Abstract
Seeds of the species Inga edulis are recalcitrant and lose viability quickly, which restricts seedling production at only a certain time of the year. Thus, this study aimed to analyze the potential of mini-cutting and the influence of different indole-3-butyric acid (IBA) concentrations on the vegetative propagation of Inga edulis. The vegetative material was collected from juvenile plants from a clonal mini-garden. The experiment was carried out in a completely randomized design, with five replications and each experimental unit with eight cuttings. Treatments consisted of different IBA concentrations (0, 1000, 2000, 4000, and 8000 mg kg−1). The percentage of live and rooted mini-cuttings, number of roots emitted from the base, longest root length, total number of roots, fine root length, total root length, root surface area, weighted average root diameter, root volume, shoot dry matter, root dry matter, total dry matter, specific root length, specific root surface area, and root density were analyzed after 45 days in a greenhouse. All Inga edulis mini-cuttings survived, and rooting was over 85%. IBA concentrations had no significant effect on most of the analyzed variables. However, exogenous auxin concentration between 2000 and 4636.96 mg kg−1 provided mini-cuttings with a higher number of roots, surface area, and root volume. Rooting of juvenile Inga edulis mini-cuttings may occur without the use of IBA.
Highlights
Faced with increasing legal requirements and worsening environmental problems, the demand for forestry information regarding the multiplication of forest species of the Brazilian flora has intensified
The following variables were determined: percentages survival (S%) and rooting (R%) of mini-cuttings, number of roots emitted from the base (NRB), and longest root length of mini-cuttings (RL, cm), using a millimeter ruler
According to the results of the analysis of variance of the variables related to root system growth of I edulis mini-cuttings, a significant difference (p ≤ 0.05) was observed in the indol-3butyric concentrations for number of roots emitted from the base (NRB), root surface area (SA), and root volume (RV)
Summary
Faced with increasing legal requirements and worsening environmental problems, the demand for forestry information regarding the multiplication of forest species of the Brazilian flora has intensified. (Leguminosae-Mimosoideae) is a widespread fruit tree in Brazil and South and Central America It has the potential for reforestation due to its rusticity to adverse environmental conditions and biological nitrogen fixation capacity. I. edulis still has the potential for the management of non-timber products, as its leaves have anti-inflammatory properties, especially flavonoids (DIAS et al, 2010; SILVA et al, 2013). This versatility makes I. edulis interesting for use in forest restoration programs and commercial
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