Indolebutyric acid on boxwood propagation by stem cuttings

Abstract

Buxus sempervirens L., popularly known as boxwood, is a woody shrub widely used in gardening and landscaping. One of the most important factors for B. sempervirens commercial production is its propagation. The objective of this study was to evaluate the effect of indolebutyric acid (IBA) concentrations on the adventitious rooting of semihardwood stem cuttings of the species. Branches with new shoots were collected from stock plants with approximately 17 years of growth. Stem cuttings of six centimeters in length with two leaves in the upper region were made with a straight cut at the apex and a bevel cut at the base. Cuttings bases were immersed for 10 seconds in hydroalcoholic solutions (50% v v-1) with IBA at 0, 1500, 3,000 or 6,000 mg L-1. The cuttings were evaluated at 64 and 116 days after planting. Rooting, mortality, callus formation and sprouting percentages as well as root number and root length were measured. At 64 days, no significant percentage of rooting was observed in B. sempervirens stem cuttings and sprouting and callus formation were not significantly affected by the treatments. Keeping the cuttings in the greenhouse for 116 days led to rooting rates up to a 97.5%, with no statistical difference among treatments. Root lengths and root numbers did not differ as a function of treatments. The required period for B. sempervirens stem cuttings rooting is around 116 days; IBA application does not affect rooting, survival or sprouting of B. sempervirens stem cuttings.

Vegetative Propagation of Hymenaea Courbaril L. And Apuleia Leiocarpa (Vogel) J. F. Macbr. By Mini-Cutting

“…According to Botin and Carvalho (2015), auxins are growth regulators which induce root formation in cuttings, but in some cases have little or no eff ect on species with diffi cult rooting, and may even have toxicity. Other already studied species have also shown no response to IBA in relation to cutting survival or rooting, among which we can highlight Eucalyptus grandis Hill ex Maiden (Titon et al, 2003), Campomanesia aurea O. Berg (Emer et al, 2016) and Buxus sempervirens L. (Vieira et al, 2018).…”

Produtividade da soja com coinoculação e suplementação da adubação via foliar

“…Neste sentido, supõe-se que o tempo de 45 dias para a realização da avaliação parece ter sido insuficiente para que os tratamentos expressassem suas influências sobre todas as variáveis analisadas, ainda que o efeito do produto comercial tenha começado a manifestar efeito já na primeira avaliação e consolidando-se na segunda. Resultado semelhante foi constatado por Vieira et al (2018), ao avaliarem concentrações crescentes de ácido indolbutírico (AIB) no enraizamento adventício de estacas de Buxus sempervirens L., em que nas avaliações realizadas aos 64 dias não detectaram enraizamento significativo, porém, a manutenção das estacas até o 116° dia, implicou em acréscimo de enraizamento.…”

The effects of different rooting temperatures and phytohormones on the propagation of boxwood cuttings

“…In addition, after the rooting period of 57 days, 100% rooting percentage was determined and the cuttings were removed from the rooting media. Vieira et al (2018) reported that a period of about 116 days is needed for the rooting of semi-hardwood cuttings of B. sempervirens. In our study using softwood cuttings for B. sempervirens subsp.…”