Effect of nano cerium oxide on soybean (Glycine max L. Merrill) crop exposed to environmentally relevant concentrations

Autor(es)

Rodrigues, Eduardo S. ^[1] ; Montanha, Gabriel S. ^[1] ; de Almeida, Eduardo ^[1] ; Fantucci, Hugo ^[2] ; Santos, Rafael M. ^[2] ; de Carvalho, Hudson W. P. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Ctr Nucl Energy Agr, Lab Nucl Instrumentat, Ave Centenario 303, BR-13416000 Piracicaba, SP - Brazil

^[2] Univ Guelph, Sch Engn, Thornbrough Bldg, 50 Stone Rd E, Guelph, ON N1G 2W1 - Canada

• Tipo de documento: Artigo Científico
• Fonte: Chemosphere; v. 273, JUN 2021.
• Citações Web of Science: 2

Resumo

This study evaluated the uptake and translocation of cerium nanoparticles (CeO2 NPs) and soluble Ce(NO3)(3) by soybean plants (Glycine max L. Merrill) under the whole plant life-cycle and relevant environmental concentrations, 0.062 and 0.933 mg kg(-1), which represent maximal values for 2017 in agricultural soils and sludge treated soils, respectively. The experiments were carried out using a nutrient solution. Cerium was detected in the soybean roots epidermis and cortex, leaves, and grains, but it neither impaired plant development nor grain yield. The concentration of Ce in the shoot increased as a function of time for plants treated with Ce(NO3)(3), while it remained constant for plants treated with CeO2 NPs. It means that CeO2 NPs were absorbed in the same rate as biomass production, which suggests that they are taken up and transported by water mass flow. Single-particle inductively coupled plasma mass spectrometry revealed clusters of CeO2 NPs in leaves of plants treated with 25 nm CeO2 NPs (ca. 30-45 nm). The reprecipitation of soluble cerium from Ce(NO3)(3) within the plant was not confirmed. Finally, bioconcentration factors above one were found for the lowest concentrated treatments. Since soybean is a widespread source of protein for animals, we draw attention to the importance of evaluating the effects of Ce entrance in the food chain and its possible biomagnification. (C) 2020 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 15/19121-8 - EMU concedido no processo 2015/05942-0: sistema de microfluorescência de Raios X
• Beneficiário: Hudson Wallace Pereira de Carvalho
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
• Processo FAPESP: 15/05942-0 - Investigação do metabolismo de nanomateriais absorvidos por plantas empregando-se espectroscopias vibracional e de Raios X
• Beneficiário: Hudson Wallace Pereira de Carvalho
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 17/16375-4 - Efeitos da aplicação foliar de La e Ce em plantas de soja
• Beneficiário: Eduardo Santos
• Modalidade de apoio: Bolsas no Brasil - Mestrado