ROOTING OF Inga edulis Mart. (LEGUMINOSAE-MIMOSOIDEAE) MINI-CUTTINGS

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.

Mini-cutting of Plathymenia reticulata benth. with ministumps conducted in suspended seedbed and tubes

“…However, those same authors performed assessment 150 days after staking. These values are also lower than those found for other tropical forest species, such as Inga edulis, which reached 9.3 and 13.7 roots without and with the application of growth regulators (AIB: 8000 mg.kg -1 ), respectively, 45 days after staking (Berude et al, 2019), Piptocarpha angustifolia mini-cuttings, showing 6.3 roots/mini-cuttings, collected in winter (Ferriani et al, 2011), and Cabralea canjerana mini-cuttings, which presented averages of 2.20 to 6.46 roots/mini-cuttings at the same collection time 60 days after staking . However, the values obtained for this variable were higher than those obtained for Eugenia involucrata minicuttings, which had 0.95 roots/mini-cuttings 120 days after staking (Chiele, 2016), and Aniba Rosaeodora mini-cuttings, which presented 2.08 roots / mini-cuttings 90 days after staking (Menezes et al, 2018).…”

“…and Toona ciliata seedlings (Bela Vista Florestal, 2020). However, the results of various studies indicate the technique is feasible for other species, including Cedrela fisillis , Ilex paraguariensis (Wendling et al, 2007), Erythrina falcata (Cunha et al, 2008), Calophyllum brasiliense (Kalil Filho et al, 2010;Silva et al, 2010;Santos, 2013;Ciriello and Mori, 2015), Cariniana legalis (Gatti et al, 2011), Anadenanthera colubrina (Dias et al, 2012), Handroanthus heptaphyllus Oliveira et al, 2016), Lecythis pisonis (Santana, 2017), Inga edulis (Berude et al, 2019), and Cabralea canjerana (Burin et al, 2018a and2018b).…”