TABLE 1.
Influence of soil and NH4+ on NO2− production and MeBr oxidation by N. europaea under water-saturated conditions
| MeBr (mM) | Amt (μmol/mg [dry wt] of cells) witha:
|
|||||||
|---|---|---|---|---|---|---|---|---|
| NH4+ (10 mM)b
|
NH4+ (40 mM)c
|
|||||||
| −Soild
|
+Soile
|
−Soil
|
+Soil
|
|||||
| NO2− | MeBr | NO2− | MeBr | NO2− | MeBr | NO2− | MeBr | |
| 0 | 180 (10) | 100 (10) | 220 (20) | 230 (30) | ||||
| 0.12 | 170 (10) | 7.2 (0.4) | 50 (5) | 6.4 (0.4) | 190 (20) | 5.1 (0.5) | 150 (10) | 6.4 (0.6) |
| 0.24 | 130 (10) | 8.0 (0.6) | 30 (3) | 5.1 (0.4) | 170 (10) | 6.8 (0.9) | 110 (10) | 9.6 (0.7) |
| 0.47 | 120 (30) | 12.8 (0.9) | 20 (2) | 5.5 (0.5) | 160 (10) | 7.2 (0.6) | 80 (10) | 9.6 (0.1) |
a
Values in parentheses are the standard errors of the means of three replicates per treatment.
b
50 μmol of NH4+ added per vial, equivalent to 10 μmol of NH4+/ml of buffer plus water or 4.55 μmol of NH4+/g of soil.
c
200 μmol of NH4+ added per vial, equivalent to 40 μmol of NH4+/ml of buffer plus water or 18.2 μmol of NH4+/g of soil.
d
Minus-soil treatments contained 5 ml of buffer plus water per vial.
e
Plus-soil treatments contained the equivalent of 11 g of oven-dried soil and 5 ml of buffer plus water per vial.