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,...
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Elsevier
2025-03-01
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| Series: | The Microbe |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2950194625000317 |
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| author | Bhoirob Gogoi Nazim Forid Islam Hemen Sarma |
| author_facet | Bhoirob Gogoi Nazim Forid Islam Hemen Sarma |
| author_sort | Bhoirob Gogoi |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-2cf05a886c3d49c1b4fbde5b83127ad0 |
| institution | Kabale University |
| issn | 2950-1946 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | The Microbe |
| spelling | doaj-art-2cf05a886c3d49c1b4fbde5b83127ad02025-08-20T03:42:56ZengElsevierThe Microbe2950-19462025-03-01610026310.1016/j.microb.2025.100263Biodegradation of nitro-PAHs by multi-trait PGPR strains isolated directly from rhizosphere soilBhoirob Gogoi0Nazim Forid Islam1Hemen Sarma2Bioremediation Technology Research Group, Department of Botany, Bodoland University, Kokrajhar (BTR), Assam, IndiaInstitutional Biotech Hub, Department of Botany, N.N. Saikia College, Titabar, Assam, IndiaBioremediation Technology Research Group, Department of Botany, Bodoland University, Kokrajhar (BTR), Assam, India; Corresponding author.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.http://www.sciencedirect.com/science/article/pii/S2950194625000317Hazardous pollutantsNitro-PAHs1-nitropyrene2-nitrofluoreneBioremediationCo-inoculum |
| spellingShingle | Bhoirob Gogoi Nazim Forid Islam Hemen Sarma Biodegradation of nitro-PAHs by multi-trait PGPR strains isolated directly from rhizosphere soil The Microbe Hazardous pollutants Nitro-PAHs 1-nitropyrene 2-nitrofluorene Bioremediation Co-inoculum |
| title | Biodegradation of nitro-PAHs by multi-trait PGPR strains isolated directly from rhizosphere soil |
| title_full | Biodegradation of nitro-PAHs by multi-trait PGPR strains isolated directly from rhizosphere soil |
| title_fullStr | Biodegradation of nitro-PAHs by multi-trait PGPR strains isolated directly from rhizosphere soil |
| title_full_unstemmed | Biodegradation of nitro-PAHs by multi-trait PGPR strains isolated directly from rhizosphere soil |
| title_short | Biodegradation of nitro-PAHs by multi-trait PGPR strains isolated directly from rhizosphere soil |
| title_sort | biodegradation of nitro pahs by multi trait pgpr strains isolated directly from rhizosphere soil |
| topic | Hazardous pollutants Nitro-PAHs 1-nitropyrene 2-nitrofluorene Bioremediation Co-inoculum |
| url | http://www.sciencedirect.com/science/article/pii/S2950194625000317 |
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