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Zinc oxide (ZnO) nanoparticles elevated iron and copper contents and mitigated the bioavailability of lead and cadmium in different leafy greens.
Ecotoxicol Environ Saf. 2020 Mar 15; 191:110177.EE

Abstract

Advances in large hydroponic production of leafy greens, easy adoption in urban agriculture, and large leaf surface area of many leafy greens, greatly increase their exposure to heavy metals and nanoparticles. Cadmium (Cd) and lead (Pb) are two highly toxic heavy metals, which threaten the health of humans and livestock even at trace levels. These heavy metals may be taken up by plant roots through the protein transporters used for essential minerals such as iron (Fe2+) and copper (Cu2+). Previous studies have shown that some metallic nanoparticles affect the performance of protein transporters and modify the plant uptake of co-existing heavy metal ions. This study aims to understand the role of zinc oxide nanoparticles (ZnONPs) in the uptake pattern of Cd and Pb and two key micronutrients of iron and copper in edible tissues of three leafy green species including spinach (Spinaciae oleracea), parsley (Petroselinum sativum) and cilantro (Coriandrum sativum). Pre-grown plant seedlings in soil (containing Cu and Fe) were transplanted to a hydroponic system (1/4th Hoagland solution) for 7 days as a transition, and then were exposed to four treatments in deionized water (1.0 mg L-1 Cd2++100.0 mg L-1 Pb2+, 1.0 mg L-1 Cd2++100.0 mg L-1 Pb2+ + 100 mg L-1 ZnONPs, 100 mg L-1 ZnO-ENPs and a control with no chemical exposure) for additional two weeks. At termination, shoots were gently separated from the roots, and the concentrations of Pb, Cd, Fe, Zn, and Cu in all plant tissues were quantified by inductively coupled plasma-mass spectrometry (ICP-MS). The results revealed that ZnONPs mitigated the uptake of both heavy metals in roots. The translocation of heavy metals was similar in the edible tissues of three species. The response of three leafy greens to the co-exposure of heavy metals and ZnONPs was different in Cu and Fe accumulation in edible tissues. Fe concentration in edible tissues in the co-exposed plants was increased in spinach (+10%) and cilantro (+9%) but decreased in parsley (-8%) compared to controls, while the Cu level in edible tissues increased in all three species following the order of cilantro (+8%)> spinach (+4%)> parsley (+1.5%).

Authors+Show Affiliations

Department of Biological and Agricultural Engineering, Texas A&M University, TAMU 2117, College Station, TX, 77840, USA. Electronic address: hsharifan@tamu.edu.Department of Biological and Agricultural Engineering, Texas A&M University, TAMU 2117, College Station, TX, 77840, USA. Electronic address: j.moore@tamu.edu.Zachry Department of Civil and Environmental Engineering, Texas A&M University, TAMU 3136, College Station, TX, 77843-3136, USA.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31958627

Citation

Sharifan, Hamidreza, et al. "Zinc Oxide (ZnO) Nanoparticles Elevated Iron and Copper Contents and Mitigated the Bioavailability of Lead and Cadmium in Different Leafy Greens." Ecotoxicology and Environmental Safety, vol. 191, 2020, p. 110177.
Sharifan H, Moore J, Ma X. Zinc oxide (ZnO) nanoparticles elevated iron and copper contents and mitigated the bioavailability of lead and cadmium in different leafy greens. Ecotoxicol Environ Saf. 2020;191:110177.
Sharifan, H., Moore, J., & Ma, X. (2020). Zinc oxide (ZnO) nanoparticles elevated iron and copper contents and mitigated the bioavailability of lead and cadmium in different leafy greens. Ecotoxicology and Environmental Safety, 191, 110177. https://doi.org/10.1016/j.ecoenv.2020.110177
Sharifan H, Moore J, Ma X. Zinc Oxide (ZnO) Nanoparticles Elevated Iron and Copper Contents and Mitigated the Bioavailability of Lead and Cadmium in Different Leafy Greens. Ecotoxicol Environ Saf. 2020 Mar 15;191:110177. PubMed PMID: 31958627.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Zinc oxide (ZnO) nanoparticles elevated iron and copper contents and mitigated the bioavailability of lead and cadmium in different leafy greens. AU - Sharifan,Hamidreza, AU - Moore,Janie, AU - Ma,Xingmao, Y1 - 2020/01/17/ PY - 2019/11/05/received PY - 2020/01/03/revised PY - 2020/01/05/accepted PY - 2020/1/21/pubmed PY - 2020/4/4/medline PY - 2020/1/21/entrez KW - Food safety KW - Heavy metals KW - Leafy greens KW - Nanoparticle SP - 110177 EP - 110177 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 191 N2 - Advances in large hydroponic production of leafy greens, easy adoption in urban agriculture, and large leaf surface area of many leafy greens, greatly increase their exposure to heavy metals and nanoparticles. Cadmium (Cd) and lead (Pb) are two highly toxic heavy metals, which threaten the health of humans and livestock even at trace levels. These heavy metals may be taken up by plant roots through the protein transporters used for essential minerals such as iron (Fe2+) and copper (Cu2+). Previous studies have shown that some metallic nanoparticles affect the performance of protein transporters and modify the plant uptake of co-existing heavy metal ions. This study aims to understand the role of zinc oxide nanoparticles (ZnONPs) in the uptake pattern of Cd and Pb and two key micronutrients of iron and copper in edible tissues of three leafy green species including spinach (Spinaciae oleracea), parsley (Petroselinum sativum) and cilantro (Coriandrum sativum). Pre-grown plant seedlings in soil (containing Cu and Fe) were transplanted to a hydroponic system (1/4th Hoagland solution) for 7 days as a transition, and then were exposed to four treatments in deionized water (1.0 mg L-1 Cd2++100.0 mg L-1 Pb2+, 1.0 mg L-1 Cd2++100.0 mg L-1 Pb2+ + 100 mg L-1 ZnONPs, 100 mg L-1 ZnO-ENPs and a control with no chemical exposure) for additional two weeks. At termination, shoots were gently separated from the roots, and the concentrations of Pb, Cd, Fe, Zn, and Cu in all plant tissues were quantified by inductively coupled plasma-mass spectrometry (ICP-MS). The results revealed that ZnONPs mitigated the uptake of both heavy metals in roots. The translocation of heavy metals was similar in the edible tissues of three species. The response of three leafy greens to the co-exposure of heavy metals and ZnONPs was different in Cu and Fe accumulation in edible tissues. Fe concentration in edible tissues in the co-exposed plants was increased in spinach (+10%) and cilantro (+9%) but decreased in parsley (-8%) compared to controls, while the Cu level in edible tissues increased in all three species following the order of cilantro (+8%)> spinach (+4%)> parsley (+1.5%). SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/31958627/Zinc_oxide__ZnO__nanoparticles_elevated_iron_and_copper_contents_and_mitigated_the_bioavailability_of_lead_and_cadmium_in_different_leafy_greens_ DB - PRIME DP - Unbound Medicine ER -