In Vivo Evaluation of Zn Foliar Uptake and Transport in Soybean Using X-ray Absorption and Fluorescence Spectroscopy

Autor(es)

Gomes, Marcos H. F. ^[1] ; Machado, Bianca A. ^[1] ; Rodrigues, Eduardo S. ^[1] ; Montanha, Gabriel Sgarbiero ^[1] ; Rossi, Monica Lanzoni ^[1] ; Otto, Rafael ^[2] ; Linhares, Francisco S. ^[1] ; Carvalho, Hudson W. P. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Ctr Nucl Energy Agr, BR-13416000 Piracicaba, SP - Brazil

^[2] Univ Sao Paulo, Luiz de Queiroz Coll Agr, BR-13416000 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Agricultural and Food Chemistry; v. 67, n. 44, p. 12172-12181, NOV 6 2019.
• Citações Web of Science: 0

Resumo

Understanding the mechanisms of absorption and transport of foliar nutrition is a key step towards the development of advanced fertilization methods. This study employed X-ray fluorescence (XRF) and X-ray absorption near edge spectroscopy (XANES) to trace the in vivo absorption and transport of ZnO and ZnSO4 (aq) to soybean leaves (Glycine max). XRF maps monitored over 48 h showed a shape change of the dried ZnSO4 (aq) droplet, indicating Zn2+ absorption. Conversely, these maps did not show short movement of Zn from ZnO. XRF measurements on petioles of leaves that received Zn2+ treatments clarified that the Zn absorption and transport in the form of ZnSO4 (aq) was faster that of ZnO. Solubility was the major factor driving ZnSO4 (aq) absorption. XANES speciation showed that in planta Zn is transported coordinated with organic acids. Because plants demand Zn during their entire lifecycle, the utilization of sources with different solubilities can increase Zn use efficiency. (AU)

• Processo FAPESP: 18/13401-7 - Espectroscopia de raio-X revelando os efeitos do glifosato sobre a absorção foliar de manganês em soja
• Beneficiário: Bianca de Almeida Machado
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• 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