Table 2 Detection and enumeration of atrazine-degrading bacteria in soils
Sampling site | Soila | Min-max population densities, CFU g−1 of dry soil | Percentage of atrazine degraders in the culturable population | |
|---|---|---|---|---|
Culturable bacteria on TY agar | Atrazine-degrading bacteria on SM agar | |||
D3 | I, B | 5.8 × 108–6.4 × 108 | 2.9 × 107–3.5 × 107 | 4.5–6.0 % |
D5 | I, B | 8.2 × 106–8.6 × 106 | 1.6 × 106–2.4 × 106 | 18.6–29.3 % |
I, R | 8.8 × 107–1.2 × 108 | 1.1 × 107–2.9 × 107 | 9.1–33.0 % | |
D6 | I, B | 1.6 × 107–2.0 × 107 | 5.7 × 104–7.4 × 104 | 0.29–0.46 % |
I, R | 6.1 × 108–9.9 × 108 | 3.6 × 105–2.2 × 106 | 0.05–0.23 % | |
TD(a) | A, R | 6.5 × 108–9.9 × 108 | 1.3 × 103–1.3 × 104 | 0.0002–0.0014 % |
TD(b) | A, R | NEb | 1.8 × 103–5.2 × 103 | NE |
DnW | A, R | NE | 1.3 × 103–2.8 × 103 | NE |
DnL | A, R | NE | 8.0 × 102–4.5 × 103 | NE |
GD | A, R | 4.8 × 108–7.9 × 108 | 1.4 × 104–7.5 × 104 | 0.0035–0.0095 % |
WS | A, R | NE | 3.0 × 102–2.0 × 103 | NE |