Comparative study of the phytotoxicity of ZnO nanoparticles and Zn accumulation in nine crops grown in a calcareous soil and an acidic soil

García‐Gómez, Concepción; Obrador, Ana; González, Demetrio; Babín, Mar; Fernández, María Dolores

doi:10.1016/j.scitotenv.2018.06.356

Cited by 116 publications

(46 citation statements)

References 53 publications

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“…Meanwhile, for an acidic soil (pH 5.4) spiked with ZnO nanoparticles, the EC50 values of total soil Zn for several agricultural crops ranged from 111 to >900 mg kg -1 (García-Gómez et al 2018). The EC50 values obtained by García-Gómez et al (2018) are similar to those obtained by Beyer et al (2013) but considerably lower than those obtained in the present study (Table 2).…”

Section: Resultssupporting

confidence: 81%

“…We propose that oxides, sulfides, and carbonates represent a more realistic source of contamination, in comparison with the commonly used sulfates, nitrates, chlorides, and acetates. For instance, other studies have used metal oxides (PbO, NiO, ZnO, CuO, and CoO) for the enrichment of unpolluted soil with metals (e.g., Bandyopadhyay et al 2015;Read et al 2016;García-Gómez et al 2018;Elikem et al 2019).…”

Section: Introductionmentioning

confidence: 99%

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Use of Zinc Carbonate Spiking to Obtain Phytotoxicity Thresholds Comparable to Those in Field‐Collected Soils

Grigorita

Neaman

Brykova

et al. 2020

Enviro Toxic and Chemistry

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Several studies have reported the presence of smithsonite (ZnCO3) in soils polluted by zinc mining. The present study aimed to determine upper critical threshold values of Zn phytotoxicity in a substrate spiked with ZnCO3 and to compare them with those obtained in field‐collected soils. We studied Zn toxicity to perennial ryegrass (Lolium perenne L.) grown in pots with unpolluted peat treated with increasing concentrations of ZnCO3 that produced nominal total Zn concentrations of 0, 0.7, 1.3, 2.0, 2.6, and 3.3%. To keep constant near‐neutral pH value in all the treatments, we used decreasing concentrations of dolomitic lime. In the treatment with total soil Zn of 3.3% (pH 6.8), the foliar Zn concentration of L. perenne was 1914 ± 211 mg kg–1, falling into the range of 2400 ± 300 mg kg–1 reported for Lolium species grown under similar laboratory conditions in a polluted soil (total soil Zn 5.4%, pH 7.3) collected near a Zn smelter. The value of 92 ± 98 mg kg–1 was obtained for the median effective concentration (EC50) values of 0.01 M KNO3‐extractable Zn using the responses of shoot dry biomass, shoot length, and total pigments. This value falls within the range of 95 ± 46 mg kg–1 reported in other studies for the EC50 values of salt‐extractable Zn using field‐collected soils. The application of ZnCO3 for spiking was able to mimic foliar Zn concentrations of Lolium species observed in field‐collected soils. The effective concentrations of soil Zn obtained in the present study are comparable to those obtained in field‐collected soils. Future research should determine effective concentrations of metals using soils spiked with metal‐containing compounds that mimic a real source of contamination. Environ Toxicol Chem 2020;39:1790–1796. © 2020 SETAC

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Section: Resultssupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Use of Zinc Carbonate Spiking to Obtain Phytotoxicity Thresholds Comparable to Those in Field‐Collected Soils

Grigorita

Neaman

Brykova

et al. 2020

Enviro Toxic and Chemistry

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“…Dissolution can be affected by environmental conditions, for example, pH and EC, to which ENPs are subjected upon release into the environment [ 68 ]. Soil pH can affect metal bioavailability and phytotoxicity of NPs [ 48 ]. Generally, an alkaline condition promotes NPs aggregation, while an acidic environment could trigger metal and oxide NPs’ dissolution, transforming them into ionic species [ 87 , 88 ].…”

Section: Resultsmentioning

confidence: 99%

“…Based on the soil test, fertilizers of urea (86 kg/ha, 46% N; as a starter) and triple superphosphate (100 kg/ha, 44% P 2 O 5 equivalent to 19% P) were added to the soil before planting ensued. Soil pH and electrical conductivity (EC) were continuously measured until harvest (at intervals of 30 days), following García-Gómez et al [ 48 ], in soil:water (1:5 suspensions). For soil amendment, copper compounds (Cu 2+ ; CuONPs: 25 nm, 50 nm, and 250 nm) were suspended in 100 mL distilled water to achieve the desired nominal concentrations (0-, 50-, 100-, 200-, and 500-mg CuONP/kg soil or Cu 2+ /kg soil).…”

Section: Methodsmentioning

confidence: 99%

Root System Architecture, Copper Uptake and Tissue Distribution in Soybean (Glycine max (L.) Merr.) Grown in Copper Oxide Nanoparticle (CuONP)-Amended Soil and Implications for Human Nutrition

Yusefi-Tanha

Fallah

Rostamnejadi

et al. 2020

Plants

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Understanding the potential uptake and biodistribution of engineered nanoparticles (ENPs) in soil-grown plants is imperative for realistic toxicity and risk assessment considering the oral intake of edibles by humans. Herein, growing N-fixing symbiont (Bradyrhizobium japonicum) inoculated soybean (Glycine max (L.) Merr.) for a full lifecycle of 120 days, we assessed the potential influence of particle size (25, 50, and 250 nm) and concentration (0, 50, 100, 200, and 500 mg/kg soil) of Copper oxide nanoparticles (CuONPs) on: (1) root system architecture, (2) soil physicochemical attributes at the soil–root interface, and (3) Cu transport and accumulation in root, stem, leaf, and seed in soybean, and compared them with the soluble Cu2+ ions and water-only controls. Finally, we performed a comparative assessment of total seed Cu levels in soybean with other valuable food sources for Cu intake and discussed potential human health implications. Results showed particle size- and concentration-dependent influence of CuONPs on Cu uptake and distribution in root, stem, leaf, and seed. Alterations in root architecture (root biomass, length, volume, and area) were dependent on the Cu compound types, Cu concentrations, and their interactions. Concentration–response relationships for all three sizes of CuONPs and Cu2+ ions were found to be linear. Furthermore, CuONPs and Cu2+ ions had inhibitory effects on root growth and development. Overall, soybean responses to the smallest size of CuONPs–25 nm—were greater for all parameters tested compared to the two larger-sized CuONPs (50 nm, 250 nm) or Cu2+ ions. Results suggest that minor changes in soil-root physicochemical attributes may not be a major driver for Cu uptake in soybean. Cu bioaccumulation followed the order: root > leaf > stem > seed. Despite reduction in root architecture and seed yield, the smallest size CuONPs–25 nm led to increased total seed Cu uptake compared to the larger-sized CuONPs or Cu2+ ions. Our findings also suggest that soil amendment with CuONPs, and more so with the smallest size of CuONPs–25 nm—could significantly improve seed nutritional Cu value in soybean as reflected by the % Daily Values (DV) and are rated “Good” to “Very Good” according to the “World’s Healthiest Foods” rating. However, until the potential toxicity and risk from CuONP-fortified soybean seed ingestion is characterized in humans, we caution recommending such seeds for daily human consumption when addressing food Cu-deficiency and associated diseases, globally.

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“…The mechanism that operates in alkaline conditions mainly involves chemisorption and complexation by organic ligands [ 19 ]. García-Gómez et al [ 20 ] who investigated the impact of ZnO-NP on various crops cultivated on two soils of different pH and properties believed that the contribution of soil organic matter content to the availability of zinc was small. It appeared to be an influence of pH rather than of organic matter content, because there was variance among the results collected from acidic soil and calcareous soil, the percentage of organic matter was low in both soils and the values were similar (<2%).…”

Section: Resultsmentioning

confidence: 99%

Impact of Bulk ZnO, ZnO Nanoparticles and Dissolved Zn on Early Growth Stages of Barley—A Pot Experiment

Nemček

Šebesta

Urík

et al. 2020

Plants

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Zinc is among the most in-demand metals in the world which also means that a considerable amount of this element is released to the environment each year as a result of human activities. A pot experiment was conducted to study the impact of low- and high-dose zinc amendments on plant growth and biomass yield, with Calcic Chernozem as a growing medium and barley (Hordeum vulgare L.) as a model plant. The distribution of zinc in various plant parts was also investigated. Zn (II) was added in powder as bulk ZnO and in solution as ZnO nanoparticles and ZnSO4 in two dosages (3 and 30 mmol kg−1 soil) prior to planting. The plants were harvested after 10 days of growth. The three sets of data were taken under identical experimental conditions. The application of zinc in aqueous solution and in particulate form (having particle sizes in the range of <100 nm to >500 nm) at concentration of 3 and 30 mmol Zn kg−1 to the soil resulted in decreased growth (root length, shoot length) and biomass yield; the only exception was the addition of 30 mmol Zn kg−1 in the form of bulk ZnO, which had a positive effect on the root growth. The dry weight reduction (sprout biomass) was lowest in plants grown in soil treated with dissolved zinc. There were no statistically significant changes in the content of chlorophyll a, chlorophyll b, and total chlorophyll, although flame atomic absorption spectrometry (FAAS) analysis indicated that plants bioaccumulated the zinc applied. This implies that the transport of zinc into the above-ground plant parts is controlled by the presence of effective mechanical and physiological barriers in roots. Crop performance under zinc stress in relation to biomass production and the growth of roots and shoots is also partly a reflection of the effects of soil properties. Our findings emphasize the importance of considering plant-soil interactions in research of potential toxicity and bioavailability of zinc in the environment.

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Comparative study of the phytotoxicity of ZnO nanoparticles and Zn accumulation in nine crops grown in a calcareous soil and an acidic soil

Cited by 116 publications

References 53 publications

Use of Zinc Carbonate Spiking to Obtain Phytotoxicity Thresholds Comparable to Those in Field‐Collected Soils

Use of Zinc Carbonate Spiking to Obtain Phytotoxicity Thresholds Comparable to Those in Field‐Collected Soils

Root System Architecture, Copper Uptake and Tissue Distribution in Soybean (Glycine max (L.) Merr.) Grown in Copper Oxide Nanoparticle (CuONP)-Amended Soil and Implications for Human Nutrition

Impact of Bulk ZnO, ZnO Nanoparticles and Dissolved Zn on Early Growth Stages of Barley—A Pot Experiment

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