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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Hong, Qing Chen, Chen Zhang, Zhou Luo, Chunling Zhang, Jianan Chen, Yahua Lei, Wenrui Lu, Min Shen, Zhenguo |
| Description | Author Affiliation: Chen C ( College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China.); Lei W ( College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China.); Lu M ( College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China.); Zhang J ( College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China.); Zhang Z ( College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China.); Luo C ( State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, People's Republic of China.); Chen Y ( College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China.); Hong Q ( College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China.); Shen Z ( College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China. zgsheng@njau.edu.cn.) |
| Abstract | Soil that is co-contaminated with heavy metals (HMs) and polycyclic aromatic hydrocarbons (PAHs) is difficult to bioremediate due to the ability of toxic metals to inhibit PAH degradation by bacteria. We demonstrated the resistance mechanisms to Cu(II) and Cd(II) of two newly isolated strains of Sphingobium sp. PHE-SPH and Ochrobactrum sp. PHE-OCH and further tested their potential application in the bioremediation of HM-phenanthrene (PhA) co-contaminated sites. The PHE-SPH and PHE-OCH strains tolerated 4.63 and 4.34 mM Cu(II) and also showed tolerance to 0.48 and 1.52 mM Cd(II), respectively. Diverse resistance patterns were detected between the two strains. In PHE-OCH cells, the maximum accumulation of Cu(II) occurred in the cell wall, while the maximum accumulation was in the cytoplasm of PHE-SPH cells. This resulted in a sudden suppression of growth in PHE-OCH and a gradual inhibition in PHE-SPH as the concentration of Cu(II) increased. Organic acid production was markedly higher in PHE-OCH than in PHE-SPH, which may also have a role in the resistance mechanisms, and contributes to the higher Cd(II) tolerance of PHE-OCH. The factors involved in the absorption of Cu(II) or Cd(II) in PHE-SPH and PHE-OCH were identified as proteins and carbohydrates by Fourier transform infrared (FT-IR) spectroscopy. Furthermore, both strains showed the ability to efficiently degrade PhA and maintained this high degradation efficiency under HM stress. The high tolerance to HMs and the PhA degradation capacity make Sphingobium sp. PHE-SPH and Ochrobactrum sp. PHE-OCH excellent candidate organisms for the bioremediation of HM-PhA co-contaminated sites. |
| ISSN | 09441344 |
| Issue Number | 7 |
| Journal | Environmental Science and Pollution Research |
| Volume Number | 23 |
| e-ISSN | 16147499 |
| Language | English |
| Publisher | Springer |
| Publisher Date | 2016-04-01 |
| Publisher Place | Germany |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Environmental Science Discipline Environmental Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine |
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