Mechanism of arsenic resistance in endophytic bacteria isolated from endemic plant of mine tailings and their arsenophore production

Archives of Microbiology
Brenda Román-PonceEn Tao Wang

Abstract

Arsenic contamination is an important environmental problem around the world since its high toxicity, and bacteria resist to this element serve as valuable resource for its bioremediation. Aiming at searching the arsenic-resistant bacteria and determining their resistant mechanism, a total of 27 strains isolated from roots of Prosopis laevigata and Spharealcea angustifolia grown in a heavy metal-contaminated region in Mexico were investigated. The minimum inhibitory concentration (MIC) and transformation abilities of arsenate (As5+) and arsenite (As3+), arsenophore synthesis, arsenate uptake, and cytoplasmatic arsenate reductase (arsC), and arsenite transporter (arsB) genes were studied for these strains. Based on these results and the 16S rDNA sequence analysis, these isolates were identified as arsenic-resistant endophytic bacteria (AREB) belonging to the genera Arthrobacter, Bacillus, Brevibacterium, Kocuria, Microbacterium, Micrococcus, Pseudomonas, and Staphylococcus. They could tolerate high concentrations of arsenic with MIC from 20 to > 100 mM for As5+ and 10-20 mM for As3+. Eleven isolates presented dual abilities of As5+ reduction and As3+ oxidation. As the most effective strains, Micrococcus luteus NE2E1 reduced 94% ...Continue Reading

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Citations

Nov 5, 2019·Journal of Basic Microbiology·Zeeshanur RahmanVed P Singh
Jul 1, 2019·Archives of Microbiology·Tania Zacaria VitalEn Tao Wang
Jan 26, 2021·Archives of Microbiology·Ivan Arroyo-HerreraMaría Soledad Vásquez-Murrieta
Aug 10, 2021·Frontiers in Plant Science·Hazhir TashanAbdolbaset Azizi
Dec 4, 2021·Environmental Science and Pollution Research International·Philippe N BertinMichel Mench

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Datasets Mentioned

BETA
DSM11031

Methods Mentioned

BETA
PCR

Software Mentioned

R package Core
Macrogen
BLAST
SEAVIEW
CLUSTAL X
MatGAT

Related Concepts

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