Integrating ecotoxicity and chemical approaches to compare the effects of ZnO nanoparticles, ZnO bulk, and ZnCl2 on plants and microorganisms in a natural soil

García‐Gómez, Concepción; Babín, Mar; Obrador, Ana; Álvarez, Jose M.; Fernández, María Dolores

doi:10.1007/s11356-015-4867-y

Cited by 78 publications

(26 citation statements)

References 36 publications

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“…Zn partitioning is inextricably linked to soil acidity (Sauvé et al 2000), which, in turn, depends on the form of Zn added to the soil. In this study, a relatively low pH was observed for ionic treatments, and a relatively high pH was observed for NP treatments, which is consistent with the results of other studies (Kool et al 2011; Garcia-Gomez et al 2015).…”

Section: Discussionsupporting

confidence: 93%

“…It has been already recognized that upon reaching the soil, ZnO-NPs may have a negative impact on soil microorganisms, invertebrates, and plants (Hou et al 2018). Most studies have found, however, that ZnO-NPs are less toxic than zinc ions to soil-dwelling organisms (Garcia-Gomez et al 2015), including earthworms (Kwak and An 2015). Initially, the dissolution of zinc ions rather than the direct impact of NPs was proposed as the mechanism underlying the toxicity of ZnO-NPs (Kool et al 2011).…”

Section: Introductionmentioning

confidence: 99%

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Energy reserves and respiration rate in the earthworm Eisenia andrei after exposure to zinc in nanoparticle or ionic form

Świątek

Bednarska

2019

Environ Sci Pollut Res

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The energy budget is an indicator of an organism’s overall condition. Changes in energy reserves and/or energy consumption have been used as biomarkers of toxic stress. To understand the effects of different forms and concentrations of Zn and the costs of effective Zn regulation by the earthworm Eisenia andrei , we performed a toxicokinetic experiment in which individuals were sampled over time to determine the available energy reserves (total carbohydrate, protein, and lipid content), energy consumption (measured at the cellular level and as the whole-animal respiration rate), and internal Zn concentration. The earthworms were exposed to ZnCl 2 or zinc nanoparticles (ZnO-NPs) in Lufa 2.2 soil for 21 days (contamination phase), followed by 14 days of elimination in clean soil (decontamination phase). Carbohydrates were the only energy reserves with significantly lower levels following ZnO-NP 1000 treatment than following other treatments ( p ≤ 0.00001) in the contamination phase. The total available energy reserves and protein content did not differ among treatments, but a significant effect of exposure time was observed ( p ≤ 0.0001). Exposure to Zn (both ions and NPs) increased energy consumption at the cellular level, reflecting the high energy demand of the stress response. The results indicated that E. andrei can regulate internal Zn concentrations efficiently, regardless of form or concentration, without considerable impact on energy reserves or respiration rate. Electronic supplementary material The online version of this article (10.1007/s11356-019-05753-3) contains supplementary material, which is available to authorized users.

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Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Energy reserves and respiration rate in the earthworm Eisenia andrei after exposure to zinc in nanoparticle or ionic form

Świątek

Bednarska

2019

Environ Sci Pollut Res

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“…By contrast, interaction with silver ions (0.1 mM–1 mM) changed the biochemical, physiological and morphometric parameters, such as distorting the root epidermal structure or altering the anatomical features of sunflower plants [44]. ZnONPs (1000 mg/L) and copperNPs (500 mg/L) have also been demonstrated to slow the growth of seedlings [45,46]. In this type of study, an evaluation of the direct and indirect effects on the plants should be based on different nanomaterials and various plant species [4].…”

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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“…To better examine the phytotoxicity effect of soil contaminated by NPs, we have chosen to grow the soybean plants in soil with TiO 2 and Fe 3 O 4 NPs treatments that were applied as water suspension to mimic the condition of soil contamination by NP run offs. Such an application method has been commonly used in previous soil-based plant studies and has provided sufficient exposure and bioavailability of the NPs to the plants [ 7 , 23 , 24 ]. We found that TiO 2 NPs significantly reduced plant growth as compared to Fe 3 O 4 and these changes were also accompanied by reductions in leaf C content.…”

Section: Resultsmentioning

confidence: 99%

Iron Oxide and Titanium Dioxide Nanoparticle Effects on Plant Performance and Root Associated Microbes

Burke¹,

Pietrasiak²,

Situ

et al. 2015

IJMS

129

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In this study, we investigated the effect of positively and negatively charged Fe3O4 and TiO2 nanoparticles (NPs) on the growth of soybean plants (Glycine max.) and their root associated soil microbes. Soybean plants were grown in a greenhouse for six weeks after application of different amounts of NPs, and plant growth and nutrient content were examined. Roots were analyzed for colonization by arbuscular mycorrhizal (AM) fungi and nodule-forming nitrogen fixing bacteria using DNA-based techniques. We found that plant growth was significantly lower with the application of TiO2 as compared to Fe3O4 NPs. The leaf carbon was also marginally significant lower in plants treated with TiO2 NPs; however, leaf phosphorus was reduced in plants treated with Fe3O4. We found no effects of NP type, concentration, or charge on the community structure of either rhizobia or AM fungi colonizing plant roots. However, the charge of the Fe3O4 NPs affected both colonization of the root system by rhizobia as well as leaf phosphorus content. Our results indicate that the type of NP can affect plant growth and nutrient content in an agriculturally important crop species, and that the charge of these particles influences the colonization of the root system by nitrogen-fixing bacteria.

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Integrating ecotoxicity and chemical approaches to compare the effects of ZnO nanoparticles, ZnO bulk, and ZnCl2 on plants and microorganisms in a natural soil

Cited by 78 publications

References 36 publications

Energy reserves and respiration rate in the earthworm Eisenia andrei after exposure to zinc in nanoparticle or ionic form

Energy reserves and respiration rate in the earthworm Eisenia andrei after exposure to zinc in nanoparticle or ionic form

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

Iron Oxide and Titanium Dioxide Nanoparticle Effects on Plant Performance and Root Associated Microbes

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