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

Anais da Academia Brasileira de Ciências

Berenice K. De Alcântara¹  Daniel Pizzaia¹  Fernando A. Piotto¹  Lucélia Borgo¹  Gilvano E. Brondani¹  Ricardo A. Azevedo¹ 

关键词: aluminum;    eucalypt;    lipid peroxidation;    oxidative stress;    root growth;    alumínio;    eucalipto;    peroxidação lipídica;    estresse oxidativo;    crescimento de raiz;   

DOI  :  10.1590/0001-3765201520140322

来源: SciELO

【 摘 要 】

Lipid peroxidation and root elongation of Eucalyptus grandis × Eucalyptus camaldulensiswere 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.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License