Molecular Identification of Microorganisms Associated to the Rhizosphere of Vanilla Plants in Colombia
subject: ADNr, PCR, PGPR, Vanilla planifolia, filogenia
description: The cultivation of vanilla (Vanilla planifolia) is highly promising in Colombia, but more research is needed on its agronomical management and beneficial microorganisms that grow associated to its rhizosphere, on which the plant depends for its nutrition and growth. This study involved the identification of microorganisms associated to the rhizosphere of vanilla plants in a crop located in Sopetrán, Colombia. The microbes were isolated in selective media for functional groups such as cellulolytic, proteolytic, inorganic and organic phosphate (phytate) solubilizers, and asymbiotic nitrogen fixing bacteria. After isolation and purification, 109 microbial isolates were obtained. DNA was extracted from 52 selected isolates for molecular identification based on ITS and 16S rDNA sequencing, for fungi and bacteria, respectively. The diversity of rhizosphere microorganisms found was significant. Bacteria such as Bacillus megaterium, Pseudomonas koreensis and Acinetobacter sp., and the fungus Plectosphaerella sp., may have a high potential to be used as biofertilizers to improve vanilla plant nutrition and growth. IDENTIFICACIÓN MOLECULAR DE MICROORGANISMOS ASOCIADOS A LA RIZOSFERA DE PLANTAS DE VAINILLA EN COLOMBIA El cultivo de vainilla es altamente promisorio en Colombia, pero se requiere mayor conocimiento de su manejo agronómico y de los microorganismos que crecen asociados a su rizosfera, de los cuales depende esta planta para su nutrición y crecimiento. En este trabajo se realizaron aislamientos de microorganismos de la rizosfera de plantas de vainilla en un cultivo piloto ubicado en el municipio de Sopetrán (Antioquia, Colombia). Los microorganismos se aislaron en medios selectivos de crecimiento para evaluar su capacidad para descomponer celulosa, proteínas, solubilizar fosfato inorgánico y orgánico (fitato) y fijar nitrógeno en forma asimbiótica. Una vez aislados y purificados, se obtuvieron un total de 109 aislamientos, de los cuales se seleccionaron 52 morfotipos…
creator: Mauricio Alejandro Marín Montoya, Nelson Walter Osorio Vega, Claudia Lucía Álvarez López
source: Acta Biológica Colombiana
publisher: Universidad Nacional de Colombia
date: 2013
relation: https://revistas.unal.edu.co/index.php/actabiol/article/view/37216
coverage: Biology (General)