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

Tipo de publicación

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