Enraizamento de estacas de Melaleuca alternifolia submetidas a diferentes reguladores vegetais

Abstract

ResumoA Melaleuca alternifolia é uma árvore da família Myrtaceae, de grande importância medicinal. Seu óleo essencial é muito utilizado tanto na medicina humana quanto na medicina veterinária, tendo grande poder antiséptico. É uma planta de difícil enraizamento no processo de estaquia. Assim, o presente trabalho teve como objetivo avaliar a eficiência de diferentes concentrações de ANA e AIB, no enraizamento de estacas de M. alternifolia. Foram utilizadas estacas com 10 cm de comprimento, submetidas ao tratamento para enraizamento com dois reguladores vegetais ANA e AIB, nas seguintes concentrações: 0 (testemunha); 1000; 2000 e 4000 mg L -1 . Aos 97 dias foram avaliados a porcentagem de estacas enraizadas, vivas e mortas, o comprimento, o volume e a massa seca de raízes. O regulador vegetal ANA na concentração de 4000 mg L -1 demonstrou ser fitotóxico para as estacas de melaleuca e o uso de AIB em relação ao ANA, na concentração de 4000 mg L -1 , proporcionou maior porcentagem de estacas enraizadas e maior comprimento radicial. Palavras-chave: Myrtaceae, estaquia, AIB; ANA AbstractThe Melaleuca alternifolia is a Myrtaceae tree of great medicinal importance. Its essential oil is widely used both in human and in veterinary medicine, having great antiseptic power. It is a difficult plant in the process of rooting cuttings. This study aimed to evaluate the efficacy of different concentrations of NAA and IBA on the rooting of M. alternifolia. Melaleuca cuttings with 10 cm in length were submitted to treatments with two regulators, NAA and IBA, in the following concentrations: 0 (control), 1000, 2000 and 4000 mg L -1 . Evaluation occurred at 97 days throughout the live and dead cuttings rooted, medium length, volume and mass of roots. The growth regulator NAA at a concentration of 4000 mg L -1 showed to be phytotoxic to the cuttings of melaleuca; the use of IBA in comparable with NAA at concentration of 4000 mg L -1 provided a higher percentage of rooting and root length increases.

Cutting from Campomanesia aurea O. Berg (Myrtaceae): The collection time of propagules and the effects of auxin

“…Applying IBA in cuttings from a mini garden of pitanga trees formed by seedlings also did not result in greater rooting (Peña et al, 2015). The same results have been observed in cuttings from Malaleuca trees (Melaleuca alternifolia) (Silva et al, 2012), guava trees (Psidium guajava) (Colombo et al, 2008) and Myrceugenia exsucca (Vidal et al, 2010).…”

Effect of ethephon and indolebutyric acid on yellow mombin propagation via cutting1

“…These positive results for yellow mombin rooting demonstrate the effectiveness of IBA in increasing root volume and length. As such, the treatment with IBA stimulates rooting and enables high-quality cuttings, since a quality root system is essential for the establishment of seedlings in the field and adequate plant development (Silva et al 2012).…”

USE OF RENEWABLE SUBSTRATES FOR EX VITRO PRODUCTION OF Melaleuca alternifolia CHEEL CLONAL PLANTS BY MINI-CUTTINGS TECHNIQUE

“…These results indicate the viability of the minicuttings technique on M. alternifolia rooting, with greater results (91.7%) than those achieved in other researches which used adult propagules (12.3% to 52.5%) (OLIVEIRA et al, 2012b;SILVA et al, 2012b;STUEPP et al, 2013). It has also shown better results in comparison with the study that used cuttings from epicormic shoots (18.0% to 74.0%), a material with greater juvenility collated to the shoots of that year.…”

“…Several studies have evaluated the propagation of M. alternifolia in different substrates, plant growth regulators and types of mini-cuttings (OLIVEIRA et al, 2012a;SILVA et al, 2012b;STUEPP et al, 2013). However, there's no system capable of producing M. alternifolia high genetic quality plants at any time of the year.…”