Stress Responses of Aquatic Plants to Silver Nanoparticles

Lin, Yu‐Ching; Richardson, Curtis J.; Ho, Mengchi; Willis, C Wesley; Colman, Benjamin P.; Wiesner, Mark R.

doi:10.1021/acs.est.7b05837

Cited by 86 publications

(34 citation statements)

References 56 publications

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“…For instance, Favas et al (2012) recorded mean arsenic concentrations of 0.90 mg/kg in the roots and rhizomes of Typha latifolia L. in Portugal, which is comparable with the range of means in our sampling sites (0.517-1.84 mg/kg). Yuan et al (2018), in experimental treatments in the USA, recorded 4.49-8.87 mg/kg Ag in the root tissue of Juncus effusus L., which is much higher than our findings (0.02-0.54 mg/kg).…”

Section: Trace Elements In Sedimentcontrasting

confidence: 92%

“…Nonetheless, the information on the distribution and bioaccumulation of other trace elements such as Ni, As, Sr and Ag remains very scarce, with only one published study (Ochieng et al 2006) on Ni and Ag in surface sediments. Ag, for instance, is fast becoming an element of interest in aquatic pollution studies due to its toxicity and increased usage in various consumer products (Plessl et al 2018;Yuan et al 2018). Moreover, the distribution of trace elements in sediment cores has received very little attention in Lake Victoria.…”

Section: And the Responsible Editor: Philippe Garriguesmentioning

confidence: 99%

“…According to WHO (2002), emissions from smelting operations, manufacture and disposal of certain photographic and electrical supplies were among the major anthropogenic sources of silver in the biosphere. Recent studies such as McGillicuddy et al (2017) and Yuan et al (2018) have shown that the usage of silver nano-particles has increased in numerous consumer products such as textiles, medical products, domestic appliances, food containers, cosmetics, paints and nano-functionalised plastics in many parts of the world. These products release silver into aquatic ecosystems through wastewater discharge, which raises health and environmental concerns.…”

Section: Trace Elements In Sedimentmentioning

confidence: 99%

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Distribution of arsenic, silver, cadmium, lead and other trace elements in water, sediment and macrophytes in the Kenyan part of Lake Victoria: spatial, temporal and bioindicative aspects

Outa

Kowenje

Plessl

et al. 2019

Environ Sci Pollut Res

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This is the first detailed report on the distribution of Ni, As, Sr and Ag in water, sediments and macrophytes from Lake Victoria, complemented with recent data on the heavy metals Cr, Cu, Zn, Cd and Pb. The study was conducted over an 11-month period at five sites in the Kenyan part of Lake Victoria: four sites in the Winam Gulf influenced by various anthropogenic pressures including a site near Kisumu City, and one in the main lake, perceived to have lesser direct anthropogenic influence. Compared with the main lake site, the water in Winam Gulf had significantly higher values for electrical conductivity and concentrations of dissolved components: organic carbon and bound nitrogen, as well as major and most trace elements. This contamination is also evident in surface sediments, which contained significantly higher levels of Cr, Zn, As, Ag, Cd and Pb compared with the main lake site. The mean levels of Cr, Cu, Zn, Ag and Pb exceeded probable effect levels at least at one of the gulf sites. The sediments at the Kisumu City site were classified as severely polluted with Cu (up to 259 mg/kg dw) and Pb (up to 1188 mg/kg dw). The sediment cores showed significantly higher levels of Cu, Zn, Ag, Cd and Pb in the surface (0-3 cm) versus subsurface (22-25 cm) layer at the Kisumu City site, indicating increasing pollution by these elements within the last 15 years. This is also the first report on trace elements in the emergent water plant Vossia cuspidata and submerged plant Ceratophyllum demersum from this lake. Even though the accumulation of most elements is comparable between C. demersum (whole plant) and V. cuspidata roots, the latter shows a better bioindicative potential. Contamination of the gulf with Ni, Cu, Zn, Ag, Cd and Pb is well mirrored in V. cuspidata roots. V. cuspidata strongly restricts the acropetal transport of trace elements, and hence using the shoots as fodder does not pose a risk to livestock.

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Section: Trace Elements In Sedimentcontrasting

confidence: 92%

Section: And the Responsible Editor: Philippe Garriguesmentioning

confidence: 99%

Section: Trace Elements In Sedimentmentioning

confidence: 99%

See 1 more Smart Citation

Distribution of arsenic, silver, cadmium, lead and other trace elements in water, sediment and macrophytes in the Kenyan part of Lake Victoria: spatial, temporal and bioindicative aspects

Outa

Kowenje

Plessl

et al. 2019

Environ Sci Pollut Res

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“…To grow and develop effectively, plants have a variety of defence mechanisms against external stress, and the antioxidant system is one of the mechanisms that plants use to resist damage caused by their own reactive oxygen free radicals [27]. Previous studies also noted that plant exposure to engineered NPs, such those containing Ag, are becoming a topic of increasing concern due to the over-accumulation of reactive oxygen species (ROS), which attack biofilms, lead to lipid peroxidation and induce DNA and protein damage [28].…”

Section: Resultsmentioning

confidence: 99%

MgONPs Can Boost Plant Growth: Evidence from Increased Seedling Growth, Morpho-Physiological Activities, and Mg Uptake in Tobacco (Nicotiana tabacum L.)

Cai

Liu

et al. 2018

Molecules

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In this study, we documented the impact of magnesium oxide nanoparticles (MgONPs) on the various morpho-physiological changes by root irrigation in tobacco plants in the matrix media, as well as the uptake and accumulation of the NPs over a range of concentrations (50–250 μg/mL). Our results showed that the seed germination rate was not affected following exposure to MgONPs for 5 days. Enhanced plant growth together with increased peroxidase activity (39.63 U mg−1 protein in the 250 μg/mL MgONPs treatment, 36.63 U mg−1 protein in the control), superoxide dismutase activity (30.15 U mg−1 protein compared to 26.95 U mg−1 protein in the control), and chlorophyll content (the chlorophyll a and b contents in 0 and 250 μg/mL of MgONPs were 0.21, 0.12 μg/g to 1.21, 0.67 μg/g, respectively) were observed after 30 days of MgONP treatment. However, the malondialdehyde, protein, and relative water contents did not differ significantly, indicating that the NPs in the test concentrations had no phytotoxicity and even promoted plant growth. Scanning electron microscopy and paraffin section observations indicated that the MgONPs did not affect the plant tissue structures and cells. In addition, an elevated Mg content was detected in the plant tissues exposed to MgONPs, suggesting that the Mg was taken up by the tobacco roots and translocated to the shoots and leaves, which were probably the most important tools to cause an increase in the chlorophyll content and stimulate growth. In particular, compared with the controls, a substantially higher Mg content was observed in the leaves (12.93 mg/g in the MgONPs treatment, 9.30 mg/g in the control) exposed to 250 μg/mL MgONPs, especially in the lower and middle leaves. This result confirmed that the contents of plant Mg-element in the old leaves were increased by MgONPs. In summary, this study investigated increased Mg uptake and growth stimulation, as well as the induction of various positive morpho-physiological changes to tobacco plants when exposed to MgONPs. Results elucidate the promotional impact of the NPs on plant health and their implications for agricultural safety and security.

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“…Factors and levels for L 9 (34 ) OAD experiments and MIC for AgNPs-COS against S. aureas and E. coli.…”

mentioning

confidence: 99%

Multivalent and synergistic chitosan oligosaccharide-Ag nanocomposites for therapy of bacterial infection

Mei

Shi

et al. 2020

Sci Rep

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chitosan oligosaccharide functionalized silver nanoparticles with synergistic bacterial activity were constructed as a multivalent inhibitor of bacteria. placing the chitosan oligosaccharide on silver nanoparticles can dramatically enhance the adsorption to the bacterial membrane via multivalent binding. the multicomponent nanostructures can cooperate synergistically against gram-positive and gram-negative bacteria. the antibacterial activity was increased via orthogonal array design to optimize the synthesis condition. The synergistic bacterial activity was confirmed by fractional inhibitory concentration and zone of inhibition test. through studies of antimicrobial action mechanism, it was found that the nanocomposites interacted with the bacteria by binding to Mg 2+ ions of the bacterial surface. then, the nanocomposites disrupted bacterial membrane by increasing the permeability of the outer membrane, resulting in leakage of cytoplasm. this strategy of chitosan oligosaccharide modification can increase the antibacterial activity of silver nanoparticles and accelerate wound healing at the same time. the nanomaterial without cytotoxicity has promising applications in bacteria-infected wound healing therapy. Human health has been threatened with abuse of antibiotics and the appearance of multiple drug-resistant bacteria 1,2. In the European Union, the number of deaths attributable to antibiotic-resistant bacteria is about 25,000 each year 3. Therefore, it is crucial to design and develop new antimicrobial materials with high antibacterial activity and low resistance in the field of biomedicine. Silver nanoparticles (AgNPs) with small size and large specific surface area have a stronger antibacterial effect against different bacteria, virus, and fungi 4-6. AgNPs can contact with bacterial cell membranes, penetrate into the cytoplasm, and then inactivate essential respiratory enzymes and proteins, leading to bacterial death 7,8. However, these antibacterial action of AgNPs is often dependent on high concentration since their physical collision with bacterial surface is random 9. For enhancing interaction of AgNPs and the bacteria, cationic polymers-stabilized AgNPs were designed to bind to the negatively charged cell surfaces of the bacteria by electrostatic interaction 10,11. However, the toxicity of cationic polymers obstructed their biomedicine application. Then, to improve their biocompatibility, collagen-stabilized AgNPs were prepared by a photochemical method 12. However, it was found that this AgNPs showed a weaker antibacterial property, comparing with small molecules-stabilized AgNPs (eg. lysine and citrate). Chitosan oligosaccharide (COS), which is a cationic, non-immunogenic, biocompatible and an FDA-recognized mucoadhesive polymer 13 , with low molecular and good water-solubility is the positively charged alkaline-amino-oligosaccharide. Several biological activities of COS, such as hemostasis, antibacterial activity and anti-inflammatory effects, have been extensively studied in biomaterials field 14. ...

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Stress Responses of Aquatic Plants to Silver Nanoparticles

Cited by 86 publications

References 56 publications

Distribution of arsenic, silver, cadmium, lead and other trace elements in water, sediment and macrophytes in the Kenyan part of Lake Victoria: spatial, temporal and bioindicative aspects

Distribution of arsenic, silver, cadmium, lead and other trace elements in water, sediment and macrophytes in the Kenyan part of Lake Victoria: spatial, temporal and bioindicative aspects

MgONPs Can Boost Plant Growth: Evidence from Increased Seedling Growth, Morpho-Physiological Activities, and Mg Uptake in Tobacco (Nicotiana tabacum L.)

Multivalent and synergistic chitosan oligosaccharide-Ag nanocomposites for therapy of bacterial infection

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