| Texto completo | |
| Autor(es): |
Lopes Junior, Cicero Alves
[1, 2, 3]
;
Oliveira, Silvana Ruella
[1, 2]
;
Mazzafera, Paulo
[4]
;
Zezzi Arruda, Marco Aurelio
[1, 2]
Número total de Autores: 4
|
| Afiliação do(s) autor(es): | [1] Univ Campinas Unicamp, Inst Chem, Dept Analyt Chem, Spectrometry Sample Preparat & Mechanizat Grp GEP, POB 6154, BR-13083970 Campinas, SP - Brazil
[2] Univ Campinas Unicamp, Inst Chem, Dept Analyt Chem, Natl Inst Sci & Technol Bioanalyt INCTBio, POB 6154, BR-13083970 Campinas, SP - Brazil
[3] Fed Univ Piaui UFPI, Dept Chem, POB 64049-550, Teresina, PI - Brazil
[4] State Univ Campinas Unicamp, Inst Biol, Dept Plant Biol, POB 6109, BR-13083970 Campinas, SP - Brazil
Número total de Afiliações: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ENVIRONMENTAL AND EXPERIMENTAL BOTANY; v. 125, p. 87-97, MAY 2016. |
| Citações Web of Science: | 5 |
| Resumo | |
The present study evaluates the effects of different doses of cadmium (0, 50, 350 and 700 mg) on sunflower seeds, thus expanding the information available on this plant culture. For this task, the interaction between cadmium and key elements such as Cu, Fe, Mg, Mn, P, S and Zn is evaluated. An in vitro procedure is also performed to assess the cadmium bioavailability and bioaccessibility. Finally, metallobiomolecules are evaluated by SEC-ICP-MS in the seeds. The results indicated that cadmium is translocated to seeds such that the level of this element in the seeds was 130 times higher than the tolerable amount for the human body (0.1 mg kg(-1)). An imbalance of other metals is also detected. While 92%, 72% and 74% of cadmium is bioaccessible in the control, Cd-low (50 mg Cd) and Cd-high (700 mg Cd) groups, respectively, its bioavailability was markedly different, with only 6.5%, 2% and 1% bioavailable from the same groups, respectively. This behavior reflects on the bioaccessibility and bioavailability of other elements also evaluated. In terms of metallobiomolecules, cadmium greatly interferes with Fe-biomolecules synthesis. Finally, cadmium interferes with the seed germination (2nd generation of seeds), by increasing the dormancy time (ca. 50% higher) and by decreasing the germination rate (ca. 60% lower) compared with the control group. (C) 2016 Elsevier B.V. All rights reserved. (AU) | |
| Processo FAPESP: | 12/21344-7 - Estudos metalômicos aplicados a espécies geneticamente modificadas de soja [Glycine max (L.) Merrill] e Arabidopsis thaliana |
| Beneficiário: | Marco Aurelio Zezzi Arruda |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |