Silver nanoparticles: From in vitro green synthesis to in vivo biological effects in plants

Zhang, Na; Sun, Juzhi; Yin, Liyan; Liu, J.; Chen, Chunli

doi:10.1016/j.aac.2023.08.004

Cited by 12 publications

(3 citation statements)

References 154 publications

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“…Malondialdehyde (MDA) is produced by lipid peroxidation in the cell membrane because of cell damage or stress injury. 39 The contents of MDA could reflect membrane integrity, to some degree. As shown in pathway.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Design, Synthesis, Bioactivity, and Tentative Exploration of Action Mode for Benzyl Ester-Containing Derivatives

Yuan,

Fu,

et al. 2024

J. Agric. Food Chem.

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The active splicing strategy has witnessed improvement in bioactivity and antifungal spectra in pesticide discovery. Herein, a series of simple-structured molecules (Y1−Y53) containing chloro-substituted benzyl esters were designed using the above strategy. The structure−activity relationship (SAR) analysis demonstrated that the fatty acid fragment-structured esters were more effective than those containing an aromatic acid moiety or naphthenic acid part. Compounds Y36 and Y41, which featured a thiazole-4-acid moiety and trifluoromethyl aliphatic acid part, respectively, exhibited excellent in vivo curative activity (89.4%, 100 mg/L Y36) and in vitro fungicidal activity (EC 50 = 0.708 mg/L, Y41) against Botrytis cinerea. Determination of antifungal spectra and analysis of scanning electron microscopy (SEM), membrane permeability, cell peroxidation, ergosterol content, oxalic acid pathways, and enzymatic assays were performed separately here. Compound Y41 is cost effective due to its simple structure and shows promise as a disease control candidate. In addition, Y41 might act on a novel target through a new pathway that disrupts the cell membrane integrity by inducing cell peroxidation.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Design, Synthesis, Bioactivity, and Tentative Exploration of Action Mode for Benzyl Ester-Containing Derivatives

Yuan,

Fu,

et al. 2024

J. Agric. Food Chem.

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“…Plant extracts can be obtained from various parts of the plant such as leaf, stem, root, bark, fruit, callus, flower, bud, the whole plant [16], or even plant wastes [17]. Table 1 provides information regarding different types of plant extracts and agro-wastes used to biosynthesize AgNPs.…”

Section: Introductionmentioning

confidence: 99%

Use of Residual Malt from an Artisanal Beer Brewing Process in the Biosynthesis of Silver Nanoparticles Mediated by Nucleating and Structure-Directing Agents

Dueñas-Bolaños,

Cid-Hernández,

Velázquez-Juárez

et al. 2024

Molecules

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Biosynthesized silver nanoparticles (AgNPs) are widely used in varied applications, which are morphology dependent. Consequently, a morphology-controlled synthesis is mandatory. Although there are several studies focused on the plant extract-based biosynthesis of metallic nanoparticles, the use of extracts obtained from agro-wastes is scant. Furthermore, information regarding morphology modification through the use of additional agents is even more scarce. Thus, in this study, AgNPs were synthesized using a malt extract (ME) obtained from an artisanal beer brewing process residue. Additionally, sodium chloride (NaCl), gum arabic (GA), and talc (T) were used in an attempt to modify the morphology of AgNPs. XRD, DLS, SEM, and TEM results demonstrate that stable AgNPs of different sizes and shapes were synthesized. FTIR, HPLC analysis, and the quantification of total proteins, free amino acids, reducing sugars, and total polyphenols before and after AgNPs synthesis showed that ME biomolecules allowed them to act as a source of reducing and stabilizing agents. Therefore, this study provides evidence that ME can be successfully used to biosynthesize AgNPs. Additionally, the antibacterial activity of AgNPs against Gram-negative and Gram-positive bacteria was evaluated. Results indicate that AgNPs show a higher antibacterial activity against Gram-positive bacteria.

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“…The green synthesis of AgNPs is based on a redox reaction, in which Ag + ions are reduced to stable AgNPs using the components of living things [19]. The green synthesis of AgNPs involves the reduction of Ag + ions to stable AgNPs through redox reactions facilitated by biological constituents like plant extracts, which utilize electron donors from the metabolism of organisms [20][21][22]. Plant extracts with antioxidant compounds like flavonoids or phenolics can donate electrons to Ag + ions, while enzymes like laccase or peroxidase catalyze the reduction reaction through redox-active sites.…”

Section: Introductionmentioning

confidence: 99%

Biofabrication of Silver Nanoparticles by Azadirachta indica Rhizosphere Bacteria with Enhanced Antibacterial Properties

Kattali,

Mampett,

Kodoor

et al. 2024

Eng

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Microorganisms (MOs) are prominent in ecological functioning and balance. The rhizosphere is considered one of the most diverse ecosystems on Earth and serves as a breeding spot for many MOs. Rhizosphere microbial diversity changes according to plant species, genotype, and the nature of the soil. The current study reports the possible use of bacteria isolated from the rhizosphere of Azadirachta indica for synthesizing silver nanoparticles (AgNPs). The physicochemical characterization and antibacterial activity of these green synthesized AgNPs are also reported. The gene (16S rRNA) sequence of bacteria isolated from the rhizosphere showed a maximum similarity of 99.25% with Bacillus subtilis. After incubation, the colorless reaction mixture transformed to brown, which indicates the formation of AgNPs, and UV-vis spectral analysis also confirmed the biosynthesis of AgNPs. Compared to lower temperatures, the efficiency of AgNP synthesis was high at the higher temperature. The scanning electron microscope image demonstrated spherical-shaped AgNPs with sizes ranging from 18 to 21 nm. Energy-dispersive X-ray analysis established the elemental analysis of synthesized AgNPs. The synthesized AgNPs showed strong bactericidal properties against pathogenic bacteria Klebsiella pneumonia, Pseudomonas aeruginosa, Escherichia coli, and methicillin-resistant Staphylococcus aureus.

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Silver nanoparticles: From in vitro green synthesis to in vivo biological effects in plants

Cited by 12 publications

References 154 publications

Design, Synthesis, Bioactivity, and Tentative Exploration of Action Mode for Benzyl Ester-Containing Derivatives

Design, Synthesis, Bioactivity, and Tentative Exploration of Action Mode for Benzyl Ester-Containing Derivatives

Use of Residual Malt from an Artisanal Beer Brewing Process in the Biosynthesis of Silver Nanoparticles Mediated by Nucleating and Structure-Directing Agents

Biofabrication of Silver Nanoparticles by Azadirachta indica Rhizosphere Bacteria with Enhanced Antibacterial Properties

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