RESUMENEl objetivo de este trabajo fue optimizar la germinación de semillas botánicas en condiciones in vitro y establecer un medio de cultivo que nos permita la multiplicación y enraizamiento de plántulas a partir de segmentos nodales. La metodología comprendió la desinfección de las semillas botánicas in vitro, para lo cual fueron sumergidas en alcohol 70% durante 60 segundos y enjuagadas 3 veces con agua destilada estéril, luego fueron sumergidas en NaOCl 1.5% durante 10 y 15 minutos por cada tratamiento y enjuagadas 3 veces con agua destilada estéril. Los segmentos nodales obtenidos de las plantas que germinaron a partir de semillas botánicas en condiciones in vitro fueron sub cultivadas en medio de cultivo MS suplementado con diferentes -1 -1 concentraciones de reguladores de crecimiento: BAP (0.5, 1 y 2 mg.L ) y ANA (0, 0.1 y 0.25 mg.L ). Los resultados muestran que las semillas botánicas tratadas con alcohol 70% (60 segundos) y NaOCl 1.5% (15 minutos) presentaron menor porcentaje de contaminación (42.22%) y un mayor porcentaje de germinación (76%). En el caso de segmentos nodales, se obtuvieron mejores resultados en aquellos cultivados en MS -1 -1 suplementado con 0.5 mg.L de BAP y 0.1 mg.L de ANA (plantas de 4.82 cm con un coeficiente de multiplicación de 2.87). Con este mismo medio se obtuvo un 100% de enraizamiento con un promedio 8.13 raíces por planta a las 5 semanas de individualizada, permitiendo obtener semilla vegetativa de calidad.PALABRAS CLAVE: Cedrela odorata, in vitro, reguladores de crecimiento, segmentos nodales, enraizamiento. In vitro PROPAGATION OF NODAL SEGMENTS OF CEDAR (Cedrela odorata L.) OBTAINED FROM BOTANICAL SEEDS ABSTRACTThe objective of this study was to optimize the in vitro germination of botanical seeds and establish the conditions and cultivation medium for its multiplication and rooting from nodal segments. For the disinfection of botanical seeds in the in vitro establishment, these were immersed in 70% alcohol for 60 seconds and rinsed 3 times with sterile distilled water and then they were immersed in 1.5% NaOCl for 10 and 15 minutes per treatment and rinsed 3 times with sterile distilled water. The nodal segments obtained from the plants that germinated from botanical seeds in in vitro conditions were sub cultivated on MS medium supplemented with different concentrations of growth regulators: BAP (0.5, 1 and 2 mg.L-1) and NAA (0, 0.1 and 0.25 mg.L-1). Botanical seeds treated with alcohol 70% (60 seconds) and 1.5% NaOCl (15 minutes) had lower contamination rate (42.22%) and a higher percentage of germination (76%). The MS medium supplemented with 0.5 mg.L-1 of BAP and 0.1 mg L-1 of ANA allowed the development of seedlings of 4.82 cm with a multiplication factor of 2.87. Furthermore using the same culture medium was obtained 100% rooting with 8.13 roots per plant at 5 weeks of individualized, obtaining high quality vegetative seeds.
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