et al, 2017).…”

Nitrogen fertilization for ministrains of Campomanesia aurea O. Berg and its influence on productivity and rooting of minicuttings at different seasons of the year

“…High temperatures promote a faster sprout growth and a greater rooting (Hartmann et al, 2011). The results of rooting obtained in this study were higher than those found in previous experiments for cuttings of C. aurea collected directly from the field: 28, 20, 8 and 25%, in the summer, autumn, winter and spring, respectively (Emer et al, 2016;Emer et al, 2018). Among the factors that may have contributed to the results obtained by minicutting, there are better nutrition of matrix plants and the juvenile state of the propagules.…”

“…Previous research has shown that cuttings of C. aurea collected directly from the field present a low rooting (Emer et al, 2016;Emer et al, 2018). Therefore, the production of seedlings by cuttings collected from minigardens might be an alternative for the vegetative propagation of this species, since there is a control of nutritional management in matrix plants, besides obtaining juvenile material, which is more suitable to rooting.…”

Rooting of apical cuttings of Angelonia integerrima Sprengel: concentrations of indole-3-butyric acid and substrates

“…In this work, it did not present differences for the different concentrations of IBA, but it is important to emphasize that the regulators can also influence the quality of the root system (FACHINELLO et al, 2005), which will have a direct relation with seedling development, as well as with their survival at transplant (LIMA and OHASHI, 2016), consequently presenting faster and more vigorous growth (REIS et al, 2000). Similar results were obtained in the rooting of Campomanesia aurea O. Berg cuttings, where IBA also had no influence on root system quality (EMER et al, 2016). Moreover, in cuttings of Mikania micrantha Kunth (FERRIANI et al, 2007) and Jasminum mesnyi Hanceos (ALTHAUS et al, 2007), the authors found that the use of synthetic auxin increased the length of the roots formed, influencing their quality.…”