TABLE 3.
Concentrations of Fe and pH measured in the microplate solutions after 48 h of interactions between bacterial suspensions and biotitea
| Origin of bacterial isolates | Fe (mg liter−1) |
pH |
||||
|---|---|---|---|---|---|---|
| Oak | Beech | Norway spruce | Oak | Beech | Norway spruce | |
| Bulk soil | 0.28 ± 0.08 | 0.34 ± 0.12 | 0.51 ± 0.16 | 4.33 | 4.22 | 4.10 |
| Ectomycorrhizosphere | 0.75* ± 0.10 | 0.88* ± 0.15 | 0.54 ± 0.14 | 3.77* | 3.69* | 4.19 |
a
Values represent means ± standard deviations for 18 to 20 replicates. In each column, treatments associated with an asterisk are significantly different according to a one-factor (compartment of origin of the bacterial strains) ANOVA (P < 0.05). Under our experimental conditions, no iron was measured in the filtrate of the noninoculated control wells and no modification of the pH was observed.