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Arsenic efflux in Enterobacter cloacae RSN3 isolated from arsenic-rich soil
B. Dash, N. Sahu, AK. Singh, SB. Gupta, R. Soni
Jazyk angličtina Země Spojené státy americké
Typ dokumentu časopisecké články
- MeSH
- Achromobacter MeSH
- arsen * MeSH
- Brevibacterium MeSH
- Enterobacter cloacae genetika MeSH
- látky znečišťující půdu * MeSH
- Ochrobactrum MeSH
- půda MeSH
- RNA ribozomální 16S genetika MeSH
- Stenotrophomonas MeSH
- Publikační typ
- časopisecké články MeSH
In the present study, bacterial isolates were screened for arsenic resistance efficiency. Environmental isolates were isolated from arsenic-rich soil samples (i.e., from Rajnandgaon district of Chhattisgarh state, India). Amplification and sequencing of 16S rRNA gene revealed that the isolates were of Bacillus firmus RSN1, Brevibacterium senegalense RSN2, Enterobacter cloacae RSN3, Stenotrophomonas pavanii RSN6, Achromobacter mucicolens RSN7, and Ochrobactrum intermedium RSN10. Arsenite efflux gene (arsB) was successfully amplified in E. cloacae RSN3. Atomic absorption spectroscopy (AAS) analysis showed an absorption of 32.22% arsenic by the RSN3 strain. Furthermore, results of scanning electron microscopy (SEM) for morphological variations revealed an initial increase in the cell size at 1 mM sodium arsenate; however, it was decreased at 10 mM concentration in comparison to control. This change of the cell size in different metal concentrations was due to the uptake and expulsion of the metal from the cell, which also confirmed the arsenite efflux system.
Citace poskytuje Crossref.org
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