Physiological and Molecular Regulation of Aluminum Resistance in Woody Plant Species

Aluminum (Al) is the main limiting factor for plant growth in acid soils. Woody plant species are well adapted to acid soils with high Al3+ concentration. The external resistance mechanisms comprise Al immobilization in the rhizosphere (Al excluders) and internal ones include complexation of Al in cells (Al accumulators). This chapter provides a critical analysis of the physiological and molecular regulation of Al-resistance mechanisms in woody plant species