Propagation of Streptosolen jamesonii (Benth.) Miers by stem cutting treated with IBA in different substrates

Abstract

The mamalade shrub [Streptosolen jamesonii (Benth.) Miers] is an ornamental species with great potential of use in gardens; these plants have an intense contrast of colors between flowers and leaves and their flowering occurs in practically all the seasons of the year. This plant is propagation mainly by stem cuttings, but the propagation vegetative of this plant is still poorly known. Knowledge about auxin and substrate actuations on rooting may be useful for the cultivation and promotion of the popularization of these plants for garden ornamentation purposes. Therefore, this work aimed evaluated the effect of indolbutiric acid (IBA) and substrates on stem rooting and quality of marmalade bush plants. The experimental design was the completely randomized, in a 5x3 factorial scheme, with eight replications and one stem cut per plot. Factor A consisted of four concentrations of IBA 500; 1000; 2000 and 3000 mg L-1 and a control 0 mg L-1 (only distilled water); the B factor was constituted of substrates: vermiculite, sand and commercial substrate Plantmax®. Each herbaceous cutting was standardized by length, measuring 10 cm and six leaves. The treatment was performed submerging the base of cutting, 3 cm in length, in solution of IBA for 1 min and disposed in substrates vermiculite, sand or commercial substrate. After 30 days were evaluated the percentage of rooting and surviving of cutting, the number of roots and shoots, the length of roots and shoots; the length of roots and shoots and the fresh weight of roots and shoots were evaluated. The IBA concentrations or the substrates do not affect the rooting or survival of the cuttings, however, better quality plantlets are obtained when the cuttings are treated with 750 to 1456 mg L-1 IBA in commercial substrates where the highest number of roots and the greater development of root and new shoots.

“Growth regulators in the rooting of sun poinsettia (Euphorbia pulcherrima) Valenciana variety” / “Reguladores de crecimiento en el enraizamiento de nochebuena de sol (Euphorbia pulcherrima) variedad Valenciana”

“…Similar results were found by Amri et al (2010), who showed that the use of IBA promoted the rooting of Dalbergia melanoxylon (granadilla). Other ornamental species where IBA has been used successfully are Hibiscus rosa-sinensis L., Conocarpus erectus, Rosa caninna L., Carisa carandas L., Streptosolen jamesonii, and Solidago et al, 2020;Tanuja and Rana, 2018;Pêgo et al, 2019). IBA, a synthetic auxin, is commonly applied to various woody species for root generation because it regulates cell division, expansion, and differentiation (Frick and Strader, 2018).…”

24-Epibrasinólido (24-EBL) como inductor de enraizamiento de esquejes de arándano azul en diferentes sustratos

“…El efecto de la interacción de los factores en el enraizamiento de esquejes se observó al día 30, la mayoría de los trabajos reportaron que el enraizamiento de los esquejes de arándano se presenta en un tiempo de 55 a 60 días, con un porcentaje de éxito de 40 a 52% (Castro y Guzmán, 2013). Pego et al (2019) reportaron que algunas especies de ericácea enraízan mejor en mezcla de turba y arena río, sin embargo, con los resultados obtenidos en el presente trabajo, la mezcla de arena de río y tezontle presento buenas propiedades fisicoquímicas para el enraizamiento de arándano, esta mezcla mantiene una ventilación adecuada en el entorno de enraizamiento.…”

Enraizamento de estacas de mini-ixora (Ixora coccinea L. var. compacta) sob diferentes substratos e estimuladores de desenvolvimento radicular

“…O enraizamento de plantas ornamentais pode ser afetado por propriedades físicas do substrato, como porosidade, densidade e capacidade de retenção de água. Essas características podem ser fatores limitantes da propagação vegetativa causando restrições físicas às emissões e cultivo de raízes (PÊGO;GROSSI, 2016;PÊGO et al, 2019). O uso de substratos mais adequados para proporcionar maior enraizamento, melhor distribuição e conformação das raízes (KLEIN;COHEN;HEBBE, 2000) são essenciais na formação de mudas de qualidade superior.…”

“…Em muitas plantas ornamentais, o enraizamento é maximizado pela aplicação de auxinas, como em mamalade (Streptosolen jamesonii Benth.) (PÊGO et al, 2019), euphorbia (Euphorbia phosphorea Mart) (ROSSA et al, 2019), cróton (Codiaenum variegatum L.) e hibisco (Hibiscus rosa-sinensis L.) (BALDOTTO et al, 2015), espirradeira (Nerium oleander L.) (PIVETTA et al, 2012), hibisco (Hibiscus rosa-sinensis L.) (PIZZATTO et al, 2011), malvavisco (Malvaviscus arboreus Cav.) (LOSS et al, 2009), alamanda (Allamanda catartica L.) (LOSS et al, 2008), caliandra (Calliandra Benth.)…”