| Texto completo | |
| Autor(es): |
Freitas, Marcella N.
[1]
;
Guerra, Marcelo Braga Bueno
[2, 3]
;
Adame, Andressa
[3]
;
Moraes, Thiago F.
[4]
;
Junior, Jose Lavres
[5]
;
Perez, Carlos A.
[6]
;
Abdala, Dalton B.
[6]
;
Cicero, Silvio M.
[1]
Número total de Autores: 8
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Luiz Queiroz Coll Agr Esalq, Dept Crop Sci, BR-13418900 Sao Paulo, SP - Brazil
[2] Fed Univ Lavras UFLA, Dept Chem, Campus Univ, BR-37200900 Lavras, MG - Brazil
[3] Univ Sao Paulo, Ctr Nucl Energy Agr CENA, Lab Analyt Chem, BR-13416000 Sao Paulo, SP - Brazil
[4] Fed Univ Uberlandia UFU, Lab Elect, BR-38400902 Uberlandia, MG - Brazil
[5] Univ Sao Paulo, Ctr Nucl Energy Agr CENA, Lab Mineral Nutr Plants, BR-13416000 Sao Paulo, SP - Brazil
[6] Natl Ctr Res Energy & Mat CNPEM, Brazilian Synchrotron Light Lab LNLS, BR-13083970 Sao Paulo, SP - Brazil
Número total de Afiliações: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Analytical Atomic Spectrometry; v. 35, n. 12, p. 3021-3031, DEC 1 2020. |
| Citações Web of Science: | 1 |
| Resumo | |
An adequate concentration of zinc in seeds can help in the initial development of plants. ZnO-coating can provide this nutrient to plants from the early stages of growth. However, there is a pressing need for additional studies to enable its safe use. This study aimed to evaluate the elemental distribution over ZnO-treated maize seeds stored for up to 12 months, as well as to map Zn species in the internal seed tissues. Synchrotron radiation micro-X-ray fluorescence spectrometry (SR mu-XRF) and micro-X-ray absorption near-edge spectroscopy (mu-XANES) were used as analytical tools for this purpose. The highest Zn accumulation site in micro-sized ZnO treated maize seeds is the embryo, mainly close to the black layer. The distribution pattern of Zn, S and P does not change in maize seeds treated with ZnO. Zn mass fractions in the embryo, pericarp and endosperm suggest that after 12 months of storage, Zn absorption is observed in ZnO-treated seeds. In the Zn hotspot, this element is in the form of phytate and in more readily bioavailable forms, such as Zn-3(PO4)(2) and cysteine. These findings can yield valuable insights into the advantages of using advanced microanalytical tools to provide important information regarding potential nutrient bioavailability to those interested in biofortification studies. (AU) | |
| Processo FAPESP: | 13/22092-4 - Tratamento de sementes de milho com zinco: avaliações do potencial fisiológico, da produção e do valor nutricional dos grãos |
| Beneficiário: | Marcella Nunes de Freitas |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 12/16203-5 - Estratégias para análise direta de folhas de cana-de-açúcar por espectrometria de emissão óptica com plasma induzido por laser (LIBS) |
| Beneficiário: | Marcelo Braga Bueno Guerra |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |