Antimicrobial Effects of Silver Nanoparticles Synthesized by Fatsia japonica Leaf Extracts for Preservation of Citrus Fruits

Abstract

Due to their potent antimicrobial activity, silver nanoparticles (AgNPs) synthesized by biomass might be promising in food preservation, whereas effects of AgNPs on Penicillium italicum-induced rot of Citrus fruits have not been investigated. In this study, a novel AgNPs biosynthesis method was developed based on Fatsia japonica leaf extracts. It was revealed that concentrations of leaf extracts, AgNO and NaCl affected AgNPs yields and particle sizes obviously. Under the optimized conditions (8 mg/mL extracts, 2 mM AgNO and 1 mM NaCl), AgNPs, synthesized within 80 min, showed potent preservative effect against P. italicum-induced rot of Citrus fruits. Furthermore, inhibition test and TEM analysis indicated that as-synthesized AgNPs caused cell deformation, cytoplasmic leakage, and thereupon cell death of P. italicum. Moreover, AgNPs had significant antibacterial activities against Escherichia coli and Staphylococcus aureus, which might be beneficial for Citrus fruits preservation. Altogether this study develops an efficient AgNPs synthesis method and a novel preservation method for Citrus fruits.

Metal–Organic Frameworks for Food Safety

“…22 In a similar study, Zhang et al developed a novel AgNPs biosynthesis method based on Fatsia japonica leaf extracts for the preservation of citrus fruits. 23 While AgNPs add significant value to food preservation, it is only one of the many available methods of improving the shelf life of food products. While natural essential oils are a valuable resource for food preservation, effectively utilizing this resource has been a challenge as the aroma from application of essential oils is undesirable.…”

“…Fayaz et al synthesized AgNPs through Trichoderma viride biosynthesis and incorporated the AgNPs into a sodium alginate thin film for fruit and vegetable preservation . In a similar study, Zhang et al developed a novel AgNPs biosynthesis method based on Fatsia japonica leaf extracts for the preservation of citrus fruits . While AgNPs add significant value to food preservation, it is only one of the many available methods of improving the shelf life of food products.…”

<p>Green nanotechnology: a review on green synthesis of silver nanoparticles — an ecofriendly approach</p>

“…Nanotechnology offers fields with effective applications, ranging from traditional chemical techniques to medicinal and environmental technologies. AgNPs have emerged with leading contributions in diverse applications, such as drug delivery,31 ointments, nanomedicine,37 chemical sensing,41 data storage,47 cell biology,54 agriculture, cosmetics,60 textiles,17 the food industry, photocatalytic organic dye–degradation activity,64 antioxidants,66 and antimicrobial agents 68…”

Antifungal, Antibacterial, and Cytotoxic Activities of Silver Nanoparticles Synthesized from Aqueous Extracts of Mace-Arils of Myristica fragrans

“…Among all the metals, silver is the most widely used, especially in the fabrication of NPs. AgNPs are already established and are extensively used in diverse fields such as nano fertilizers [30], nano pesticides [31], nanomedicine [32], drug delivery [33], as anti-microbial products [34] and in several biomedical applications. In spite of a few reports that point out the adverse toxicity effects of AgNPs, they have received considerable approval as an antibacterial, antifungal agent, and disinfectant [35].…”