Efficient visible light induced synthesis of silver nanoparticles by Penicillium polonicum ARA 10 isolated from Chetomorpha antennina and its antibacterial efficacy against Salmonella enterica serovar Typhimurium

Neethu, Sahadevan; Midhun, Sebastian Jose; Sunil, M.A.; Soman, Soumya; Radhakrishnan, E. K.; Mathew, Jyothis

doi:10.1016/j.jphotobiol.2018.02.005

Cited by 65 publications

(25 citation statements)

References 32 publications

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“…In the samples with a concentration ratio of 1 : 3, S. braenderup and AgNPs, during 1 hour of exposure, changes in the size of the bacteria and in their morphology were evidenced (Figure 12(b)). Similar results were shown by Neethu et al on Salmonella typhimurium [35]. e SEM and TEM results showed the bactericidal activity of AgNPs using green synthesis with P. polonicum fungi.…”

Section: Scanning Electron Microscopy (Sem)supporting

confidence: 87%

Effect of Silver Nanoparticles on the Morphology of Toxoplasma gondii and Salmonella braenderup

Vergara-Duque

Cifuentes-Yepes

Hincapie-Riaño

et al. 2020

Journal of Nanotechnology

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The study of silver nanoparticles (AgNPs) has recently increased due to the different antimicrobial properties that have been evaluated. Studies have shown that AgNPs decrease the cell viability of some parasitic species and inhibit bacterial growth and biofilm formation. Toxoplasma gondii is a parasite with different stages of development including the oocyst, and it can survive in the environment for a long time generating contamination of vegetables and water. This parasite has the ability to generate congenital toxoplasmosis and chorioretinitis in humans. Another human pathogen present in water is Salmonella braenderup, this bacterium, when consumed, causes gastroenteritis and typhoid fever. We evaluate the affectation that causes the AgNPs in oocysts of T. gondii and S. braenderup using fluorescence microscopy and scanning electron microscopy techniques. The results showed that at different ratios of AgNPs and microorganisms, as well as at different exposure time during the treatments, morphological alteration of the cell structure of oocysts of T. gondii and S. braenderup was evidenced, suggesting a potential treatment method for the inhibition of the viability of these microorganisms.

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Section: Scanning Electron Microscopy (Sem)supporting

confidence: 87%

Effect of Silver Nanoparticles on the Morphology of Toxoplasma gondii and Salmonella braenderup

Vergara-Duque

Cifuentes-Yepes

Hincapie-Riaño

et al. 2020

Journal of Nanotechnology

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“…The capping layer of polyphenols reduce Ag +2 to Ag +0 and the oxidized polyphenol binds to the AgNPs via −C=O bonds and also simultaneously stabilizes them [34]. However, some recent literature suggest that sunlight-mediated green synthesis of AgNPs is the most facile way [22,35,36,37].…”

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles Synthesized by Using the Endophytic Bacterium Pantoea ananatis are Promising Antimicrobial Agents against Multidrug Resistant Bacteria

Rahman²,

et al. 2018

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Antibiotic resistance is one of the most important global problems currently confronting the world. Different biomedical applications of silver nanoparticles (AgNPs) have indicated them to be promising antimicrobial agents. In the present study, extracellular extract of an endophytic bacterium, Pantoea ananatis, was used for synthesis of AgNPs. The synthesized AgNPs were characterized by UV–Vis spectroscopy, FTIR, transmission electron microscopy (TEM), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX), and Zeta potential. The antimicrobial potential of the AgNPs against pathogenic Staphylococcus aureus subsp. aureus (ATCC 11632), Bacillus cereus (ATCC 10876), Escherichia coli (ATCC 10536), Pseudomonas aeruginosa (ATCC 10145) and Candida albicans (ATCC 10231), and multidrug resistant (MDR) Streptococcus pneumoniae (ATCC 700677), Enterococcus faecium (ATCC 700221) Staphylococcus aureus (ATCC 33592) Escherichia coli (NCTC 13351) was investigated. The synthesized spherical-shaped AgNPs with a size range of 8.06 nm to 91.32 nm exhibited significant antimicrobial activity at 6 μg/disc concentration against Bacillus cereus (ATCC 10876) and Candida albicans (ATCC 10231) which were found to be resistant to conventional antibiotics. The synthesized AgNPs showed promising antibacterial efficiency at 10 µg/disc concentration against the MDR strains. The present study suggests that AgNPs synthesized by using the endophytic bacterium P. ananatis are promising antimicrobial agent.

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“…And the fungus was verified to be able to withstand Pb(II) up to 12 mmol/L (2486.4 mg/L) 13 and to have a high removal efficiency for Pb(II) 23 . Further, P. polonicum can induce synthesis of silver nanoparticles under visible light 24 and affect its Pb(II) adsorption efficiency by applying external electric current 13 . Therefore, in this study, P. polonicum was used as test strain.…”

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confidence: 99%

Removal mechanism of Pb(II) by Penicillium polonicum: immobilization, adsorption, and bioaccumulation

Hao

et al. 2020

Sci Rep

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currently, lead (pb) has become a severe environmental pollutant and fungi hold a promising potential for the remediation of pb-containing wastewater. the present study showed that Penicillium polonicum was able to tolerate 4 mmol/L Pb(II), and remove 90.3% of them in 12 days through three mechanisms: extracellular immobilization, cell wall adsorption, and intracellular bioaccumulation. in this paper. the three mechanisms were studied by Raman, X-ray diffraction analysis (XRD), scanning electron microscopy (SeM), fourier transform infrared spectroscopy (ftiR) and transmission electron microscopy (teM). the results indicated that pb(ii) was immobilized as lead oxalate outside the fungal cell, bound with phosphate, nitro, halide, hydroxyl, amino, and carboxyl groups on the cell wall, precipitated as pyromorphite [pb 5 (po 4) 3 Cl] on the cell wall, and reduced to Pb(0) inside the cell. These combined results provide a basis for additionally understanding the mechanisms of pb(ii) removal by P. polonicum and developing remediation strategies using this fungus for lead-polluted water. The discharge of Pb-containing wastes from increased industrialization and human activities have resulted in negative impacts on the environment 1. Lead (Pb) upsets ecosystems, and endangers human health through bioaccumulation within the food chain 2. Consequently, various physicochemical treatment methods such as precipitation, coagulation, ionic exchange, inverse osmosis and adsorption have been used to remediate environmental Pb-containing contamination 3. However, such conventional methods involve either high operational costs or ineffective removal of Pb(II) at ppm levels, and may also cause secondary pollution during the repair process 4,5. In contrast, bioremediation has unique advantages, including adequate availability of materials, low cost, and no secondary pollution. Therefore, bioremediation continues to attract significant attention for the development of remedial alternatives 6-8. Over the last decade, filamentous fungi have emerged as versatile bioremediation agents owing to their adaptability to extreme conditions of pH, temperature, and nutrient availability as well as tolerance to high metal concentrations 9,10. A variety of fungal species with the ability to remove Pb(II) from aqueous solutions. For example, the Pb(II) uptake capacity for Saccharomyces cerevisiae 11 , Mucor rouxii 1 , Aspergillus niger 12 and Penicillium polonicum 13 is reported as 85.6, 74.6, 34.4 and 75.2 mg/g, respectively, indicating that the filamentous fungi have promising potential to be used for the Pb(II) polluted sewage treatment. Under stress from high concentrations of Pb(II), filamentous fungi possess various mechanisms for the removal of Pb(II) from aqueous systems 14 , One such mechanism is extracellular immobilization. In the presence of Pb(II) stress, various metabolic processes are stimulated and Pb(II) is chelated by excreted metabolites. Low molecular weight organic acids (LMWOAs) such as oxalic acid may play a significant role in...

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Efficient visible light induced synthesis of silver nanoparticles by Penicillium polonicum ARA 10 isolated from Chetomorpha antennina and its antibacterial efficacy against Salmonella enterica serovar Typhimurium

Cited by 65 publications

References 32 publications

Effect of Silver Nanoparticles on the Morphology of Toxoplasma gondii and Salmonella braenderup

Effect of Silver Nanoparticles on the Morphology of Toxoplasma gondii and Salmonella braenderup

Silver Nanoparticles Synthesized by Using the Endophytic Bacterium Pantoea ananatis are Promising Antimicrobial Agents against Multidrug Resistant Bacteria

Removal mechanism of Pb(II) by Penicillium polonicum: immobilization, adsorption, and bioaccumulation

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