PDF
Full
Outline
[Objective] To investigate the structural characteristics of microbial consortia in different concentrations of petroleum hydrocarbons, cultivate efficient petroleum hydrocarbon-degrading microbial consortia, and mine the strain resources capable of degrading petroleum hydrocarbons. [Methods] We used 0# diesel as the sole carbon source to domesticate oil-contaminated soil samples through five successive generations by gradually increasing the 0# diesel concentration. The structural changes of microbial consortia were uncovered by 16S rRNA gene amplicon sequencing. The strains with petroleum hydrocarbon-degrading potential were isolated and purified via dilution plating and streaking. Finally, the improved 2,6-dichlorophenol indophenol (DCPIP) cultivation system was employed to identify efficient degrading strains. [Results] During domestication, when the concentration of 0# diesel was raised to 7 000 mg/L, the relative abundance of petroleum hydrocarbon-degrading bacteria including Bacteroidota and Bacillota significantly increased. A total of 58 bacterial strains belonging to 25 genera, 22 families of 4 phyla were isolated, including 31 (53.45%) strains of Pseudomonadota, 13 (22.41%) strains of Actinomycetota, 11 (18.97%) strains of Bacillota, and 3 (5.17%) strains of Bacteroidota. From the isolated strains, 18 petroleum hydrocarbon-degrading strains were screened out. [Conclusion] Through gradient domestication, seven natural microbial consortia were successfully enriched, achieving over 70% degradation of petroleum hydrocarbons at 7 000 mg/L of 0# diesel. Amplicon sequencing revealed that varying 0# diesel concentrations altered the microbial consortium structure. Additionally, 18 strains capable of using 0# diesel as the sole carbon source were identified, providing potential microbial resources for the bioremediation of oil-contaminated soil.
PDF
169
59
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
