TABLE 1.
Sampling mo | Successional age (yr) | DNA yield (μg g−1 of soil) | No. of gene copies (ng−1 of DNA)
|
||||
---|---|---|---|---|---|---|---|
16S rRNA | narG | nirK | nirS | nosZ | |||
August | 25 | 7.92 A | 5.1 × 105 A | 2.3 × 104 A | 1.1 × 103 A | 2.9 × 103 A | 1.8 × 103 A |
40 | 8.04 A | 8.9 × 105 A | 2.1 × 104 A | 1.4 × 103 A | 2.9 × 103 A | 4.7 × 103 A | |
44 | 22.41 A | 7.5 × 105 A | 6.4 × 103 B | 9.1 × 102 A | 4.1 × 103 A | 2.0 × 103 A | |
72 | 24.89 A | 6.6 × 105 A | 3.3 × 103 B | 1.3 × 103 A | 2.5 × 102 A | 4.8 × 103 A | |
129 | 64.54 B | 6.3 × 105 A | 2.1 × 103 B | 9.5 × 102 A | 5.7 × 102 A | 4.7 × 103 A | |
September | 25 | 7.81 A | 5.5 × 105 A | 2.6 × 104 A | 1.2 × 103 A | 6.4 × 103 A | 1.7 × 103 AB |
40 | 9.15 A | 6.9 × 105 A | 2.1 × 104 B | 1.1 × 103 A | 2.7 × 103 B | 5.5 × 103 D | |
44 | 18.15 A | 5.4 × 105 A | 7.3 × 103 C | 7.4 × 102 B | 2.4 × 103 B | 1.2 × 103 A | |
72 | 22.24 A | 5.7 × 105 A | 7.2 × 103 C | 1.2 × 103 A | 1.4 × 103 B | 3.7 × 103 C | |
129 | 45.27 B | 4.9 × 105 A | 2.9 × 103 C | 7.6 × 102 B | 1.8 × 103 B | 3.2 × 103 BC |
Suffix letters (A to D) indicate significant differences between successional stages.