Título
Aluminum induces changes in oxidative burst scavenging enzymes in Coffea arabica L. suspension cells with differential Al tolerance
Autor
SOLEDAD MARIA TERESA HERNANDEZ SOTOMAYOR
Nivel de Acceso
Acceso Abierto
Identificador alterno
doi: http://dx.doi.org/10.1016/j.jinorgbio.2011.09.031
Referencia de publicación
doi: http://dx.doi.org/10.1016/j.jinorgbio.2011.09.031
Referencia de datos
doi: http://dx.doi.org/10.1016/j.jinorgbio.2011.09.031
Resumen o descripción
The accumulation of reactive oxygen species (ROS) and concomitant oxidative stress have been considered deleterious consequences of aluminum toxicity. However, several lines of evidence suggest that ROS can function as important signaling molecules in the plant defense system for protection from abiotic stress and the acquisition of tolerance. The role of ROS-scavenging enzymes was assayed in two different coffee cell suspension lines. We treated L2 (Al-sensitive) and LAMt (Al-tolerant) Coffea arabica suspension cells with 100 μM AlCl3 and observed significant differences in catalase activity between the two cell lines. However, we did not observe any differences in superoxide dismutase or glutathione reductase activity in either cell line following Al treatment. ROS production was diminished in the LAMt cell line. Taken together, these results indicate that aluminum treatment may impair the oxidative stress response in L2 cells but not in LAMt cells. We suggest a possible role for Al-induced oxidative bursts in the signaling pathways that lead to Al resistance and protection from Al toxicity.
Fecha de publicación
22 de noviembre de 2011
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