Localization of Coated Iron Oxide (Fe3O4) Nanoparticles on Tomato Seeds and Their Effects on Growth

Autor(es)

Lau, Elizabeth C. H. T. ^[1] ; Carvalho, Lucas B. ^[2] ; Pereira, Anderson E. S. ^[2] ; Montanha, Gabriel S. ^[3] ; Correa, Camila G. ^[3] ; Carvalho, Hudson W. P. ^[3] ; Ganin, Alexey Y. ^[4] ; Fraceto, Leonardo F. ^[2] ; Yiu, Humphrey H. P. ^[1]

Afiliação do(s) autor(es)

^[1] Heriot Watt Univ, Sch Engn & Phys Sci, Chem Engn, Edinburgh EH14 4AS, Midlothian - Scotland

^[2] Sao Paulo State Univ UNESP, Inst Sci & Technol, BR-18087180 Sorocaba, SP - Brazil

^[3] Univ Sao Paulo, Ctr Nucl Energy Agr, BR-13416000 Piracicaba, SP - Brazil

^[4] Univ Glasgow, Sch Chem, Glasgow G12 8QQ, Lanark - Scotland

• Tipo de documento: Artigo Científico
• Fonte: ACS APPLIED BIO MATERIALS; v. 3, n. 7, p. 4109-4117, JUL 20 2020.
• Citações Web of Science: 1

Resumo

Food demand due to the growing global population has been stretching the agriculture sector to the limit. This demands the cultivation of plants in shrinking land areas which makes the search for highly effective systems for plant nutrition and pest control important. In this context, the application of nanoparticles (NPs) in agriculture can have a transformative effect on food production techniques as it can enable the delivery of bioactive agents (including growth factors, pesticides, and fungicides) directly to plants. Herein, we report the application of unfunctionalized as well as amine-functionalized and polycaprolactone-coated Fe3O4 NPs to seed treatment in tomato (Solanum lycopersicum). The study reveals that the treatment has no side effects on plant germination and development. Furthermore, the translocation of NPs in seeds and seedlings posttreatment depends on the surface functionalization of the NPs. X-ray fluorescence spectroscopy analysis of seedlings suggested that around 66% of unfunctionalized Fe3O4 NPs were translocated in the cotyledons, while only 50% of functionalized NPs (both amine and polycaprolactone) were translocated. Our results demonstrate that all particles were taken up by the seeds, thus suggesting that the functionalized NPs can act as a versatile platform for delivering of active compounds, such as fungicides and growth factor agents. (AU)

• Processo FAPESP: 18/02413-4 - Nanomateriais híbridos inorgânico/orgânico visando estudo da interação entre nanopartículas e plantas
• Beneficiário: Leonardo Fernandes Fraceto
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional
• Processo FAPESP: 18/23608-8 - Desenvolvimento de nanopesticidas marcados com sondas fluorescentes para estudos de mecanismo de ação e toxicidade
• Beneficiário: Lucas Bragança de Carvalho
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• 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