The availability of Fe is exceedingly low in alkaline soils due to its immobilization (Römheld and Marschner, 1986). This often becomes a key limiting factor for plant growth and development. Thus, plants that are more tolerant to alkaline stress may equip with efficient systems to mine Fe from soils. To verify this hypothesis, shoot and root Fe concentrations were measured. Under non-stress condition, no striking difference in shoot Fe concentrations was observed between the non-inoculated and inoculated plants (Table 1). However, a marked decrease in shoot Fe concentrations was found in the non-inoculated plants after 2 and 4 weeks of the stress treatment [Table 1; F(5,54) = 57.42, P < 0.05]. Furthermore, shoot Fe concentrations of the inoculated plants were relatively higher than that of the non-inoculated plants. A similarly changing tendency of Fe concentrations was found in roots [Table 1; F(5,54) = 86.68, P < 0.05].