Temporal dynamics of the response to Al stress in Eucalyptus grandis × Eucalyptus camaldulensis

Autor(es)

Berenice K. de Alcântara ^[1] ; Daniel Pizzaia ^[2] ; Fernando A. Piotto ^[3] ; Lucélia Borgo ^[4] ; Gilvano E. Brondani ^[5] ; Ricardo A. Azevedo ^[6]

Afiliação do(s) autor(es)

^[1] USP. Escola Superior de Agricultura Luiz de Queiroz - Brasil

^[2] USP. Escola Superior de Agricultura Luiz de Queiroz - Brasil

^[3] USP. Escola Superior de Agricultura Luiz de Queiroz - Brasil

^[4] USP. Escola Superior de Agricultura Luiz de Queiroz - Brasil

^[5] Universidade Federal de Mato Grosso. Faculdade de Engenharia Florestal - Brasil

^[6] USP. Escola Superior de Agricultura Luiz de Queiroz - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Anais da Academia Brasileira de Ciências; v. 87, n. 2, p. 1063-1070, 2015-06-09.

Resumo

Lipid peroxidation and root elongation of Eucalyptus grandis × Eucalyptus camaldulensis were studied under stress conditions in response to aluminum (Al), a metal known to limit agricultural productivity in acidic soils primarily due to reduced root elongation. In Brazil, the Grancam 1277 hybrid (E. grandis × E. camaldulensis) has been planted in the "Cerrado", a region of the country with a wide occurrence of acidic soils. The present study demonstrated that the hybrid exhibited root growth reduction and increased levels of lipid peroxidation after 24h of treatment with 100 µM of Al, which was followed by a reduction in lipid peroxidation levels and the recovery of root elongation after 48h of Al exposure, suggesting a rapid response to the early stressful conditions induced by Al. The understanding of the temporal dynamics of Al tolerance may be useful for selecting more tolerant genotypes and for identifying genes of interest for applications in bioengineering. (AU)

• Processo FAPESP: 09/54676-0 - Estresse oxidativo induzido por metais: novas abordagens
• Beneficiário: Ricardo Antunes de Azevedo
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 10/50497-0 - Alteracoes na expressao de genes para lignina e tolerancia induzida ao estresse com ai3+ em uma linhagem de milho.
• Beneficiário: Berenice Kussumoto de Alcântara da Silva
• Modalidade de apoio: Bolsas no Brasil - Doutorado