Synthesis and characterization of silver nanoparticles: effect on phytopathogen Colletotrichum gloesporioides

Aguilar-Méndez, Miguel A.; Martín‐Martínez, Eduardo San; Ortega‐Arroyo, Lesli; Cobián-Portillo, Georgina; Sánchez-Espíndola, Esther

doi:10.1007/s11051-010-0145-6

Cited by 157 publications

(71 citation statements)

References 20 publications

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“…Morones et al [40] observed that silver nanoparticles disrupt transport systems including ion efflux and caused rapid accumulation of silver ions, in addition to interrupting cellular processes such as respiration and metabolism due to reacting with molecules. Moreover, using effective concentrations of ChNPs and AgNPs were effective against the tested fungal pathogens relative to control and were agreed with findings of some investigators who studied a successful antagonism of various fungal pathogens by silver nanoparticles at different concentrations [41][42][43]. Darsef and Suhartono [44] suggested that the mechanism, which chitosan affects the growth of fungi, may be due to its ability to interfere with the negatively charged residues of macromolecules exposed on fungal surfaces forming polyelectrolytic complexes, and affecting membrane permeability as well as causing leakage of intracellular electrolytes and proteinaceous constituents.…”

Section: Disease Assessmentsupporting

confidence: 88%

Chitosan and Silver Nanoparticles as Control Agents of Some Faba Bean Spot Diseases

Ahmed¹

2017

J Plant Pathol Microbiol

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Faba bean (Vicia fabae L.) is one of the most economic legume crops in Egypt. The antifungal effects of different concentrations of Chitosan and silver nanoparticles (20 ppm, 40 ppm, 60 ppm, 80 ppm and 100 ppm) were studied against aggressive isolates of Botrytis fabae and Alternaria alternata causing chocolate spot disease and Alternaria leaf spot disease respectively. Under laboratory conditions, the application of five concentrations of Chitosan nanoparticles and silver nanoparticles to the cultures of B. fabae and A. alternata showed significant inhibition of mycelial growth. Number of spores/ml decreased with increasing of nanoparticle concentration. Mycelial weight of fungal pathogens also decreased. The lesion growth was suppressed by increasing in the concentration of nanoparticles with significantly different relative to control using detached leaf test. Under greenhouse conditions, chitosan and silver nanoparticles were sprayed in concentrations 60 ppm, 80 ppm, and 100 ppm on faba bean plants. The tested nanoparticles showed significant effect against B. fabae and A. alternata relative to control. The obtained results indicated that the highest reduction of chocolate spot severity was obtained with treatment by 100 ppm of silver nanoparticles (52.94%) followed by chitosan nanoparticles 80 ppm (50.59%). While the application of 100 ppm of chitosan nanoparticles was highly efficient against Alternaria leaf spot where the reduction in disease severity (67.13%) followed by 100 ppm silver nanoparticles which caused reduction rate (61.5%). The obtained results indicated the possibility of using chitosan and silver nanoparticles as a substance in the manufacturing of fungicides to minimize the impact of chocolate spot and Alternaria leaf spot diseases in faba bean. However, further experimental trials under field conditions and safety evaluation studies are needed before the nanoparticles types and concentrations can be used as potential antifungal agents.

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Section: Disease Assessmentsupporting

confidence: 88%

Chitosan and Silver Nanoparticles as Control Agents of Some Faba Bean Spot Diseases

Ahmed¹

2017

J Plant Pathol Microbiol

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“…The idea of nanotechnology was coinedby Professor Richard Feynman [1]. Nanosilver has been used for more than 150 years in the form of colloidal silver, and registered as a biocidal agent in the United States [2].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Silver Nanoparticles Synthesizing Bacteria and Its Possible Use in Treatment of Multi Drug Resistant Isolate

Tripathi¹

2017

FEM

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Nanobiotechnology is apromisingarea to cater human life. Biological methods for the synthesis of silver nanoparticles are relatively cost effective process. It was aimed at synthesizing silver nanoparticles using water and soil borne bacterial isolates, characterization of silver nanoparticles using UV-Vis spectroscopy and Fourier transform infra red (FTIR) spectroscopy and its effect on multi drug resistant bacterial isolate. The biosynthesis of silver nanoparticles was evaluated in both bacterial biomass and culture supernatant of Bacillus, Pseudomonas and Escherichia coli in the presence of 1mM of AgNO 3 . On the basis of physical appearances of silver nano particles, Pseudomonas sp. was selected for synthesis. The absorbance spectra of reaction mixture of bacterial biomass and supernatant show the strong peak at 420 nm, indicating the presence of silver nanoparticles (AgNPs) using UV-Vis and FTIR spectrophotometry. The influence of synthesized AgNPs wastested against multi drug resistant (MDR) Staphylococcus sp. on Mueller Hinton agar. The multi antibiotics resistant Staphylococcus sp. Showe dantibiotic sensitivity against the antibiotic discs impregnated with silver nanoparticles. The characteristics of silver nanoparticlesrevealedits possible use in biomedical field.

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“…For example, certain authors reported that AgNPs produce free radicals which can cause damage to the protein and lipid membrane followed by destruction of microorganisms (Jung et∼al. 2010;Aguilar-Méndez et∼al. 2011;Kim et∼al.…”

Section: Resultsmentioning

confidence: 99%

Inhibition of Fusarium solani in transgenic insect-resistant cotton plants treated with silver nanoparticles from Prosopis glandulosa and Pluchea sericea

Abdelmoteleb

González-Mendoza

Valdez‐Salas

et al. 2018

Egypt J Biol Pest Control

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The phytosynthesis of nanoparticles is a green chemistry approach that combines nanotechnology and bioactive compounds of plants. The aim of this study was to evaluate the effect of silver nanoparticles (AgNPs) from Prosopis glandulosa and Pluchea sericea, respectively, on the control of Fusarium solani previously inoculated in the rhizosphere of transgenic insect-resistant cotton plants. The results showed that the weekly application of AgNPs from P. glandulosa and P. sericea caused a diminution of fungal propagules in the soil after 30 days of treatment. In this sense, the AgNPs from P. glandulosa were more efficient in the reduction of infection points in the roots of the plants infected with F. solani compared with AgNPs from P. sericea. Additionally, the application of AgNPs from both plants showed a significant increase of optimum quantum yield (Fv/Fm), stomata conductance (g s ), and the number of lateral roots in transgenic insect-resistant cotton plants after 30 days of exposure when compared to the control. Based on our results, AgNPs from P. glandulosa and P. sericea could inhibit growth of Fusarium solani. However, more extensive and elaborate studies are needed to explain the different mechanisms that participate in the inhibition of growth of fungus using nanoparticles from these plants.

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Synthesis and characterization of silver nanoparticles: effect on phytopathogen Colletotrichum gloesporioides

Cited by 157 publications

References 20 publications

Chitosan and Silver Nanoparticles as Control Agents of Some Faba Bean Spot Diseases

Chitosan and Silver Nanoparticles as Control Agents of Some Faba Bean Spot Diseases

Characterization of Silver Nanoparticles Synthesizing Bacteria and Its Possible Use in Treatment of Multi Drug Resistant Isolate

Inhibition of Fusarium solani in transgenic insect-resistant cotton plants treated with silver nanoparticles from Prosopis glandulosa and Pluchea sericea

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