2 research outputs found
Stimulation of biofilm formation by hydrocarbon degrading strains in the presence of squamocin
Previous studies have shown that annonaceous acetogenins (ACGs) stimulates biofilm formation in a P. aeruginosa strain of clinical origin. ACG squamocin is structurally related to the Îł-lactones, a family of bacterial autoinducers that play an essential role in the quorum sensing mechanism to coordinate the biofilm maturation. In this work, 37 polycyclic aromatic hydrocarbon degrading strains were tested for their attachment capability and biofilm development on polystyrene microplates using squamocin as a biofilm inducer. Out of the 37 strains tested, 22% showed natural formation of bacterial biofilms that increased in the presence of squamocin, in some cases up to 40%. In the remaining 12 strains over 60% showed an increase in biofilm production and were therefore selected for future studies.Fil: Rodriguez, Analia. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - Tucumán. Planta Piloto de Procesos Industriales MicrobiolĂłgicos; Argentina. Universidad Nacional de Tucumán. Facultad de BioquĂmica, QuĂmica y Farmacia; ArgentinaFil: Riva Mercadal, Juan Pablo. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - Tucumán. Planta Piloto de Procesos Industriales MicrobiolĂłgicos; ArgentinaFil: Cartagena, Elena. Universidad Nacional de Tucumán. Facultad de BioquĂmica, QuĂmica y Farmacia; ArgentinaFil: Ferrero, Marcela Alejandra. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - Tucumán. Planta Piloto de Procesos Industriales MicrobiolĂłgicos; ArgentinaFil: Neske, Adriana. Universidad Nacional de Tucumán. Facultad de BioquĂmica, QuĂmica y Farmacia; ArgentinaFil: Bardon, Alicia del Valle. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - Tucumán. Instituto de QuĂmica del Noroeste. Universidad Nacional de Tucumán. Facultad de BioquĂmica, QuĂmica y Farmacia. Instituto de QuĂmica del Noroeste; Argentina. Universidad Nacional de Tucumán. Facultad de BioquĂmica, QuĂmica y Farmacia; ArgentinaXXIV Annual Scientific MeetingTafi del ValleArgentinaAsociaciĂłn de BiologĂa de Tucumá
Indigo production by Pseudomonas sp. J26, a marine naphthalene-degrading strain
A technique developed to determine naphthalene dioxygenase (NDO) activity was optimized and used to study the biotransformation of indole to indigo by Pseudomonas sp. J26 whole cells. The maximum production of indigo was achieved at 25 °C using 2.5 mM indole when J26 was grown in the complex medium JPP, while indole concentrations higher than 4 mM proved toxic for cells. The maximum rate of indigo production was 0.56 nmol min–1 mg dry biomass–1, obtaining 75.5 ÎĽM of indigo after 8 h of incubation, while a maximal concentration (138.1 ÎĽM) of indigo was obtained after 20 h.Fil: Riva Mercadal, Juan Pablo. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - Tucumán. Planta Piloto de Procesos Industriales MicrobiolĂłgicos; ArgentinaFil: Isaac, Paula. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - Tucumán. Planta Piloto de Procesos Industriales MicrobiolĂłgicos; ArgentinaFil: Siñeriz, Faustino. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - Tucumán. Planta Piloto de Procesos Industriales MicrobiolĂłgicos; ArgentinaFil: Ferrero, Marcela Alejandra. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - Tucumán. Planta Piloto de Procesos Industriales MicrobiolĂłgicos; Argentin