Table 2. Dioxygenase Gene Copy Number per gram of Wet Soil for Every Duplicate DNA Extraction Sample, for Unamended and AC-Amended Soils at Different Time Points.
model organism |
Mycobacterium vanbaalenii |
Rhodococcus jostii RHA1 |
Rhodococcus erythropolis |
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targeted genes |
phdA, pdoA2 |
ebdA1, etbA1, akbA1b |
ipbA1, bphA1 |
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soil | time | sample | gene copy n/g wet soil | average | gene copy n/g wet soil | average | gene copy n/g wet soil | average |
Unamended | 0 | DNA1 | 1.18 ± 0.13 × 107 | 13.9 ± 1.5 × 106 | 3.76 ± 0.35 × 107 | 37.2 ± 5.1 × 106 | 1.95 ± 0.70 × 106 | 2.39 ± 0.48 × 106 |
DNA2 | 1.60 ± 0.17 × 107 | 3.69 ± 0.68 × 107 | 2.83 ± 0.23 × 106 | |||||
6 mths | DNA1 | 3.11 ± 0.42 × 106 | 3.1 ± 0.3 × 106 | 8.45 ± 0.04 × 107 | 77.8 ± 4.0 × 106 | 2.85 ± 0.33 × 106 | 2.77 ± 0.55 × 106 | |
DNA2 | 3.11 ± 0.15 × 106 | 7.12 ± 0.74 × 107 | 2.69 ± 0.78 × 106 | |||||
3 yrs | DNA1 | 3.12 ± 0.44 × 106 | 3.3 ± 0.3 × 106 | 1.20 ± 0.09 × 108 | 119.0 ± 10.0 × 106 | 7.85 ± 0.85 × 105 | 0.71 ± 0.06 × 106 | |
DNA2 | 3.45 ± 0.21 × 106 | 1.17 ± 0.10 × 108 | 6.43 ± 0.40 × 105 | |||||
PAC | 0 | DNA1 | 1.98 ± 0.31 × 107 | 18.3 ± 1.8 × 106 | 4.43 ± 0.54 × 107 | 44.0 ± 4.5 × 106 | 2.72 ± 0.26 × 106 | 2.49 ± 0.39 × 106 |
DNA2 | 1.69 ± 0.04 × 107 | 4.38 ± 0.36 × 107 | 2.26 ± 0.52 × 106 | |||||
6 mths | DNA1 | 3.60 ± 0.20 × 106 | 3.6 ± 0.5 × 106 | 7.75 ± 0.99 × 107 | 77.8 ± 8.8 × 106 | 6.34 ± 0.80 × 106 | 6.79 ± 0.61 × 106 | |
DNA2 | 3.51 ± 0.70 × 106 | 7.80 ± 0.77 × 107 | 7.24 ± 0.42 × 106 | |||||
3 yrs | DNA1 | 4.47 ± 0.90 × 106 | 4.9 ± 0.6 × 106 | 1.79 ± 0.17 × 108 | 175.0 ± 10.0 × 106 | 1.55 ± 0.08 × 106 | 1.31 ± 0.05 × 106 | |
DNA2 | 5.22 ± 0.26 × 106 | 1.71 ± 0.04 × 108 | 1.07 ± 0.03 × 106 | |||||
GAC | 0 | DNA1 | 9.48 ± 0.40 × 106 | 10.4 ± 0.6 × 106 | 3.37 ± 0.12 × 107 | 34.7 ± 4.4 × 106 | 1.37 ± 0.30 × 106 | 1.57 ± 0.25 × 106 |
DNA2 | 1.13 ± 0.90 × 107 | 3.57 ± 0.76 × 107 | 1.78 ± 0.22 × 106 | |||||
6 mths | DNA1 | 2.56 ± 0.81 × 106 | 2.5 ± 0.6 × 106 | 8.43 ± 0.13 × 107 | 79.6 ± 8.5 × 106 | 2.50 ± 0.16 × 106 | 2.37 ± 0.22 × 106 | |
DNA2 | 2.45 ± 0.38 × 106 | 7.49 ± 0.43 × 107 | 2.23 ± 0.28 × 106 | |||||
3 yrs | DNA1 | 5.29 ± 0.90 × 106 | 5.7 ± 0.8 × 106 | 1.72 ± 0.23 × 108 | 177.0 ± 17.0 × 106 | 4.79 ± 0.32 × 105 | 0.67 ± 0.20 × 106 | |
DNA2 | 6.12 ± 0.63 × 106 | 1.82 ± 0.13 × 108 | 8.76 ± 0.07 × 105 |
Each quantification was performed in triplicate real-time PCR runs. phdA: iron–sulfur protein large subunit; pdoA2: putative PAH ring-hydroxylating dioxygenase large subunit; etbA1/ebdA1: ethylbenzene dioxygenase alpha subunit; akbA1b: alkylbenzene dioxygenase; ipbA1: isopropylbenzene-2,3-dioxygenase iron-sulphur protein subunit; bphA1: large subunit of biphenyl dioxygenase