Biosynthesis of silver nanoparticles from Pseudomonas fluorescens and their antifungal activity against Aspergillus niger and Fusarium udum

Emerging plant diseases have posed a significant danger to global economies in recent years. Fungicide resistance and climate change are the two primary sources of pathogen outbreaks. The silver nanoparticles (AgNPs) have been demonstrated to restrain pathogenic bacteria, fungi and viruses with mini...

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Bibliographic Details
Published in:Annals of applied biology 2022-09, Vol.181 (2), p.235-245
Main Authors: Sodimalla, Triveni, Yalavarthi, Nagaraju
Format: Article
Language:English
Subjects:
Antifungal activity
Aspergillus niger
Biosynthesis
Chemical synthesis
Climate change
DLS
Fabrication
Fungi
Fungicides
Fusarium
Fusarium udum
Light scattering
Microorganisms
Mycelia
Nanoparticles
Photon correlation spectroscopy
Phytopathogenic fungi
Phytotoxicity
Plant diseases
Production costs
Pseudomonas fluorescens
Pseudomonas sp
Resonance scattering
Silver
silver nanoparticles
Silver nitrate
Spectroscopy
Surface plasmon resonance
TEM
Toxicity
Transmission electron microscopy
Viruses
Zeta potential
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Summary:Emerging plant diseases have posed a significant danger to global economies in recent years. Fungicide resistance and climate change are the two primary sources of pathogen outbreaks. The silver nanoparticles (AgNPs) have been demonstrated to restrain pathogenic bacteria, fungi and viruses with minimal risk of developing resistance and phytotoxicity. The synthesis of silver nanoparticles via chemical and physical methods raises concerns about environmental safety and production costs. The microbial bio‐fabrication of silver nanoparticles is simple, cost‐effective and ready‐to‐use technology. We used Pseudomonas fluorescens cell filtrates to synthesise silver nanoparticles in the current investigation. The silver nanoparticles were characterised using Dynamic Light Scattering, zeta potential (ζ), UV‐Vis spectroscopy, surface plasmon resonance analysis and transmission electron microscopy (TEM). Both silver nanoparticles and AgNO3 were tested for their ability to inhibit two phytopathogenic fungi, that is, Fusarium udum and Aspergillus niger. Potent inhibition of mycelial growth was observed when silver nanoparticles were used at a concentration of 150 ppm. However, further research is needed to assess the toxicity of AgNPs before they are mass‐produced and used in agricultural applications. Biofabrication of silver nanoparticles from Pseudomonas fluorescences
ISSN:0003-4746
1744-7348
DOI:10.1111/aab.12761