Fitorreguladores e espectros de luz na micropropagação de Oncidium baueri Lindl

Camargo, Samila Silva; Rodrigues, Daniele Brandstetter; Rodrigues, Caroline Moreira; Assis, Adriane Marinho de; Faria, Ricardo Tadeu de; Schuch, Márcia Wulff

doi:10.1590/0103-8478cr20141780

Cited by 7 publications

(5 citation statements)

References 10 publications

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“…For the variable number of roots, a similar behavior was observed, with or without the use of IBA. Camargo et al (2015) working with the in vitro multiplication of explants of Oncidium baueri, observed that in the rooting stage the obtainment of roots with adequate number and development is possible with the use of the MS growth medium with 0.1 mg L -1 IBA.…”

Section: Resultsmentioning

confidence: 99%

Quality of light and indolbutyric acid in vitro rooting of lavender

et al. 2020

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Lavender, an aromatic and medicinal plant, used in the extraction of essential oil, as an ornamental and meliferous plant, can be successfully propagated as long as the light, the nutrient medium and the growth regulators are adequate. The aim of the study was to evaluate the effect of different concentrations of indolebutyric acid (IBA) associated to distinct light spectra, on the in vitro rooting of Lavandula angustifolia. The experiment consisted in the combination of two concentrations of indolebutyric acid in the growth medium (0 and 0.1 mg L-1) and two light spectra, using cellulose acetate filters (blue and red), besides the control (without filter), totaling six treatments with four repetitions. For each repetition five explants were used. After 30 days, the variables evaluated were: survival percentage, number of buds and leaves, shoot length, number of roots, length of the longest root, shoot fresh and dry matter weight. There was a significant interaction among the indolebutyric acid concentrations and the light filters for the variables number of buds, leaves and roots and shoot length. Except for leaf number, promising results were obtained when the explants were held under red filters and with a concentration of 0 mg L-1 of indolebutyric acid in the growth medium. From these results, it can be concluded that the best in vitro rooting of Lavandula angustifolia is obtained when there is no indolebutyric acid in the growth medium associated with the use of the red filter.

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Section: Resultsmentioning

confidence: 99%

Quality of light and indolbutyric acid in vitro rooting of lavender

et al. 2020

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“…Se observó un efecto positivo de la luz en la velocidad de germinación, lo cual confirma lo que mencionan Camargo et al (2015), quienes indican que semillas con esta característica se consideran como fotoblásticas positivas. Es así que las condiciones de luz tienen un efecto sobre la velocidad de germinación (Wang & Folta, 2013).…”

Section: B Velocidad Media De Germinación (Vgm)unclassified

Efecto de la luz sobre la germinación de semillas champa (Campomanesia lineatifolia R. & P.)

Merchan¹,

Benavides

Ardila

et al. 2020

Cien. Agri.

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La champa (Campomanesia lineatifolia R. & P.) es una especie frutal de la familia Myrtaceae, con gran potencial de comercialización por el agradable sabor de sus frutos. Su propagación por semillas presenta dificultades asociadas a un bajo porcentaje de germinación y un tiempo prolongado para culminar esta etapa. Como se desconoce el efecto que pueda generar la luz en las semillas de champa, el objetivo de este estudio fue determinar el efecto de diferentes tratamientos de luz sobre la germinación de semillas champa en condiciones de laboratorio. El material vegetal fue recolectado en el municipio de Miraflores, Boyacá, Colombia. Se hizo un experimento en un diseño completamente al azar con cuatro tratamientos correspondientes a diferentes condiciones de luz: las semillas fueron sembradas en cajas Petri que se cubrieron con papel aluminio (oscuridad), papel celofán rojo, papel celofán azul y un grupo testigo sin cubierta. Cada tratamiento tuvo cuatro repeticiones, la unidad experimental estuvo compuesta de una caja Petri con 35 semillas. Se determinaron parámetros de germinación y de viabilidad a través del test de tetrazolio. Máximo porcentaje de germinación (57,85 %) y mayor velocidad de germinación (0,39 semillas germinadas/d) con el tratamiento de luz roja; respuesta contraria con las semillas en oscuridad. Las semillas recién cosechadas presentaron 93,74 % de viabilidad. Las que no germinaron obtuvieron un porcentaje representativo de semillas viables (entre el 15 y 20 %). Estos resultados permiten concluir que C. lineatifolia tiene comportamiento de fotoblastismo positivo y presenta condiciones de latencia, posiblemente fisiológica.

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“…It was reported that the treatment without BAP and concentrations above 3.5mg L -1 increased the length of explants, 11.1 and 9.7mm respectively (Figure 1b). Given the small difference reported between the absence and high concentration of this growth regulator in the length of shoots, it is justified the use of culture media without BAP, permitting a reduction in costs (CAMARGO et al, 2015).…”

Section: Thementioning

confidence: 99%

Micropropagation of the new apple rootstock ‘G. 814’

et al. 2017

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International breeding programs launched new genetic material of apple rootstocks that in addition to precocity and great yield are resistant to major diseases and soil pests encountered in the largest apple producing regions in Brazil. Given this, there is a necessity for vegetative propagation of these materials for study and possible replacement of existing rootstocks. The objective was to adapt a micropropagation protocol for new apple rootstock ‘G. 814’. In the multiplication phase were evaluated BAP concentrations: 0; 0.5; 1; 2 and 4mg L-1 and in the rooting phase were evaluated IBA concentrations: 0; 0.25; 0.50; 1; 1.5 and 2.5mg L-1. These new results demonstrated that this new rootstock selection can be propagated with this tissue culture adapted protocol. For the successful in vitro propagation of apple rootstock ‘G. 814’ it is indicated the use of 1mg L-1 BAP at multiplication phase and 1.5mg L-1 IBA at rooting phase.

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Fitorreguladores e espectros de luz na micropropagação de Oncidium baueri Lindl

Abstract: RESUMO Considerando que algumas espécies de orquídeas estão ameaçadas de extinção, a micropropagação é uma alternativa para a produção de um grande número de mudas

Cited by 7 publications

References 10 publications

Quality of light and indolbutyric acid in vitro rooting of lavender

Quality of light and indolbutyric acid in vitro rooting of lavender

Efecto de la luz sobre la germinación de semillas champa (Campomanesia lineatifolia R. & P.)

Micropropagation of the new apple rootstock ‘G. 814’

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