Silver nanoparticles regulate Arabidopsis root growth by concentration-dependent modification of reactive oxygen species accumulation and cell division

Wang, Likai; Sun, Juzhi; Lin, Luming; Fu, Yajuan; Alenius, Harri; Lindsey, Keith; Chen, Chunli

doi:10.1016/j.ecoenv.2019.110072

Cited by 28 publications

(9 citation statements)

References 48 publications

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“…However, AgNP-PVP had no significant impact on castor bean seed germination and growth, while ionic silver significantly decreased those parameters [ 117 ]. In contrast, in the research of Wang et al [ 118 ], in which AgNP-PVP was localized in the cell wall and intercellular spaces of A. thaliana roots, it was found that AgNPs promoted root growth at low concentrations. However, higher concentrations had the opposite effect, suggesting a dose-dependent response.…”

Section: Silver Uptake and Effects On Growth And Morphologymentioning

confidence: 79%

“…This finding, in correlation with higher H 2 O 2 formation, suggests protections of cells from excess accumulation of H 2 O 2 through the ascorbate–glutathione cycle, where APX reduces the H 2 O 2 to H 2 O [ 141 ]. AgNP-PVP treatment of A. thaliana seedlings [ 178 ] and roots [ 118 ] also caused upregulation of POD genes, which encode another group of antioxidant enzymes. Proteomic analyses confirmed the importance of defense against oxidative stress in plants exposed to AgNPs.…”

Section: Changes In Gene and Protein Expressionmentioning

confidence: 99%

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Surface Coating-Modulated Phytotoxic Responses of Silver Nanoparticles in Plants and Freshwater Green Algae

et al. 2021

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Silver nanoparticles (AgNPs) have been implemented in a wide range of commercial products, resulting in their unregulated release into aquatic as well as terrestrial systems. This raises concerns over their impending environmental effects. Once released into the environment, they are prone to various transformation processes that modify their reactivity. In order to increase AgNP stability, different stabilizing coatings are applied during their synthesis. However, coating agents determine particle size and shape and influence their solubility, reactivity, and overall stability as well as their behavior and transformations in the biological medium. In this review, we attempt to give an overview on how the employment of different stabilizing coatings can modulate AgNP-induced phytotoxicity with respect to growth, physiology, and gene and protein expression in terrestrial and aquatic plants and freshwater algae.

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Section: Silver Uptake and Effects On Growth And Morphologymentioning

confidence: 79%

Section: Changes In Gene and Protein Expressionmentioning

confidence: 99%

Surface Coating-Modulated Phytotoxic Responses of Silver Nanoparticles in Plants and Freshwater Green Algae

et al. 2021

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“…4b). Currently, up-regulation of CYC genes is mostly reported in plants exposed to metal NPs, for example, Ag NPs at 50 mg L −1 induced the cell-cycle related gene expression ( CYCB1;1 ), thus promoting the cell division of root growth, 37 whereas the role of carbon-based NMs in the CYC is yet unknown. It is addressed that the regulation of the cell cycle is not directly correlated with the cytokinin concentration, 10 and the expression of D-type CYC is controlled by both cytokinin and nutrient availability.…”

Section: Resultsmentioning

confidence: 99%

Nanomaterial-induced modulation of hormonal pathways enhances plant cell growth

Wang

Tang

Zhu

et al. 2022

Environ. Sci.: Nano

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“…The accelerated oxidative degradation of the vegetable oil promoted by the AuNPs may be associated with their capacity for producing reactive oxygen species (ROS) [ 51 , 52 , 53 , 54 , 55 , 56 ]. It is known that the metal accelerates the oxidation of vegetable oils due to ROS generation [ 43 , 57 , 58 ].…”

Section: Resultsmentioning

confidence: 99%

Eco-Friendly Production of AuNPs and Their Impact on the Oil Oxidative Stability

et al. 2021

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Vegetable oils have been used for different applications and, more recently, as an active host medium to obtain nanoparticles for employment in bionanotechnological applications. Nevertheless, oils are very susceptible to oxidation during production, storage, and transportation because of their chemical composition. Consequently, any modification in their production must be accompanied by an analysis of the oxidative stability. In this study, naked and biocompatible gold nanoparticles (AuNPs) were grown on sunflower oil during sputtering deposition using different deposition times. Size and morphology were determined by transmission electron microscopy (TEM) and their concentrations were found by inductively coupled plasma-optical emission spectroscopy (ICP-OES). Rancimat® method was employed to evaluate the AuNPs influence on the oxidative stability of the vegetable oil. Well-dispersed quasi-spherical NPs were produced with a mean diameter in the 2.9–3.7 nm range and they were concentration-dependent on the deposition time. A concentration of about 11 mg/L, 38 mg/L, and 225 mg/L of AuNPs was obtained for a deposition time of 5 min, 15 min, and 30 min, respectively. The results also revealed that AuNPs negatively affected the oxidative stability of the sunflower oil and exponentially reduced the induction period (IP) with the increase in AuNPs content. IP reductions of 63%, 77%, and 81% were determined for the AuNPs containing samples at 11 mg/L, 38 mg/L, and 225 mg/L. For the first time, it is reported that naked AuNPs promote the rapid degradation of vegetable oil and this points out the need for attention relative to the quality of vegetable oils used to host metal nanoparticles.

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Silver nanoparticles regulate Arabidopsis root growth by concentration-dependent modification of reactive oxygen species accumulation and cell division

Cited by 28 publications

References 48 publications

Surface Coating-Modulated Phytotoxic Responses of Silver Nanoparticles in Plants and Freshwater Green Algae

Surface Coating-Modulated Phytotoxic Responses of Silver Nanoparticles in Plants and Freshwater Green Algae

Nanomaterial-induced modulation of hormonal pathways enhances plant cell growth

Eco-Friendly Production of AuNPs and Their Impact on the Oil Oxidative Stability

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