ROOTING OF MINICUTTINGS OF Castanea sativa Mill. HYBRID CLONES

  • Dantas Â
  • Majada J
  • Dantas F
  • et al.
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Abstract

ABSTRACT The objective of this study was to evaluate the effect of the growth regulator indole butyric acid (IBA) on the rooting of mini-cuttings of Castanea crenata x C. sativa hybrid clones. Minicuttings were left to root for 60 days in an acclimatized greenhouse and then transferred to a shade house for a further 30 days. The experiment was a random block design with a double factorial arrangement consisting of five IBA concentrations (0, 2,500, 5,000, 7,500 and 10,000 mg L-1) and five clones, with three repetitions, composed of eight minicuttings per repetition. The use of IBA significantly affected the rooting and survival of the mini-cuttings, and good rates were achieved. However, at each IBA concentration we found significant differences between clones, thus suggesting that the conditions of the process of mini-cutting propagation should be specifically adapted to each particular clone.RESUMO O objetivo deste estudo foi avaliar o efeito do regulador de crescimento ácido indolbutírico (AIB) no enraizamento de miniestacas de clones híbridos de Castanea crenata x C. sativa. O enraizamento das miniestacas foi conduzido durante 60 dias em casa de vegetação climatizada e, em seguida, as mudas foram transferidas para casa de sombra, permanecendo por 30 dias. O delineamento experimental utilizado foi em blocos ao acaso, em arranjo fatorial duplo, constituído de cinco concentrações de AIB (0, 2.500, 5.000, 7.500 e 10.000 mg L-1) e cinco clones, com três repetições, compostas de parcelas com oito miniestacas por repetição. O uso de AIB afeta significativamente ao enraizamento e sobrevivência das miniestacas de castanheiro alcançando índices satisfatórios, entretanto se observa que existem diferenças significativas no comportamento dos clones para a mesma dose de AIB, pelo qual se sugerem modificações no processo da propagação adaptando a técnica para cada clone em particular.

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Dantas, Â. K., Majada, J., Dantas, F. K., Delatorre, C., Granda, V., Vallejo, P., & Feito, I. (2016). ROOTING OF MINICUTTINGS OF Castanea sativa Mill. HYBRID CLONES. Revista Árvore, 40(3), 465–475. https://doi.org/10.1590/0100-67622016000300010

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