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Genome sequencing reveals mechanisms for heavy metal resistance and polycyclic aromatic hydrocarbon degradation in Delftia lacustris strain LZ-C
Abstract
Strain LZ-C, isolated from a petrochemical wastewater discharge site, was found to be resistant to heavy metals and to degrade various aromatic compounds, including naphenol, naphthalene, 2-methylnaphthalene and toluene. Data obtained from 16S rRNA gene sequencing showed that this strain was closely related to Delftia lacustris. The 5,889,360 bp genome of strain LZ-C was assembled into 239 contigs and 197 scaffolds containing 5855 predicted open reading frames (ORFs). Among these predicted ORFs, 464 were different from the type strain of Delftia. The minimal inhibitory concentrations were 4 mM, 30 µM, 2 mM and 1 mM for Cr(VI), Hg(II), Cd(II) and Pb(II), respectively. Both genome sequencing and quantitative real-time PCR data revealed that genes related to Chr, Czc and Mer family genes play important roles in heavy metal resistance in strain LZ-C. In addition, the Na(+)/H(+) antiporter NhaA is important for adaptation to high salinity resistance (2.5 M NaCl). The complete pathways of benzene and benzoate degradation were identified through KEGG analysis. Interestingly, strain LZ-C also degrades naphthalene but lacks the key naphthalene degradation gene NahA. Thus, we propose that strain LZ-C exhibits a novel protein with a function similar to NahA. This study is the first to reveal the mechanisms of heavy metal resistance and salinity tolerance in D. lacustris and to identify a potential 2-methylnaphthalene degradation protein in this strain. Through whole-genome sequencing an…
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Delftia lacustris LZ-C has shown the ability to degrade hydrocarbons while exhibiting significant resistance to Cr(VI), Hg(II), Cd(II), and Pb(II).
“In addition, Delftia lacustris LZ-C has shown the ability to degrade hydrocarbons while exhibiting significant resistance to Cr(VI), Hg(II), Cd(II), and Pb(II), making it a strong candidate for remediation in metal-polluted areas [381].”
From Harnessing bacterial consortia for effective bioremediation: targeted removal of heavy metals, hydrocarbons, and persistent pollutants (2025) · cites this paper as [381]
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Qattan, S. Y. A. (2025) · Environmental Sciences Europe · doi:10.1186/s12302-025-01103-y · Cited by 109
Metadata
- Authors
- Wu, W., Huang, H., Ling, Z., Yu, Z., Jiang, Y., Liu, P., & Li, X.
- Affiliations
- Lanzhou University (CN)
- Corresponding author
- Li, Xiangkai
- Venue
- Ecotoxicology
- Published
- 2015-11-20
- Volume
- 25
- Issue
- 1
- Pages
- 234-247
- ISSN
- 0963-9292 (ISSN-L)
- 1573-3017
- OpenAlex
- W2180342010
- Cited by
- 72
- References
- 1
- Citations by year
- 2026: 6 · 2025: 8 · 2024: 5 · 2023: 7 · 2022: 8 · 2021: 7 · 2020: 8 · 2019: 10 · 2018: 7 · 2017: 2 · 2016: 4
- FWCI
- 2.50
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Ecotoxicology (publishedVersion)
- PubMed (publishedVersion)
- Lanzhou University Institutional Repository (submittedVersion)
- Funders
- National Natural Science Foundation of China (31470224, 31200085)
- MOST international cooperation (2014DFA91340)
- Gansu Provincial International Cooperation (134WCGA176)
- Topics
- Physical Sciences › Environmental Science › Pollution › Microbial bioremediation and biosurfactants
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Chromium effects and bioremediation
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
- Keywords
- Delftia lacustris, heavy metal resistance, polycyclic aromatic hydrocarbon degradation, naphthalene degradation, salt tolerance, petrochemical wastewater, bioremediation, genome assembly
- MeSH terms
- China, Polycyclic Aromatic Hydrocarbons, Soil Pollutants, Genome, Bacterial, Sequence Analysis, DNA, Metals, Heavy, Delftia, Real-Time Polymerase Chain Reaction
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