Bacterial community tolerance to Cu in soils with geochemical baseline concentrations (GBCs) of heavy metals: Importance for pollution induced community tolerance (PICT) determinations using the leucine incorporation method

Campillo-Cora, Claudia; Gómez, Diego Soto; Arias‐Estévez, Manuel; Bååth, Erland; Fernández‐Calviño, David

doi:10.1016/j.soilbio.2021.108157

Cited by 10 publications

(5 citation statements)

References 62 publications

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“…A summary of the characteristics obtained for each soil sample is shown in Tables 1 and 2. For more information about the soil characterization methodology, see Campillo-Cora et al [16,17] or the Supplementary Materials. Table 1.…”

Section: Soil Sampling and Analysesmentioning

confidence: 99%

Influence of Soil Properties and Initial Concentration on the Fractionation of Nickel, Zinc, Copper and Lead in Soils Derived from Different Parent Materials

et al. 2021

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Different fractions of Ni, Zn, Cu and Pb were determined in metal-spiked forest soils derived from four parent materials using three extractants (H2O, CaCl2 and diethylenetriaminepentaacetic acid (DTPA)). It is important to determine how parent materials and soil properties affect the retention of these metals in order to predict their behavior and act accordingly in the event of accidental spillage, for example. The extraction of fractions was not sequential (before carrying out the extractions, the soil samples were divided into three parts), so the CaCl2 fraction also included the H2O one, and the DTPA fraction contained the other two. With the results, we developed models to predict the extraction of each fraction employing the physicochemical characteristics of the soil (e.g., pH, organic matter content and texture values) and the amount of metal added. The objective of this work was to determine how the properties of the soil would influence the fractioning of the metals considered, and through these characteristics create models to predict the behavior of each metal fraction. We found correlations between the different fractions of Ni and Zn, suggesting that there are soil properties that condition the retention of both metals. Pb and Cu showed different behavior than Zn or Ni, since the proportions extracted by H2O and CaCl2 were much lower. Regarding the DTPA fraction, unlike the case of Ni or Zn, the extraction of Cu and Pb was more homogeneous; they did not show great variation in different soils, even when considering the results of extraction in limestone soils. This may be due to the fact that the soil properties do not exert an important effect on their availability, or these two metals are considerably sensitive to the effect of pH, and no differences were observed because the extraction of the DTPA fraction was conducted with a buffered solution. For each fraction of metal used, we obtained a model with R2 always greater than 0.65. Considering these results, we can conclude that it is possible to predict Zn, Ni, Cu and Pb availability in soils developed on different parent materials. This can be achieved by identifying some basic soil characteristics and applying the developed equations.

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Section: Soil Sampling and Analysesmentioning

confidence: 99%

Influence of Soil Properties and Initial Concentration on the Fractionation of Nickel, Zinc, Copper and Lead in Soils Derived from Different Parent Materials

et al. 2021

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“…The variation in bacterial community tolerance to Cr in the reference soils may be an indicator that the development of PICT is dependent on soil type. In addition, this bacterial community tolerance to Cr fluctuation in reference soils, together with the natural Cr content in soils (7-394 mg kg −1 , Table S2), highlights the importance of selecting reference soils for PICT studies (Campillo-Cora et al, 2022a, 2021b. Likewise, when Cr was added to soils, bacterial community tolerance to Cr varied greatly between soils with the same Cr level.…”

Section: Resultsmentioning

confidence: 86%

“…when DOC increases, the bacterial community tolerance to Cr also increases. This DOC effect might be a confounding factor in the detection phase of PICT, as was previously reported for Cu (Campillo-Cora et al, 2021b;Lekfeldt et al, 2014). When bacterial communities are extracted from soil, DOC is extracted too.…”

Section: Estimation Of the Increase In Bacterial Community Tolerance ...mentioning

confidence: 82%

“…A multiple regression analysis, using the backward elimination method, was performed to obtain an equation that allows estimating the increase in bacterial community tolerance to Cr ( log IC 50 ) from soil properties (Campillo-Cora et al, 2021b, 2022a. As the inhibition curves for some soils did not fit the logistic model (Eq.…”

Section: Estimation Of Bacterial Community Tolerance Increase To Cr (...mentioning

confidence: 99%

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Increase in bacterial community induced tolerance to Cr in response to soil properties and Cr level in the soil

Campillo-Cora,

Arenas-Lago,

Arias-Estévez

et al. 2023

SOIL

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Abstract. Chromium (Cr) soil pollution is a pressing global concern that demands thorough assessment. The pollution-induced community tolerance (PICT) methodology serves as a highly sensitive tool capable of directly assessing metal toxicity within microbial communities. In this study, 10 soils exhibiting a wide range of properties were subjected to Cr contamination, with concentrations ranging from 31.25 to 2000 mg Cr kg−1, in addition to the control. Bacterial growth, assessed using the [3H]-leucine incorporation technique, was used to determine whether bacterial communities developed tolerance to Cr, i.e. PICT to Cr in response to Cr additions to different soil types. The obtained results revealed that at concentrations of 1000 or 2000 mg Cr kg−1, certain bacterial communities showed inhibited growth, likely attributable to elevated Cr toxicity, while others continued to thrive. Interestingly, with Cr concentrations below 500 mg Cr kg−1, bacterial communities demonstrated two distinct responses depending on soil type: 7 of the 10 studied soils exhibited an increased bacterial community tolerance to Cr, while the remaining 3 soils did not develop such tolerance. Furthermore, the Cr level at which bacterial communities developed tolerance to Cr varies among soils, indicating varying levels of Cr toxicity between studied soils. The dissolved organic carbon (DOC) and the fraction of Cr extracted with distilled water (H2O-Cr) played an essential role in shaping the impact of Cr on microbial communities (R2=95.6 %). These factors (DOC and H2O-Cr) contribute to increased Cr toxicity in soil, i.e. during the selection phase of the PICT methodology.

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“…(Fe, Al) compounds in the 10 studied soils and heavy metal content (adapted fromCampillo-Cora et al (2021b) …”

mentioning

confidence: 99%

Supplementary material to "Increase of bacterial community induced-tolerance to Cr in response to soil properties and Cr level in soil"

Campillo-Cora¹,

Arenas-Lago²,

Arias‐Estévez³

et al. 2023

Preprint

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Bacterial community tolerance to Cu in soils with geochemical baseline concentrations (GBCs) of heavy metals: Importance for pollution induced community tolerance (PICT) determinations using the leucine incorporation method

Cited by 10 publications

References 62 publications

Influence of Soil Properties and Initial Concentration on the Fractionation of Nickel, Zinc, Copper and Lead in Soils Derived from Different Parent Materials

Influence of Soil Properties and Initial Concentration on the Fractionation of Nickel, Zinc, Copper and Lead in Soils Derived from Different Parent Materials

Increase in bacterial community induced tolerance to Cr in response to soil properties and Cr level in the soil

Supplementary material to "Increase of bacterial community induced-tolerance to Cr in response to soil properties and Cr level in soil"

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