ORIGIN OF EPICORMIC SPROUTS AND USE OF INDOLEBUTYRIC ACID IN ROOTING OF Vochysia bifalcata Warm.

• Autor(a) principal: Rickli, Helena Cristina
• Data de Publicação: 2015
• Outros Autores: Bona, Cleusa, Wendling, Ivar, Koehler, Henrique Soares, Zuffellato-Ribas, Katia Christina
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Ciência Florestal (Online)
• Texto Completo: https://periodicos.ufsm.br/cienciaflorestal/article/view/18457
• topic: Vochysiaceae; cutting; rejuvenation; auxin.; Vochysiaceae; estaquia; rejuvenescimento; auxina.

http://dx.doi.org/10.5902/1980509818457 Guaricica (Vochysia bifalcata) is a native species of the coastal region of Paraná, Santa Catarina, São Paulo, Rio de Janeiro and Minas Gerais states, with great ecological importance due its ability to regenerate degraded areas. However, little information exists about its ability to sexual or asexual propagation. One of the causes of cuttings low rooting is the maturation of collected tissues. Thus, this study aimed to evaluate different epicormic sprout sources (from stump and from bend of stem) and the application of indolebutyric acid (IBA) in rooting cuttings of Vochysia bifalcata. Two types of cuttings were used (of stump and of bend of stem) and were treated with two concentrations of IBA (0 and 1000 mg L-1), and later, the cuttings were kept in a greenhouse for 60 days. Anatomical analysis of the base on each type of cuttings demonstrated that the presence of fibers in the cortical region of the stem cuttings of stump did not constitute an anatomical barrier to issue adventitious roots, because they had higher rooting capacity (81%), a higher number of roots per cuttings (8,0) and increased root length (2,0 cm) compared to those of bend of stem, that showed poorer results as lower rooting percentage (31%), lower number of roots per cutting (3,3) and lower root length (0,7 cm). It is concluded that the use of basal shoots obtained by regrowth of stump provides better rooting than the bend of stem, not requiring the application of IBA as rooting induction treatment for this type of material.