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Comparative behavior of two gram positive Cr6+ resistant bacterial strains Bacillus aerius S1 and Brevibacterium iodinum S2 under hexavalent chromium stress.

ABSTRACT: Bacillus aerius S1 and Brevibacterium iodinum S2 showed maximum growth at 37?°C and pH 8. B. aerius and B. iodinum could resist Cr6+ upto 30 and 35?mM and biosorption proficiency (q) of B. aerius S1 was 19, 27, 52 and 34?mM/g while for B. iodinum S2, it was 39, 50, 23 and 16?mM/g mM/g after 2, 4, 6 and 8 days of incubation. A pronounced rise in antioxidant enzymes activities was determined in B. aerius S1 i.e. POX (963%), CAT (717%), APOX (699%), SOD (683%), and GST (792%). However, in B. iodinum S2, relatively a minor increase was estimated. A significant GSH increase was determined in B. aerius S1 (364%) and B. iodinum S2 (663%) cultures under 2?mM Cr6+ stress. Pilot scale study demonstrated that both strains could reduce Cr6+ into Cr3+ within 6 days from the original tannery effluent with efficiency of 99%.

SUBMITTER: Elahi A

PROVIDER: S-EPMC6348243 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature

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Comparative behavior of two gram positive Cr6+ resistant bacterial strains Bacillus aerius S1 and Brevibacterium iodinum S2 under hexavalent chromium stress.

Elahi Amina A Rehman Abdul A

Biotechnology reports (Amsterdam, Netherlands) 20190115

Bacillus aerius S1 and Brevibacterium iodinum S2 showed maximum growth at 37 °C and pH 8. B. aerius and B. iodinum could resist Cr6+ upto 30 and 35 mM and biosorption proficiency (q) of B. aerius S1 was 19, 27, 52 and 34 mM/g while for B. iodinum S2, it was 39, 50, 23 and 16 mM/g mM/g after 2, 4, 6 and 8 days of incubation. A pronounced rise in antioxidant enzymes activities was determined in B. aerius S1 i.e. POX (963%), CAT (71 ...[more]

PMID: 30705835

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