Figure 6.

Reduction of native Fe(III) phyllosilicate in Shovelers Sink soil (clay size fraction) by G. toluenoxidans strain sa2, followed by oxidation of reduced phyllosilicate by the three Fe(II)-oxidizing isolates with ${\text{NO}}_3^{-}$ as the electron acceptor. (A) 0.5 N HCl-extractable Fe(II); (B) nitrate; (C) nitrite.