Cytokinins induce the development of Campomanesia pubescens root cuttings

The gabirobeira (Campomanesia pubescens) is a species native to Brazilian Cerrado with great potential but is threatened to extinction and remains wild. The nursery plant production is an alternative to solve those problems and the use of plant growth regulators can support vegetative propagation. The objective of this work was to evaluate the effect of cytokinin concentrations on the vegetative propagation of C. pubescens root cuttings. The concentrations of the cytokinin 6-Benzylaminopurine were: 0.0 (Control), 1.0; 2.0 and 4.0 mg L-1 diluted in NaOH solution (6 mol L-1). The cuttings with standard size of 5 cm were dipped in the concentrations for 15 seconds and transplanted in bags containing the substrate Bioplant. After 140 days the number of shoots, length of the shoots, number of leaves, length of the leaves, the diameter of the main stem, the diameter of the main root, the total number of roots, length of the main root, total fresh matter and total dry matter, were evaluated. The experiment was conducted in a completely randomized design, with fifteen replicates per treatment. The data were submitted to analysis of variance and the effects of the concentrations tested and adjusted by regression equations. The lower concentrations of cytokinin were beneficial to the development of the cuttings, while higher concentrations inhibited their development

Desarrollo y morfología de la raíz del maracuyá en diferentes substratos

1 recurso en línea (páginas 514-520).Entre los factores que contribuyen para un correcto desarrollo inicial de las plantas, está el sustrato utilizado, por tanto, el objetivo del presente estudio fue evaluar el efecto del sustrato en la formación inicial y morfología de las raíces de dos especies de maracuyá. El experimento fue realizado en vivero con polisombra de interceptación luminosa (60%), en la Universidad Federal de Goiás (UFG), Regional Jataí, Brasil. Los materiales utilizados fueron maracuyá (Passiflora edulis f. flavicarpa) y el cultivar FB 200 (Flora Brasil). Se utilizaron semillas de frutos recolectados del huerto experimental de la UFG. Se sembraron en tres tipos de sustratos: Suelo I (mezcla de 2 partes de suelo + 1 parte de gallinaza + 1 parte de arena), Suelo II (suelo de barranco) y Bioplant®; se utilizó bolsas perforadas para plántulas con capacidad de 1,5 L. El diseño experimental utilizado fue completamente aleatorio con seis tratamientos, ocho repeticiones y cuatro plántulas por parcela. Después de 30 días de siembra, se evaluó: peso fresco de la raíz, peso seco de raíz y morfología de la raíz. El sustrato tuvo efecto en el desarrollo inicial de las plantas de maracuyá, donde se obtuvo los mejores resultados con Bioplant®. Este sustrato sobresalió en todas las características evaluadas mostrando su potencialidad en la propagación de esta especie.Among the factors that contribute to better initial development of plants, it is the substrate used. Therefore, this study aimed to evaluate the effect of substrate in initial formation and morphology of the roots of two species of passion fruits. The analyses were done in the nursery of the Federal University of Goiás (UFG), Regional Jataí, Brazil, with a light interception of 60%. The material used were seeds of yellow passion fruit (Passiflora edulis f. flavicarpa) and the cultivar FB 200 (Flora Brasil), harvested in the UFG experimental field. They were sown in three types of substrates: Soil I (mixture of soil, chicken manure and sand in a ratio of 2:1:1 by volume), soil II (steep bank), and Bioplant®, using for plants perforated bags with a capacity of 1.5 L. The experimental design was a completely randomized design with six treatments, eight replications and four plants per plot. After 30 days of sowing, fresh matter of root, root dry matter and morphology were evaluated. The substrate affected the initial development of yellow passion fruit, obtaining the best results with Bioplant®, showing as promising for the development of all the evaluated characteristics.Bibliografía: página 52