title: Temporal dynamics of the response to Al stress in Eucalyptus grandis × Eucalyptus camaldulensis.
abstract: 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 48 h 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.
authors.affiliation: Escola Superior de Agricultura Luiz de Queiroz, USP, Piracicaba, SP, Brasil.
authors.forename: Berenice K de
authors.initials: BK
authors.lastname: Alcântara
authors.affiliation: Escola Superior de Agricultura Luiz de Queiroz, USP, Piracicaba, SP, Brasil.
authors.forename: Daniel
authors.initials: D
authors.lastname: Pizzaia
authors.affiliation: Escola Superior de Agricultura Luiz de Queiroz, USP, Piracicaba, SP, Brasil.
authors.forename: Fernando A
authors.initials: FA
authors.lastname: Piotto
authors.affiliation: Escola Superior de Agricultura Luiz de Queiroz, USP, Piracicaba, SP, Brasil.
authors.forename: Lucélia
authors.initials: L
authors.lastname: Borgo
authors.affiliation: Faculdade de Engenharia Florestal, Universidade Federal de Mato Grosso, Cuiabá, MT, Brasil.
authors.forename: Gilvano E
authors.initials: GE
authors.lastname: Brondani
authors.affiliation: Escola Superior de Agricultura Luiz de Queiroz, USP, Piracicaba, SP, Brasil.
authors.forename: Ricardo A
authors.initials: RA
authors.lastname: Azevedo
mesh_terms: D000535:Aluminum / Q000633:toxicity*; D005052:Eucalyptus / Q000187:drug effects* / Q000254:growth & development; D015227:Lipid Peroxidation / Q000187:drug effects; D018384:Oxidative Stress / Q000187:drug effects; D018517:Plant Roots / Q000187:drug effects* / Q000254:growth & development; D018520:Plant Shoots / Q000187:drug effects* / Q000254:growth & development; D012987:Soil / Q000737:chemistry; D013997:Time Factors
chemical_list: D012987:Soil; D000535:Aluminum