O jamboleiro propaga-se geralmente por sementes, sendo este método inviável, devido aos problemas de segregação genética e pelo longo período que as plantas levam para alcançar a idade reprodutiva. Desta forma, o desenvolvimento de protocolo para propagação vegetativa desta espécie por meio da alporquia se torna alternativa importante a ser testada. Assim, o trabalho teve por objetivo analisar o uso de algodão, época de realização dos alporques, concentração de auxina e tipo de embalagem para a propagação de jamboleiro [Syzygium cumini (L.) Skeels] por alporquia. Para tanto, utilizou-se delineamento experimental em blocos ao acaso, esquema fatorial 4 x 3 x 3 x 2 (época do ano x concentração de AIB x tipo de revestimento x presença ou ausência de algodão), com três repetições com cinco alporques. Após 180 dias da implantação do experimento, seguindo cada época de realização, foram mensuradas a porcentagem de calos nos ramos alporcados, o número e comprimento médio das três maiores raízes (cm) e a percentagem de enraizamento. Verificou-se que a estação do ano teve influência significativa no enraizamento dos alporques com as maiores médias no outono e inverno (33,22% e 31,34%, respectivamente). A alporquia em jamboleiro deve ser feita aplicando-se AIB a 4000 mg L-1 com uso do algodão e papel-alumínio como revestimento nas estações do outono e inverno.
The aim of the study was to test different concentrations of indole-3-butyric acid and Benzylaminopurine in the jambolanpropagation by cuttings. The woody cuttings were obtained from plants approximately 15 years old and standardized with 12 cm in length, approximately 1.0 cm in diameter and two superficial lesions at the basal part, on opposite sides, with a portion of thebark being removed with about 0.5 cm wide by 2.5 cm in length, with apex cut in diagonal. The experimental design was completely randomized with factorial arrangement 3 × 3 *Indole-3-butyric acid (IBA) × Benzylaminopurine (BAP)+, with 4 replications, considering the use of 20 cuttingsper plot. The IBAconcentrations used were 0, 5000 and 10.000mg L-1and BAP 0, 250 and 500 mg L-1. The applications of the solutions were by immersion of 10 seconds in the base of the cuttings and conditioned in sand bed. After 120 days the characteristics of rooting and cuttings with calluses, number and length of primary shoots, number and length of roots were analyzed. The rooting percentage presented the highest result using 5,000 mg L-1of indole-3-butyric acid. However,the use of 10.000mg L-1of IBA provided a lower percentage of rooting, besides a higher number of dead cuttings. The use of Benzylaminopurine was not satisfactory for the rooting of jambolancuttings, since it did not provide increase in the rooting, thenumber of roots and the average size of the roots. The use of up to 5000 mg L-1of IBA without application of BAP was the most suitable for propagation of jambolanby cutting.
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