Comparison of foliar spray and soil irrigation of biogenic CuO nanoparticles (NPs) on elemental uptake and accumulation in lettuce
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Environmental Science and Pollution Research
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Nanoparticles (NPs) can be used in several ways in agriculture, including increasing production rates and improving nutritional
values in plants. The present study aims to clarify how biogenic copper oxide nanoparticles (CuO NPs) applied by two routes of
exposure (foliar spray and soil irrigation) affect the elemental uptake by lettuce. In vivo experiments using lettuce (n = 4) were
performed with CuO NPs in comparison with copper salt (CuSO4), considering a final mass added of 20 mg of CuO per plant.
The elemental composition of roots was mostly affected by the soil irrigation exposure for both Cu forms (NPs and salt). Neither
Cu form added by soil irrigation was translocated to leaves. Copper concentration in leaves was mainly affected by foliar spray
exposure for both Cu forms (NPs and salt). All Cu forms through foliar spray were sequestered in the leaves and no translocation
to roots was observed. Foliar spray of CuO NPs caused no visual damage in leaves, resulted in less disturbance of elemental
composition, and improved dry weight, number of leaves, CO2 assimilation, and the levels of K, Na, S, Ag, Cd, Cr, Cu, and Zn in
leaves without causing significant changes in daily intake of most elements, except for Cu. Although Cu concentration increased
in leaves by foliar spray of CuO NPs, it remained safe for consumption.
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KOHATSU, MARCIO Y.; PELEGRINO, MILENA T.; MONTEIRO, LUCILENA R.; FREIRE, BRUNA M.; PEREIRA, RODRIGO M.; FINCHEIRA, PAOLA; RUBILAR, OLGA; TORTELLA, GONZALO; BATISTA, BRUNO L.; JESUS, TATIANE A. de; SEABRA, AMEDEA B.; LANGE, CAMILA N. Comparison of foliar spray and soil irrigation of biogenic CuO nanoparticles (NPs) on elemental uptake and accumulation in lettuce. Environmental Science and Pollution Research, v. 28, n. 13, p. 16350-16367, 2021. DOI: 10.1007/s11356-020-12169-x. Disponível em: http://repositorio.ipen.br/handle/123456789/31982. Acesso em: 26 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.