Green Synthesis, Characterization and Antibacterial Activity of Silver Nanoparticles of Endophytic Fungi Aspergillus terreus

Rani, Reena; Sharma, Deepak; Chaturvedi, Monika; Yadav, Jaya Parkash

doi:10.4172/2157-7439.1000457

Cited by 54 publications

(22 citation statements)

References 38 publications

(41 reference statements)

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“…Previously, AgNPs have displayed alpha-glucosidase inhibition [ 30 ]. Our results are also supported by previous antidiabetic studies of AgNPs [ 30 , 31 , 68 ]. In summary, the AgNPs in this study demonstrated interesting enzymatic activity, although mostly lower than those of the corresponding precursors, the most important fact is that they showed inhibitory activities.…”

Section: Resultssupporting

confidence: 91%

Biosynthesis, Characterization, and Biological Activities of Procyanidin Capped Silver Nanoparticles

Badeggi

Badmus

Botha

et al. 2020

JFB

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In this study, procyanidin dimers and Leucosidea sericea total extract (LSTE) were employed in the synthesis of silver nanoparticles (AgNPs) and characterized by ultraviolet-visible (UV-Visible) spectroscopy, high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), X-ray diffraction (XRD), and dynamic light scattering (DLS) techniques. AgNPs of about 2–7 nm were obtained. DLS and stability evaluations confirmed that the AgNPs/procyanidins conjugates were stable. The formed nanoparticles exhibited good inhibitory activities against the two enzymes studied. The IC50 values against the amylase enzyme were 14.92 ± 1.0, 13.24 ± 0.2, and 19.13 ± 0.8 µg/mL for AgNPs coordinated with LSTE, F1, and F2, respectively. The corresponding values for the glucosidase enzyme were 21.48 ± 0.9, 18.76 ± 1.0, and 8.75 ± 0.7 µg/mL. The antioxidant activities were comparable to those of the intact fractions. The AgNPs also demonstrated bacterial inhibitory activities against six bacterial species. While the minimum inhibitory concentrations (MIC) of F1-AgNPs against Pseudomonas aeruginosa and Staphylococcus aureus were 31.25 and 15.63 µg/mL respectively, those of LSTE-AgNPs and F2-AgNPs against these organisms were both 62.50 µg/mL. The F1-AgNPs demonstrated a better bactericidal effect and may be useful in food packaging. This research also showed the involvement of the procyanidins as reducing and capping agents in the formation of stable AgNPs with potential biological applications.

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Section: Resultssupporting

confidence: 91%

Biosynthesis, Characterization, and Biological Activities of Procyanidin Capped Silver Nanoparticles

Badeggi

Badmus

Botha

et al. 2020

JFB

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“…A large number of attempts have been made in the previous decade to explore the biological applications of endophytic organisms, and these microbes have been widely utilized for the synthesis of nanoparticles. Nanoparticles are chemical entities with a size below 100 nm with various biological applications, and they can be prepared using physical, chemical, and biological methods [ 5 ]. Physical and chemical methods comprise synthesis by laser ablation, evaporation-condensation, chemical reduction, microwave, sol-gel process, vapor deposition, and laser pyrolysis [ 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

“…Nanoparticles are chemical entities with a size below 100 nm with various biological applications, and they can be prepared using physical, chemical, and biological methods [ 5 ]. Physical and chemical methods comprise synthesis by laser ablation, evaporation-condensation, chemical reduction, microwave, sol-gel process, vapor deposition, and laser pyrolysis [ 5 , 6 , 7 ]. Although physical and chemical methods have gained significant popularity over biological methods, their biomedical applications are greatly limited due to the use of toxic and hazardous chemicals.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Silver Nanoparticles by Cytobacillus firmus Isolated from the Stem Bark of Terminalia arjuna and Their Antimicrobial Activity

et al. 2021

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This work reports an eco-friendly synthesis of silver nanoparticles (AgNPs) using endophytic bacteria, Cytobacillus firmus isolated from the stem bark of Terminalia arjuna. The synthesis of AgNPs was confirmed by visual observation as a change in color of the bacterial solution impregnated with silver. Further, the morphology of the AgNPs, average size, and presence of elemental silver were characterized by UV–Visible spectroscopy, scanning electron microscopy, and dynamic light scattering spectroscopy. The roles of endophytic secondary metabolites in the metal reduction, stabilization, and capping of silver nanoparticles were studied by qualitative FTIR spectral peaks. The antimicrobial ability of AgNPs was evaluated against Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria and pearl millet blast disease-causing fungi (Magnoporthe grisea). The biosynthesized AgNPs showed good antibacterial and antifungal activities. AgNPs effectively inhibited the bacterial growth in a dose-dependent manner and presented as good antifungal agents towards the growth of Magnoporthe grisea.

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“…Para fungos os gêneros mais explorados são Aspergillus (VERMA et al, 2010;DEVI;JOSHI, 2015;NETALA et al, 2016;RANI et al, 2017;HAMASHEKHAR et al, 2017;ABDEL-AZIZ et al, 2018), Penicillium (BHASKARA RAO et al, 2010;RAHI;PARMAR, 2014;CHANDRAPPA et al, 2016;NEETHU et al, 2016BHATTACHARJEE et al, 2017, Phoma (BIRLA et al, 2009;RAI et al, 2015), Colletotrichum (AZMATH et al, 2016), Trichoderma, Alternaria e Fusarium (BALAKUMARAN et al, 2015;HALKAI et al, 2017;SINGH et al, 2017). Todos esses autores relacionam a micosíntese de nanopartículas destes endófitos com aplicações biotecnológicas como atividades antibacteriana e fúngica, citotóxica ou antioxidante.…”

Section: Síntese De Nanopartículas Por Endófitosunclassified

Síntese Biológica De Nanopartículas Mediada Por Micro-Organismos Endofíticos

Oliveira

Cótica

et al. 2019

RESC

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RESUMO: Endófitos são fungos e bactérias que vivem no interior das plantas sem causar nenhum dano aos seus hospedeiros. Nas últimas décadas o potencial biotecnológico desses micro-organismos tem aumentado com o advento da nanotecnologia. Estudos descobriram que fungos e bactérias são capazes de produzirem nanopartículas por meio de rotas intra ou extracelulares, processo este que passou a ser descrito como micosíntese. O interesse cada vez maior para métodos mais sustentáveis e biológicos resultou no desenvolvimento de nanopartículas nãotóxicas e comparativamente mais bioativas. Ao contrário dos métodos físicos e químicos, a micosíntese é rentável e favorável ao meio ambiente. Neste trabalho buscamos realizar uma revisão de literatura acerta dos microorganismos endofíticos e síntese biológica de nanopartículas. Os gêneros de bactérias endofíticas mais estudados quanto a micosíntese destacam-se Bacillus e Pseudomonas, enquanto para fungos Aspergillus, Penicillium, Fusarium, Colletotrichum, Altrnaria e Trichoderma. Dentre as principais aplicações biotecnológicas destas nanopartículas oriundas da síntese microbiana temos atividades antibacterianas, citotóxicas e antioxidantes. A associação entre endófitos e nanopartículas está em fase exploratória para compreender com clareza os mecanismos responsáveis por essa interação. Entretanto, sabe-se que estas nanopartículas produzidas por meio da micosíntese já são prospectadas em algumas atividades biológicas. Espera-se que todas as espécies de plantas abriguem endófitos, os quais podem ser isolados e bioprospectados para a produção de novas ou já conhecidas nanopartículas. PALAVRAS-CHAVE:Endófitos. Micosíntese. Nanotecnologia. Aplicações biotecnológicas.

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Green Synthesis, Characterization and Antibacterial Activity of Silver Nanoparticles of Endophytic Fungi Aspergillus terreus

Cited by 54 publications

References 38 publications

Biosynthesis, Characterization, and Biological Activities of Procyanidin Capped Silver Nanoparticles

Biosynthesis, Characterization, and Biological Activities of Procyanidin Capped Silver Nanoparticles

Green Synthesis of Silver Nanoparticles by Cytobacillus firmus Isolated from the Stem Bark of Terminalia arjuna and Their Antimicrobial Activity

Síntese Biológica De Nanopartículas Mediada Por Micro-Organismos Endofíticos

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