Table 2.
Tolerance of Gram-positive and Gram-negative bacterial strains to pure and mixture of saturated, monoaromatic and polyaromatic hydrocarbons
| Variant: | log POW1 | Bacterial strains growth on solid medium2with hydrocarbons in vapor phase | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mycobacterium sp. IBBPo1 | Oerskovia sp. IBBPo2 | Corynebacterium sp. IBBPo3 | Chryseomonas sp. IBBPo7 | Pseudomonas sp. IBBPo10 | Burkholderia sp. IBBPo12 | ||||||||
| LBMg | MM | LBMg | MM | LBMg | MM | LBMg | MM | LBMg | MM | LBMg | MM | ||
| Control | - | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% |
| Cyclohexane | 3.35 | 50% | 25% | 75% | 50% | 50% | 25% | 50% | 10% | 75% | 25% | 50% | 25% |
| n-Hexane | 3.86 | 100% | 75% | 100% | 100% | 100% | 100% | 100% | 50% | 75% | 25% | 100% | 75% |
| n-Hexadecane | 9.15 | 100% | 75% | 100% | 100% | 100% | 100% | 100% | 75% | 100% | 75% | 100% | 75% |
| Mixture of saturated hydrocarbon | - | 100% | 75% | 100% | 100% | 100% | 100% | 100% | 75% | 100% | 100% | 100% | 100% |
| Benzene | 2.14 | 25% | 0.01% | 75% | 50% | 25% | 25% | 25% | 10% | 50% | 10% | 25% | 10% |
| Toluene | 2.64 | 25% | 0.01% | 75% | 75% | 50% | 25% | 25% | 10% | 50% | 10% | 50% | 10% |
| Ethylbenzene | 3.17 | 25% | 0.01% | 75% | 75% | 50% | 50% | 25% | 25% | 75% | 50% | 75% | 50% |
| Mixture of monoaromatic hydrocarbons | - | 25% | 0.01% | 75% | 75% | 75% | 50% | 25% | 10% | 50% | 10% | 50% | 25% |
| Naphthalene | 3.31 | 50% | 50% | 75% | 75% | 50% | 50% | 50% | 25% | 50% | 25% | 75% | 50% |
| 2-Methylnaphthalene | 3.81 | 25% | 10% | 50% | 25% | 75% | 75% | 75% | 25% | 75% | 50% | 75% | 75% |
| Fluorene | 4.49 | 75% | 50% | 75% | 75% | 75% | 75% | 75% | 50% | 75% | 25% | 75% | 50% |
| Mixture of polyaromatic hydrocarbons | - | 50% | 50% | 75% | 50% | 75% | 50% | 75% | 75% | 75% | 25% | 50% | 25% |
Legend: 1 = logarithm of the partition coefficient of the hydrocarbons in octanol-water mixture; 2 = the growth on agar medium (LBMg = LB-Mg medium, MM = minimal medium) was estimated by determining the formation of resistant bacterial colonies and the hydrocarbons resistance is represented by the frequency of colony formation, with that observed in the absence of any hydrocarbon taken as 100%.