Biosynthesis of Silver Nanoparticles by Morganella
Author Information
Author(s): Parikh Rasesh Y., Ramanathan Rajesh, Coloe Peter J., Bhargava Suresh K., Patole Milind S., Shouche Yogesh S., Bansal Vipul
Primary Institution: National Centre for Cell Science, Pune University Campus, Pune, India
Hypothesis
Is extracellular silver nanoparticles (AgNPs) production a genus-wide phenotype associated with all members of genus Morganella?
Conclusion
All members of the genus Morganella can synthesize extracellular crystalline silver nanoparticles, independent of environmental changes.
Supporting Evidence
- All Morganella biogroups formed dark brown solutions indicating AgNPs formation.
- AgNPs synthesis was confirmed by UV-Vis spectroscopy, TEM, and XRD.
- AgNPs production reached saturation within 20 hours for most biogroups.
- AgNPs synthesis was not observed in closely related genera of Enterobacteriaceae.
- Presence of SilE gene homologue was confirmed in all Morganella strains.
Takeaway
This study shows that a group of bacteria called Morganella can make tiny silver particles, and all types of Morganella can do this, not just one kind.
Methodology
Morganella isolates were exposed to Ag+ ions, and the resulting nanoparticles were analyzed using TEM, UV-vis, and XRD.
Limitations
The study does not explore the optimal conditions for AgNPs synthesis for each Morganella biogroup.
Digital Object Identifier (DOI)
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