X-ray Spectroscopy Uncovering the Effects of Cu Based Nanoparticle Concentration and Structure on Phaseolus vulgaris Germination and Seedling Development

Autor(es)

Duran, Nadia M. ; Savassa, Susilaine M. ; de Lima, Rafael Giovanini ; de Almeida, Eduardo ; Linhares, Francisco S. ; van Gestel, Cornelis A. M. ; Pereira de Carvalho, Hudson W.

• Tipo de documento: Artigo Científico
• Fonte: Journal of Agricultural and Food Chemistry; v. 65, n. 36, p. 7874-7884, SEP 13 2017.
• Citações Web of Science: 8

Resumo

Nanoparticles properties such as solubility, tunable surface charges, and singular reactivity might be explored to improve the performance of fertilizers. Nevertheless, these unique properties may also bring risks to the environment since the fate of nanopartides is poorly understood. This study investigated the impact of a range of CuO nanopartides sizes and concentrations on the germination and seedling development of Phaseolus vulgaris L. Nanopartides did not affect seed germination, but seedling weight gain was promoted by 100 mg Cu L-1 and inhibited by 1 000 mg Cu L-1 of 25 nm CuO and CuSO4. Most of the Cu taken up remained in the seed coat with Cu hotspots in the hilum. X-ray absorption spectroscopy unraveled that most of the Cu remained in its pristine form. The higher surface reactivity of the 25 nm CuO nanopartides might be responsible for its deleterious effects. The present study therefore highlights the importance of the nanoparticle structure for its physiological impacts. (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
• Linha de fomento: 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
• Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores