Communications in Plant Sciences, vol 9, p. 41-45, 2019 (2019007)
Effect of exogenous indolbutiric acid (IBA) applications and cuttings collection times on rooting capacity of sweet tamarind
Antonio Flávio Arruda Ferreira*, Marcela Sant’anna Cordeiro da Silva, Laís Naiara Honorato Monteiro, Mariane Jerônimo Forte, Glaucia Amorim Faria, Maria Gabriela Fontanetti Rodrigues and Aparecida Conceição Boliani
*Correspondence to: email@example.com
Abstract: Considering its adaptation to tropical countries, sweet tamarind (Tamarindus indica L., Fabaceae) has been gaining space in the food and pharmaceutical industry due to its nutraceutical richness. The lack of research on the propagation of non-traditional tropical fruits has been a barrier to the production of large-scale seedlings and to the availability of products in the food and pharmaceutical markets. Thus, the objective of this experiment was to evaluate the influence of collection periods and exogenous indolbutiric acid (IBA) concentrations on rooting of softwood, semi-hardwood and hardwood sweet tamarind cuttings, aiming the production of seedlings. For this, cuttings with 18 cm length were collected in winter and spring, being planted in polyethylene trays filled with medium texture vermiculite. The experiment was conducted in a greenhouse of Pad&Fan type with temperature and controlled humidity. The experimental design was completely randomized in a factorial design (2 collection times x 3 types of cuttings x 5 concentrations of IBA) with four replicates of 10 cuttings. After 90 days, the following variables were evaluated: the percentage of rooted cuttings and dead cuttings; root number; length of the largest root (cm); and shoot number. It was observed that soft-wood cuttings had a higher rhizogenic capacity, influenced by the collection season, with winter being the best time. The highest percentage of dead cuttings was observed in semi-hardwood and hardwood cuttings, both when collected in winter and in spring. The number of roots in soft-wood cuttings was higher in the 1,500 mg kg-1 concentration of exogenous IBA and when collected in winter this material also showed a higher number of shoots. It can be concluded that sweet tamarind softwood cuttings harvested in winter and treated with 1,500 mg kg-1 of exogenous IBA support the percentage of rooted cuttings, number of roots and shoots, showing a better rhizogenic capacity.
The use of 1,500 mg kg-1 of exogenous IBA favors the rooting capacity of sweet tamarind softwood cuttings collected in the winter season.
Keywords: Tamarindus indica L., Propagating material, Propagation, Tropical fruit. (more…)