Por favor, use este identificador para citar o enlazar este ítem: http://www.dspace.uce.edu.ec/handle/25000/14665
Título : An in-depth characterization of the entomopathogenic strain bacillus pumilus 15.1 reveals that it produces inclusion bodies similar to the parasporal crystals of bacillus thuringiensis
Autor : García Ramón, Diana
Molina, Alfonso
Osuna, Antonio
Vílchez, Susana
Palabras clave : BACTERIAS ENTOMOPATÓGENAS
INCLUSIONES DE CRISTAL
RESISTENCIA UV
BACILLUS PUMILUS
Fecha de publicación : 2016
Editorial : Berlín: Springer
Citación : Molina, Alfonso y otros (enero, 2016). An in-depth characterization of the entomopathogenic strain bacillus pumilus 15.1 reveals that it produces inclusion bodies similar to the parasporal crystals of bacillus thuringiensis. Applied Microbiology and Biotechnology, 1-18
Resumen : In the present work, the local isolate Bacillus pumilus 15.1 has been morphologically and biochemically characterized in order to gain a better understanding of this novel entomopathogenic strain active against Ceratitis capitata. This strain could represent an interesting biothechnological tool for the control of this pest. Here, we report on its nutrient preferences, extracellular enzyme production, motility mechanism, biofilm production, antibiotic suceptibility, natural resistance to chemical and physical insults, and morphology of the vegetative cells and spores. The pathogen was found to be β-hemolytic and susceptible to penicillin, ampicillin, chloramphenicol, gentamicin, kanamycin, rifampicin, tetracycline, and streptomycin. We also report a series of biocide, thermal, and UV treatments that reduce the viability of B. pumilus 15.1 by several orders of magnitude. Heat and chemical treatments kill at least 99.9 % of vegetative cells, but spores were much more resistant. Bleach was the only chemical that was able to completely eliminate B. pumilus 15.1 spores. Compared to the B. subtilis 168 spores, B. pumilus 15.1 spores were between 2.67 and 350 times more resistant to UV radiation while the vegetative cells of B. pumilus 15.1 were almost up to 3 orders of magnitude more resistant than the model strain. We performed electron microscopy for morphological characterization, and we observed geometric structures resembling the parasporal crystal inclusions synthesized by Bacillus thuringiensis. Some of the results obtained here such as the parasporal inclusion bodies produced by B. pumilus 15.1 could potentially represent virulence factors of this novel and potentially interesting strain
URI : http://www.dspace.uce.edu.ec/handle/25000/14665
Aparece en las colecciones: Artículos Indexados - IM



Los ítems de DSpace están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.