Arsenic-resistant bacteria associated with roots of the wild Cirsium arvense (L.) plant from an arsenic polluted soil, and screening of potential plant growth-promoting characteristics

Cavalca, L.; Zanchi, R.; Corsini, A.; Colombo, Monica; Romagnoli, Cristina; Canzi, Elena; Andreoni, V.

doi:10.1016/j.syapm.2010.02.004

Cited by 124 publications

(60 citation statements)

References 69 publications

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“…Phylogeny of aioA deduced aminoacid sequence was inconsistent with the 16S rRNA phylogeny of the strain (see supporting material), in accordance with recent reports [13,22] that support lateral gene transfer As(III) oxidase among bacterial populations. In addition to aioA, strain As3-1b harbored arsC and arsB genes [6], evidencing that in the strain multiple mechanisms were present to stand As toxicity either through As(V) reduction via ArsC and As(III) extrusion ArsB or through As(III) oxidation via AioA for gaining energy, as also described for Herminiimonas arsenicoxydans [19].…”

Section: Discussionsupporting

confidence: 58%

“…The strain oxidizes As(III) in batch cultures under heterotrophic conditions [6]. In this study, we evidenced the facultative chemolithotrophic growth of the strain on As(III).…”

Section: Introductionmentioning

confidence: 52%

“…Before use, the cells were grown to mid-exponential phase in a defined mineral medium containing a vitamin solution (BBM) and supplemented with Na gluconate (0.6 %, w/v) as C source (BBMG) at 28°C [6].…”

Section: Methodsmentioning

confidence: 99%

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Arsenite Oxidation in Ancylobacter dichloromethanicus As3-1b Strain: Detection of Genes Involved in Arsenite Oxidation and CO2 Fixation

et al. 2012

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The aim of this study was to characterize a facultative chemolithotrophic arsenite-oxidizing bacterium by evaluating the growth and the rate of arsenite oxidation and to investigate the genetic determinants for arsenic resistance and CO(2) fixation. The strain under study, Ancylobacter dichloromethanicus As3-1b, in a minimal medium containing 3 mM of arsenite as electron donor and 6 mM of CO(2)-bicarbonate as the C source, has a doubling time (t(d)) of 8.1 h. Growth and arsenite oxidation were significantly enhanced by the presence of 0.01 % yeast extract, decreasing the t(d) to 4.3 h. The strain carried arsenite oxidase (aioA) gene highly similar to those of previously reported arsenite-oxidizing Alpha-proteobacteria. The RuBisCO Type-I (cbbL) gene was amplified and sequenced too, underscoring the ability of As3-1b to carry out autotrophic As(III) oxidation. The results suggest that A. dichloromethanicus As3-1b can be a good candidate for the oxidation of arsenite in polluted waters or groundwaters.

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Section: Discussionsupporting

confidence: 58%

“…The strain oxidizes As(III) in batch cultures under heterotrophic conditions [6]. In this study, we evidenced the facultative chemolithotrophic growth of the strain on As(III).…”

Section: Introductionmentioning

confidence: 52%

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Arsenite Oxidation in Ancylobacter dichloromethanicus As3-1b Strain: Detection of Genes Involved in Arsenite Oxidation and CO2 Fixation

et al. 2012

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“…Total arsenic content of soil was 214 mg kg -1 : 181 mg kg -1 was associated with well crystallised Fe hydroxides, 25 mg kg -1 was specifically sorbed and 0.25 mg kg -1 was present as labile fraction. The count of total heterotrophic bacteria (THB) and ARB present in the soil at the sampling time was 8.07 9 10 6 (±1.26) and 3.37 9 10 6 (±0.46) CFU g -1 soil d.w., respectively (Cavalca et al 2010).…”

Section: Seed Inoculation and Pot Experimentsmentioning

confidence: 99%

Rhizosphere colonization and arsenic translocation in sunflower (Helianthus annuus L.) by arsenate reducing Alcaligenes sp. strain Dhal-L

Cavalca

Corsini

Bachate

et al. 2013

World J Microbiol Biotechnol

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In the present study, six arsenic-resistant strains previously isolated were tested for their plant growth promoting characteristics and heavy metal resistance, in order to choose one model strain as an inoculum for sunflower plants in pot experiments. The aim was to investigate the effect of arsenic-resistant strain on sunflower growth and on arsenic uptake from arsenic contaminated soil. Based on plant growth promoting characteristics and heavy metal resistance, Alcaligenes sp. strain Dhal-L was chosen as an inoculum. Beside the ability to reduce arsenate to arsenite via an Ars operon, the strain exhibited 1-amino-cyclopropane-1-carboxylic acid deaminase activity and it was also able to produce siderophore and indole acetic acid. Pot experiments were conducted with an agricultural soil contaminated with arsenic (214 mg kg -1 ). A real time PCR method was set up based on the quantification of ACR3(2) type of arsenite efflux pump carried by Alcaligenes sp. strain Dhal-L, in order to monitor presence and colonisation of the strain in the bulk and rhizospheric soil. As a result of strain inoculation, arsenic uptake by plants was increased by 53 %, whereas ACR3(2) gene copy number in rhizospheric soil was 100 times higher in inoculated than in control pots, indicating the colonisation of strain. The results indicated that the presence of arsenate reducing strains in the rhizosphere of sunflower influences arsenic mobilization and promotes arsenic uptake by plant.

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“…Different technology have been identified to reduce arsenic concentrations in groundwater [9][10][11][12][13][14][15][16][17][18][19][20][21]. Coagulation with alum can be used to reduce arsenic concentrations to a certain level [22], and adsorption has been found to be effective in removing several metals in groundwater including arsenic while using less chemicals and generating less waste [11,12,15].…”

Section: Introductionmentioning

confidence: 99%

Effect of Water Hardness and pH on Adsorption Kinetic of Arsenate on Iron Oxide

Janjaroen¹,

Dilokdumkeng²,

Jhandrta³

2018

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Abstract. The adsorption of arsenate on iron oxide particles was studied as a function of pH and hardness concentrations. Morphology of the studied iron oxide surface was rough and irregular. The major chemical composition of iron oxide particles was Fe2O3 (96%). The optimal solution pH for adsorption was 8.0. The equilibrium of arsenic concentration was reached after 1 hour of contact time. The adsorption capacity (qe) increased with increasing iron oxide particles. Freundlich isotherm and pseudo-second order reaction were best descriptors of arsenate adsorption behavior. Calcium or magnesium concentrations did not significantly affect the adsorbed concentration of arsenic at equilibrium. However, arsenate adsorption was higher at low pH and decreased significantly with increasing pH.

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Arsenic-resistant bacteria associated with roots of the wild Cirsium arvense (L.) plant from an arsenic polluted soil, and screening of potential plant growth-promoting characteristics

Cited by 124 publications

References 69 publications

Arsenite Oxidation in Ancylobacter dichloromethanicus As3-1b Strain: Detection of Genes Involved in Arsenite Oxidation and CO2 Fixation

Arsenite Oxidation in Ancylobacter dichloromethanicus As3-1b Strain: Detection of Genes Involved in Arsenite Oxidation and CO2 Fixation

Rhizosphere colonization and arsenic translocation in sunflower (Helianthus annuus L.) by arsenate reducing Alcaligenes sp. strain Dhal-L

Effect of Water Hardness and pH on Adsorption Kinetic of Arsenate on Iron Oxide

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