Green synthesis of silver nanoparticles using tomato leaf extract and their entrapment in chitosan nanoparticles to control bacterial wilt

Santiago, Thaís Ribeiro; Bonatto, Cínthia Caetano; Rossato, Maurício; Lopes, C.A.P.; Lopes, C. A.; Mizubuti, Eduardo S. G.; Silva, Luciano

doi:10.1002/jsfa.9656

Cited by 56 publications

(17 citation statements)

References 56 publications

(65 reference statements)

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“…vesicatoria. The Ag-NP-entrapped CS showed significant antibacterial activity against tomato wilt pathogen R. solanacearum [112]. They confirmed that green synthesized CS-derived NPs containing Ag-NPs from leaf extracts were a promising and sustainable alternative in agriculture.…”

Section: Antibacterial Activity Against Plant Pathogensmentioning

confidence: 58%

Antibacterial Activity of Chitosan Nanoparticles: A Review

2020

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In recent years, nanotechnology has attracted attention in many fields because it has several up-and-coming novel uses. Many researchers have suggested that chitosan nanoparticles (CS-NPs) and their derivatives are one of the best nanomaterials for delivering antibacterial activity. CS-NPs have a broad spectrum of antibacterial activity, but they manifest different inhibitory efficacy against gram-negative (G−) and gram-positive (G+) bacterial species. The mechanism of antibacterial action is an intricate process that varies between G− and G+ bacteria as a result of the differences in cell wall and cell membrane chemistry. In previous studies, greater antibacterial activity was more evident against G− bacteria than G+ bacteria, whereas in some studies G+ bacteria were more sensitive. Researchers predicted that the varied responses of bacteria are caused by the mixed hydrophilicity and negative charge distribution on the bacterial surface. Moreover, its activity depends on a number of variables including bacterial target (i.e., G− or G+ bacteria) and bacterial growth, as well as its concentration, pH, zeta-potential, molecular weight, and degree of acetylation. Therefore, this review examines current research on the mechanisms and factors affecting antibacterial activity, and application of CS-NPs specifically against animal and plant pathogenic bacteria.

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Section: Antibacterial Activity Against Plant Pathogensmentioning

confidence: 58%

Antibacterial Activity of Chitosan Nanoparticles: A Review

2020

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“…(b)). Furthermore, green synthesis, achieved by gallic acid‐mediated reduction of AgNO 3 is interesting because it can act simultaneously as a rapid reducing and stabilizing agent …”

Section: Resultsmentioning

confidence: 99%

Silver nanoparticle probe for colorimetric detection of aminoglycoside antibiotics: picomolar‐level sensitivity toward streptomycin in water, serum, and milk samples

et al. 2019

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BACKGROUND The low cost of aminoglycoside (AMG) antibiotics facilitates their excessive use in animal husbandry and the agriculture sector. This scenario has led to the occurrence of residues in the food chain. After several years of AMG use in antibacterial therapy, resistance to streptomycin has begun to appear. Most of the detection methods developed for AMG antibiotics lacks specificity. A broad target specific nanoprobe would be ideal for detecting the entire class of AMGs. A rapid and sensitive method for the detection of AMGs is urgently needed. RESULTS Gallic acid‐coated silver nanoparticles (AgNPs) were demonstrated as a nanoprobe for the colorimetric detection of AMGs (yellow to orange / red). A linear dynamic range of 50–650 pmol L−1 was achieved readily by ratiometric spectrophotometry (A560/A400) with a limit of detection (LOD) as low as 36 pmol L−1. The amine‐groups of the AMGs function as molecular linkers, so that electrostatic coupling interactions between neighboring particles drive the formation of AgNP aggregates. The assay can also be applied for the determination of streptomycin residues in serum and milk samples. CONCLUSION This study revealed the potential of an AgNP probe for the rapid and cost‐effective detection of low‐molecular‐weight target analytes, such as the AMGs. A ligand‐induced aggregation of AgNPs coated with gallic acid was reported to be a rapid and sensitive assay for AMGs. Analysis of streptomycin was demonstrated with excellent picomolar‐level sensitivity. Thus, the validated method can find practical applications in the ultrasensitive detection of AMGs in complex and diagnostic settings. © 2019 Society of Chemical Industry

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“…Authors have reported green-synthesized Ag NPs using different concentrations of aqueous extract of tomato leaves, followed by entrapment of AgNPs with chitosan (Ch-AgNPs). They used green synthesized systems for controlling tomato bacterial wilt caused by Ralstonia solanacearum [ 134 ]. Green synthesis procedures have also been demonstrated for the synthesis of chitosan bionanocomposites.…”

Section: Green Synthesis Of Chitin/chitosan/chitin and Chitosan Npsmentioning

confidence: 99%

Green Synthesized Chitosan/Chitosan Nanoforms/Nanocomposites for Drug Delivery Applications

Sivanesan

Gopal²,

Muthu³

et al. 2021

Polymers

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Chitosan has become a highlighted polymer, gaining paramount importance and research attention. The fact that this valuable polymer can be extracted from food industry-generated shell waste gives it immense value. Chitosan, owing to its biological and physicochemical properties, has become an attractive option for biomedical applications. This review briefly runs through the various methods involved in the preparation of chitosan and chitosan nanoforms. For the first time, we consolidate the available scattered reports on the various attempts towards greens synthesis of chitosan, chitosan nanomaterials, and chitosan nanocomposites. The drug delivery applications of chitosan and its nanoforms have been reviewed. This review points to the lack of systematic research in the area of green synthesis of chitosan. Researchers have been concentrating more on recovering chitosan from marine shell waste through chemical and synthetic processes that generate toxic wastes, rather than working on eco-friendly green processes—this is projected in this review. This review draws the attention of researchers to turn to novel and innovative green processes. More so, there are scarce reports on the application of green synthesized chitosan nanoforms and nanocomposites towards drug delivery applications. This is another area that deserves research focus. These have been speculated and highlighted as future perspectives in this review.

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Green synthesis of silver nanoparticles using tomato leaf extract and their entrapment in chitosan nanoparticles to control bacterial wilt

Cited by 56 publications

References 56 publications

Antibacterial Activity of Chitosan Nanoparticles: A Review

Antibacterial Activity of Chitosan Nanoparticles: A Review

Silver nanoparticle probe for colorimetric detection of aminoglycoside antibiotics: picomolar‐level sensitivity toward streptomycin in water, serum, and milk samples

Green Synthesized Chitosan/Chitosan Nanoforms/Nanocomposites for Drug Delivery Applications

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