Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Antibacterial Effect of Silver Nanoparticles (AgNPs) Synthesized from Trichoderma Harzianum Against Clavibacter Michiganensis

Noshad, Asma LU ; Iqbal, Mudassar ; Folkers, Laura LU ; Hetherington, Crispin LU orcid ; Khan, Aamir ; Numan, Muhammad and Ullah, Saleem (2019) In Journal of Nano Research 58. p.10-19
Abstract

In nanotechnology, fungal mediated green synthesis of silver nanoparticles (AgNPs) has tremendous application in the development of antimicrobial systems but the mechanism behind the synthesis is yet to be understood. This study aims to synthesize the silver nanoparticles via a green chemistry route using mycellial aqueous extract of agriculturally beneficial fungi Trichoderma harzianum. Two different concentrations (1 mM and 2.5 Mm) of aqueous silver salt (AgNO3) were used and mixed as 1:1 ratio with aqueous extract of T. harzianum at room temperature and the pH of the reaction mixture was monitored until it stabilized. Formation of AgNPs was confirmed by using UV-Vis spectroscopic analysis. For further insight, AgNPs were... (More)

In nanotechnology, fungal mediated green synthesis of silver nanoparticles (AgNPs) has tremendous application in the development of antimicrobial systems but the mechanism behind the synthesis is yet to be understood. This study aims to synthesize the silver nanoparticles via a green chemistry route using mycellial aqueous extract of agriculturally beneficial fungi Trichoderma harzianum. Two different concentrations (1 mM and 2.5 Mm) of aqueous silver salt (AgNO3) were used and mixed as 1:1 ratio with aqueous extract of T. harzianum at room temperature and the pH of the reaction mixture was monitored until it stabilized. Formation of AgNPs was confirmed by using UV-Vis spectroscopic analysis. For further insight, AgNPs were characterized by using HR-TEM and XRD, which clearly showed appearance of crystalline, monodispersed round-shaped particles of 3-20 nm in size. The synthesised NPs were subjected to antimicrobial assay against gram +ve and gram –ve bacteria using the disk diffusion method. The focused species was Clavibacter michiganensis subsp michiganensis, which is the causitive pathogen of Tomato canker disease and we hypothesised that the synthesised AgNPs might be useful to control this pathogen. Appreciable antibiotic activity was monitored even at a low concentration of 1mM level, while the zone of inhibition was positively increased at 2.5 mM. Our results clearly indicate that the present process is an excellent candidate for industrial scale production of AgNPs, and has the potential to control the bacterial pathogen cmm.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Antimicrobial activity, Clavibacter michiganensis (cmm), Green synthesis, Silver nanoparticles (AgNPs), T. Harzianum (Trichoderma Harzianum)
in
Journal of Nano Research
volume
58
pages
10 pages
publisher
Trans Tech Publications
external identifiers
  • scopus:85077127270
ISSN
1662-5250
DOI
10.4028/www.scientific.net/JNanoR.58.10
language
English
LU publication?
yes
id
a82960cb-14f6-4489-8881-58dd99d652e7
date added to LUP
2022-04-01 09:33:25
date last changed
2023-11-21 03:42:53
@article{a82960cb-14f6-4489-8881-58dd99d652e7,
  abstract     = {{<p>In nanotechnology, fungal mediated green synthesis of silver nanoparticles (AgNPs) has tremendous application in the development of antimicrobial systems but the mechanism behind the synthesis is yet to be understood. This study aims to synthesize the silver nanoparticles via a green chemistry route using mycellial aqueous extract of agriculturally beneficial fungi Trichoderma harzianum. Two different concentrations (1 mM and 2.5 Mm) of aqueous silver salt (AgNO3) were used and mixed as 1:1 ratio with aqueous extract of T. harzianum at room temperature and the pH of the reaction mixture was monitored until it stabilized. Formation of AgNPs was confirmed by using UV-Vis spectroscopic analysis. For further insight, AgNPs were characterized by using HR-TEM and XRD, which clearly showed appearance of crystalline, monodispersed round-shaped particles of 3-20 nm in size. The synthesised NPs were subjected to antimicrobial assay against gram +ve and gram –ve bacteria using the disk diffusion method. The focused species was Clavibacter michiganensis subsp michiganensis, which is the causitive pathogen of Tomato canker disease and we hypothesised that the synthesised AgNPs might be useful to control this pathogen. Appreciable antibiotic activity was monitored even at a low concentration of 1mM level, while the zone of inhibition was positively increased at 2.5 mM. Our results clearly indicate that the present process is an excellent candidate for industrial scale production of AgNPs, and has the potential to control the bacterial pathogen cmm.</p>}},
  author       = {{Noshad, Asma and Iqbal, Mudassar and Folkers, Laura and Hetherington, Crispin and Khan, Aamir and Numan, Muhammad and Ullah, Saleem}},
  issn         = {{1662-5250}},
  keywords     = {{Antimicrobial activity; Clavibacter michiganensis (cmm); Green synthesis; Silver nanoparticles (AgNPs); T. Harzianum (Trichoderma Harzianum)}},
  language     = {{eng}},
  pages        = {{10--19}},
  publisher    = {{Trans Tech Publications}},
  series       = {{Journal of Nano Research}},
  title        = {{Antibacterial Effect of Silver Nanoparticles (AgNPs) Synthesized from Trichoderma Harzianum Against Clavibacter Michiganensis}},
  url          = {{http://dx.doi.org/10.4028/www.scientific.net/JNanoR.58.10}},
  doi          = {{10.4028/www.scientific.net/JNanoR.58.10}},
  volume       = {{58}},
  year         = {{2019}},
}