期刊
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
卷 87, 期 2, 页码 1063-1070出版社
ACAD BRASILEIRA DE CIENCIAS
DOI: 10.1590/0001-3765201520140322
关键词
aluminum; eucalypt; lipid peroxidation; oxidative stress; root growth
资金
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (Fapesp) [2009/54676-0, 2010/50497-0]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq-Brazil)
Lipid peroxidation and root elongation of Eucalyptus grandis x 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 x 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 mu M 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.
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