As(V)-reduction to As(III) by arsenic-resistant<i>Bacillus</i>spp. bacterial strains isolated from low-contaminated sediments of the Oliveri-Tindari Lagoon, Italy

Ruta, Marcella; Pepi, Milva; Gaggi, Carlo; Bernardini, E.; Focardi, S.; Magaldi, Eleonora; Gasperini, Simone; Volterrani, Maurizio; Zanini, A.; Focardi, Silvano

doi:10.1080/02757540.2010.547490

Cited by 11 publications

(11 citation statements)

References 30 publications

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“…; Ruta et al . ). The As(V) concentration of As resistance even exceeds 1000 mmol l −1 in Chile (Escalante et al .…”

Section: Discussionmentioning

confidence: 97%

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Bacillussp. SXB andPantoeasp. IMH, aerobic As(V)-reducing bacteria isolated from arsenic-contaminated soil

Zhuang

et al. 2012

J Appl Microbiol

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Aims: To isolate highly effective aerobic As(V)-reducing bacteria from arsenic (As)-contaminated soils in Northwest China and to identify their dynamic As (V) reduction processes and genomic detoxification mechanisms. Methods and Results: Enrichment cultures were performed aerobically in tryptone, yeast extract and glucose medium in the presence of As(V). Strain SXB isolated from soil in Shanxi Province, belonging to Bacillus genus, reduced As(V) more effectively under aerobic conditions than under anaerobic conditions. Strain IMH, a strictly aerobic isolate obtained from soil in Inner Mongolia, identified as Pantoea, is reported for the first time to reduce As(V). Both isolates could reduce over 90% As(V) in 36 h under aerobic conditions. Putative gene fragments for the ArsB efflux pump gene were obtained from both strains. The putative arsenate reductase gene was only amplified from strain SXB. A putative arsH gene was amplified from strain IMH. Conclusions: Strains SXB and IMH isolated from the As-contaminated soils reduce As(V) effectively under aerobic conditions via a detoxification mechanism regulated by ars operons. Significance and Impact of the Study: Pantoea genus is reported to reduce As (V) for the first time. This study provides a full understanding of the highly effective As(V)-reducing bacteria SXB and IMH, which could influence the As biogeochemical cycle in soils.

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“…; Ruta et al . ). The As(V) concentration of As resistance even exceeds 1000 mmol l −1 in Chile (Escalante et al .…”

Section: Discussionmentioning

confidence: 97%

“…The bacteria belonging to Bacillus have been isolated from sediments in Italy (Ruta et al . ) and agricultural soils in Bangladesh (Bachate et al . ).…”

Section: Discussionmentioning

confidence: 99%

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Bacillussp. SXB andPantoeasp. IMH, aerobic As(V)-reducing bacteria isolated from arsenic-contaminated soil

Zhuang

et al. 2012

J Appl Microbiol

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“…In addition, the data analysis identified that the bacterial genus Bacillus was positively related to the increased levels of the heavy metals in the soil. In fact, the As‐resistant Bacillus strains have been shown to reduce As(V) to As(III) (Ruta et al., ). In order to delineate the importance of different evolutionary processes (lateral gene transfer, selective survival of heavy metal resistant populations, accumulation adaptive mutations) in mediating the response of a soil microbial community to heavy metal contamination, amplicon‐based sequencing should be combined with single‐cell, gene, and genome‐centric metagenomic sequencing (Hemme et al., ; Starnawski et al., ).…”

Section: Discussionmentioning

confidence: 99%

“…In addition, the data analysis identified that the bacterial genus Bacillus was positively related to the increased levels of the heavy metals in the soil. In fact, the As-resistant Bacillus strains have been shown to reduce As(V) to As(III) (Ruta et al, 2011). In order to delineate the importance of different evolutionary processes (lateral gene transfer, selective F I G U R E 3 Heatmap showing the clustering of soil samples based on the relative percentage of 16S rRNA gene sequences assigned to 50 most abundant genera.…”

Section: Discussionmentioning

confidence: 99%

The bacterial community structure and functional profile in the heavy metal contaminated paddy soils, surrounding a nonferrous smelter in South Korea

Tipayno

Truu

Samaddar

et al. 2018

Ecology and Evolution

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The pollution of agricultural soils by the heavy metals affects the productivity of the land and has an impact on the quality of the surrounding ecosystems. This study investigated the bacterial community structure in the heavy metal contaminated sites along a smelter and a distantly located paddy field to elucidate the factors that are related to the alterations of the bacterial communities under the conditions of heavy metal pollution. Among the study sites, the bacterial communities in the soil did not show any significant differences in their richness and diversity. The soil bacterial communities at the three study sites were distinct from one another at each site, possessing a distinct set of bacterial phylotypes. Among the study sites, significant changes were observed in the abundances of the bacterial phyla and genera. The variations in the bacterial community structure were mostly related to the general soil properties at the phylum level, while at the finer taxonomic levels, the concentrations of arsenic (As) and lead (Pb) were the significant factors, affecting the community structure. The relative abundances of the genera Desulfatibacillum and Desulfovirga were negatively correlated to the concentrations of As, Pb, and cadmium (Cd) in the soil, while the genus Bacillus was positively correlated to the concentrations of As and Cd. According to the results of the prediction of bacterial community functions, the soil bacterial communities of the heavy metal polluted sites were characterized by the more abundant enzymes involved in DNA replication and repair, translation, transcription, and the nucleotide metabolism pathways, while the amino acid and lipid metabolism, as well as the biodegradation potential of xenobiotics, were reduced. Our results showed that the adaptation of the bacterial communities to the heavy metal contamination was predominantly attributed to the replacement process, while the changes in community richness were linked to the variations in the soil pH values.

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Characterisation of hyper tolerant Bacillus firmus L-148 for arsenic oxidation

Bagade

Nandre

Paul

et al. 2020

Environmental Pollution

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As(V)-reduction to As(III) by arsenic-resistantBacillusspp. bacterial strains isolated from low-contaminated sediments of the Oliveri-Tindari Lagoon, Italy

Cited by 11 publications

References 30 publications

Bacillussp. SXB andPantoeasp. IMH, aerobic As(V)-reducing bacteria isolated from arsenic-contaminated soil

Bacillussp. SXB andPantoeasp. IMH, aerobic As(V)-reducing bacteria isolated from arsenic-contaminated soil

The bacterial community structure and functional profile in the heavy metal contaminated paddy soils, surrounding a nonferrous smelter in South Korea

Characterisation of hyper tolerant Bacillus firmus L-148 for arsenic oxidation

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