TABLE 3.
Degradative capacities of Azoarcus strains isolated from groundwater
| Strain | Cold test resulta
|
MRb (%) | ||||
|---|---|---|---|---|---|---|
| Benzene | Toluene | o-Xylene | m-Xylene | p-Xylene | ||
| DN11 | + | ++ | − | ++ | − | 102 ± 19 |
| DN15 | − | ++ | − | ++ | − | NA |
| DN47 | − | ++ | − | ++ | − | NA |
| AN9 | + | ++ | − | ++ | − | 72 ± 14 |
| AN21 | − | − | − | − | − | 3.7 ± 4.4 |
a
−, no substantial degradation was observed after 30 days; +, 20% to 90% of the amended substrate was degraded; ++, >90% of the substrate was degraded.
b
MR of benzene, determined by a radiorespirometry experiment as described in the text. Data are means ± standard deviations (n = 3). NA, not analyzed.