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Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles

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Silver nanoclusters with Ag

Benedetta Orfei¹, Chiaraluce Moretti², Stefania Loreti³

¹Department of Agricultural, Food and Environmental Sciences, University of Perugia, Perugia, Italy.

Applied Microbiology and Biotechnology

|June 8, 2023

Summary

This summary is machine-generated.

Silver ultra nanoclusters (ARGIRIUM‑SUNCs) show potent antimicrobial activity against plant pathogens, inhibiting growth and biofilm formation. These nanoparticles effectively protect tomato plants from bacterial diseases without phytotoxicity, offering a promising eco-friendly alternative.

Keywords:

Clavibacter michiganensis subsp. michiganensis Pseudomonas syringae pv. tomato Silver nanoparticles Xanthomonas vesicatoria Xylella fastidiosa subsp. pauca

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Published on: February 11, 2016

Area of Science:

Nanotechnology in Agriculture
Plant Pathology
Antimicrobial Agents

Background:

Copper compounds, the primary treatment for plant bacterial diseases, face challenges due to resistance and environmental toxicity.
Developing eco-friendly and effective alternatives for managing plant bacterial diseases is crucial.
Nanoparticles present a promising avenue for novel plant disease control strategies.

Purpose of the Study:

To evaluate the efficacy of electrochemically synthesized silver ultra nanoclusters (ARGIRIUM‑SUNCs) in protecting plants against phytopathogenic bacteria.
To assess the antimicrobial activity, biofilm inhibition, and plant protection capabilities of ARGIRIUM‑SUNCs.

Main Methods:

Synthesis of silver ultra nanoclusters (ARGIRIUM‑SUNCs) with an average size of 1.79 nm and characterized by Ag2+/3+ oxidative states.
In vitro testing against Pseudomonas syringae pv. tomato, Xanthomonas vesicatoria, Xylella fastidiosa subsp. pauca, and Clavibacter michiganensis subsp. michiganensis.
Assessment of biofilm inhibition and eradication, phytotoxicity, and plant protection in tomato plants via root absorption.

Main Results:

ARGIRIUM‑SUNCs demonstrated strong in vitro inhibition of bacterial growth (EC50 < 1 ppm) and biofilm formation.
Treatments with ARGIRIUM‑SUNCs eradicated biofilms of P. syringae pv. tomato, X. vesicatoria, and C. michiganensis subsp. michiganensis.
Root application of ARGIRIUM‑SUNCs (10 ppm) protected tomato plants (80%) against P. syringae pv. tomato without causing phytotoxicity and induced hormetic effects.

Conclusions:

Silver ultra nanoclusters (ARGIRIUM‑SUNCs) exhibit significant antimicrobial and antibiofilm properties against key phytopathogenic bacteria.
ARGIRIUM‑SUNCs offer a safe and effective method for protecting tomato plants from bacterial diseases like bacterial speck.
The use of ARGIRIUM‑SUNCs represents a viable, environmentally friendly alternative for managing plant bacterial diseases.