Journal ArticleDOI
The Ecology of Arsenic
Ronald S. Oremland,John F. Stolz +1 more
Reads0
Chats0
TLDR
This work reviews what is known about arsenic-metabolizing bacteria and their potential impact on speciation and mobilization of arsenic in nature and investigates their role in aquifers.Abstract:
Arsenic is a metalloid whose name conjures up images of murder. Nonetheless, certain prokaryotes use arsenic oxyanions for energy generation, either by oxidizing arsenite or by respiring arsenate. These microbes are phylogenetically diverse and occur in a wide range of habitats. Arsenic cycling may take place in the absence of oxygen and can contribute to organic matter oxidation. In aquifers, these microbial reactions may mobilize arsenic from the solid to the aqueous phase, resulting in contaminated drinking water. Here we review what is known about arsenic-metabolizing bacteria and their potential impact on speciation and mobilization of arsenic in nature.read more
Citations
More filters
Journal ArticleDOI
Bacteria-Mediated Arsenic Oxidation and Reduction in the Growth Media of Arsenic Hyperaccumulator Pteris vittata
Xin Wang,Bala Rathinasabapathi,Letuzia M. de Oliveira,Luiz Roberto Guimarães Guilherme,Lena Q. Ma +4 more
TL;DR: Arsenic-resistant bacteria with strong AsIII oxidizing ability may have potential to improve bioremediation of AsIII-contaminated water using P. vittata and/or other biochemical strategies.
Journal ArticleDOI
Functional coexistence of twin arsenic resistance systems in Pseudomonas putida KT2440.
TL;DR: Functional redundancy may be selected as a stable condition - rather than just as transient state - if it affords one key activity to be expressed under a wider range of physicochemical settings.
Journal ArticleDOI
Genomic Evidence Reveals the Extreme Diversity and Wide Distribution of the Arsenic-Related Genes in Burkholderiales
TL;DR: Analysis of Burkholderiales genomes found that 95% genomes harbored arsenic-related genes, with an average of 6.6 genes per genome, which indicates that habitat is likely a key driver for bacterial arsenic resistance.
Journal ArticleDOI
Arsenic resistance in Pteris vittata L.: identification of a cytosolic triosephosphate isomerase based on cDNA expression cloning in Escherichia coli.
Bala Rathinasabapathi,Shan Wu,Sabarinath Sundaram,Jean Rivoal,Mrittunjai Srivastava,Lena Q. Ma +5 more
TL;DR: A novel role for P. vittata cTPI in arsenate reduction is highlighted, as bacterial cells expressing fern TPI had significantly greater per cent of cellular arsenic as arsenite compared to cells expressing E. coli TPI.
Journal ArticleDOI
Description of Anaerobacillus alkalilacustre gen. nov., sp. nov.—Strictly anaerobic diazotrophic bacillus isolated from soda lake and transfer of Bacillus arseniciselenatis, Bacillus macyae, and Bacillus alkalidiazotrophicus to Anaerobacillus as the new combinations A. arseniciselenatis comb. nov., A. macyae comb. nov., and A. alkalidiazotrophicus comb. nov.
D. G. Zavarzina,Tatyana P. Tourova,Tatyana V. Kolganova,Eugenia S. Boulygina,Tatyana N. Zhilina +4 more
TL;DR: On the basis of physiological properties and genetic analysis, it is proposed that strain Z-0521T should be assigned to a new species of a new genus, Anaerobacillus alkalilacustre gen. nov, and it is also proposed that Bacillus arseniciselenatis, Bacillus macyae and Bacillus alkalidiazotrophicus should be transferred to this new genus.
References
More filters
Journal ArticleDOI
A review of the source, behaviour and distribution of arsenic in natural waters
TL;DR: The scale of the problem in terms of population exposed to high As concentrations is greatest in the Bengal Basin with more than 40 million people drinking water containing ‘excessive’ As as mentioned in this paper.
Journal ArticleDOI
Worldwide Occurrences of Arsenic in Ground Water
TL;DR: Nordstrom et al. as mentioned in this paper argue that human health risks from arsenic in ground water can be minimized by incorporating hydrogeochemical knowledge into water management decisions and by more careful monitoring for arsenic in geologically high-risk areas.
Journal ArticleDOI
Arsenic poisoning of Bangladesh groundwater
TL;DR: Sedimentological study of the Ganges alluvial sediments shows that the arsenic derives from the reductive dissolution of arsenic-rich iron oxyhydroxides, which in turn are derived from weathering of base-metal sulphides.
Journal ArticleDOI