| Texto completo | |
| Autor(es): |
de Freitas, Lucas Barbosa
[1]
;
Fernandes, Dirceu Maximino
[2]
;
Mendonca Maia, Suelen Cristina
[3]
;
Fernandes, Adalton Mazetti
[4]
Número total de Autores: 4
|
| Afiliação do(s) autor(es): | [1] Fac La Salle, Univ Ave, 1000 W, BR-78455000 Lucas Rio Do Verde - Brazil
[2] Sao Paulo State Univ UNESP, Dept Soil & Environm Resources, Coll Agr Sci, Jose Barbosa Barros St 1780, BR-18610307 Botucatu, SP - Brazil
[3] Goiano Fed Inst IF Goiano, Adv Campus Cristalina, Araguaia St, POB 166, BR-73850000 Cristalina - Brazil
[4] Sao Paulo StateUnivers UNESP, Ctr Trop Roots & Starches, Jose Barbosa Barros St 1780, BR-17801861 Botucatu, SP - Brazil
Número total de Afiliações: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PLANT AND SOIL; v. 420, n. 1-2, p. 263-275, NOV 2017. |
| Citações Web of Science: | 5 |
| Resumo | |
This study aimed to determine the capacity of Si to mitigate Al toxicity in upland rice plants (Oryza sativa L.) by evaluating plant growth and the Si and Al uptake kinetics. Plants were grown for 40 days, after which the Si and Al uptake kinetics (Cmin, Km and Imax) were analyzed. Then, the shoots and roots were separated, and the dry matter, root morphology and Si and Al concentration and accumulation in the plant were evaluated. Aluminum decreased plant growth and the Si uptake capacity by decreasing the root growth and Si transport system efficiency in the upland rice roots (> Km and > Cmin). Silicon mitigated Al toxicity in the upland rice plants by decreasing Al transport to the plant shoots, although it did not reduce the Al uptake rate (Imax). Si treatment increased the growth of upland rice plant shoots grown in the presence of Al without influencing the root growth. The alleviation of Al toxicity by Si is more evident in the susceptible upland rice cultivar Maravilha. Silicon mitigated Al toxicity in the upland rice plants by decreasing Al transport to the plant shoots but did not reduce the Al uptake rate by roots. (AU) | |
| Processo FAPESP: | 11/09283-0 - Interação silício e alumínio em plantas de arroz de terras altas e mamona |
| Beneficiário: | Lucas Barbosa de Freitas |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 11/22182-8 - Interação silício e alumínio em plantas de arroz de terras altas e mamona |
| Beneficiário: | Dirceu Maximino Fernandes |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |