Biodegradation of nitro-PAHs by multi-trait PGPR strains isolated directly from rhizosphere soil
Nitrated polycyclic aromatic hydrocarbons (nitro-PAHs) are hazardous, persistent organic pollutants widely distributed globally. They significantly threaten environmental health by degrading soil, water, and air quality. Prolonged exposure to nitro-PAHs increases risks for both humans and wildlife,...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-03-01
|
| Series: | The Microbe |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2950194625000317 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Nitrated polycyclic aromatic hydrocarbons (nitro-PAHs) are hazardous, persistent organic pollutants widely distributed globally. They significantly threaten environmental health by degrading soil, water, and air quality. Prolonged exposure to nitro-PAHs increases risks for both humans and wildlife, leading to cancer, genetic mutations, endocrine disruption, neurodegenerative disorders, and oxidative stress. This study explored the degradation of nitro-PAHs using two plant growth-promoting rhizobacterial (PGPR) strains, Bacillus cereus BG034 and Bacillus altitudinis BG05, isolated from the rhizosphere of native plants (Cyperus rotundus, Cyperus esculentus, Imperata cylindrica, and Axonopus compressus). A co-inoculum (BGC01) formed from these bacterial strains of Bacillus cereus BG034 and Bacillus altitudinis BG05, demonstrated significant capabilities for degrading nitro-PAHs. After a 72-hour incubation period, BGC01 effectively removed 76.0 % of 1-nitropyrene and 87.2 % of 2-nitrofluorene. Individually, Bacillus cereus BG034 removed 47.8 % of 1-nitropyrene and 59.9 % of 2-nitrofluorene, while Bacillus altitudinis BG05 achieved the removal abilities of 49.0 % and 59.8 %. In addition to their degradation capacity, these bacteria exhibited traits that promote plant growth. These results emphasize the potential of these bacterial strains, particularly in co-inoculum form, as effective agents for nitro-PAH degradation. This study offers an environmentally friendly and cost-effective solution for environmental remediation and highlights the potential use of these bacteria as biofertilizers for sustainable agriculture. |
|---|---|
| ISSN: | 2950-1946 |