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Bacterial community structure and activity in different Cd-treated forest soils

Abstract In this study we compared indicators of Cd bioavailability (water extracts, Lakanen extracts, free ions) and ecotoxicity in forest soils with contrasting physico-chemical characteristics. Soil samples were treated with CdCl2 solutions (0, 0.1, 1, 10 and 100 mM) and incubated for 30 days. Mi... Full description

Journal Title: FEMS microbiology ecology 2006-11-01, Vol.58 (2), p.278-292
Main Author: Lazzaro, Anna
Other Authors: Hartmann, Martin , Blaser, Peter , Widmer, Franco , Schulin, Rainer , Frey, Beat
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: Alma/SFX Local Collection
Publisher: Oxford, UK: Blackwell Publishing Ltd
ID: ISSN: 0168-6496
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recordid: cdi_proquest_miscellaneous_68993357
title: Bacterial community structure and activity in different Cd-treated forest soils
format: Article
creator:
  • Lazzaro, Anna
  • Hartmann, Martin
  • Blaser, Peter
  • Widmer, Franco
  • Schulin, Rainer
  • Frey, Beat
subjects:
  • 16S rRNA gene
  • Acid phosphatase
  • Acid Phosphatase - analysis
  • Aluminum Silicates - analysis
  • Anti-Bacterial Agents - pharmacology
  • b-Glucosidase
  • Bacteria
  • Bacteria - classification
  • Bacteria - drug effects
  • Bacteria - growth & development
  • Bacteria - isolation & purification
  • Bacterial Proteins - analysis
  • Bacteriology
  • basal respiration
  • beta-Glucosidase - analysis
  • Bioavailability
  • Biodiversity
  • Biological activity
  • Biological and medical sciences
  • Cadmium
  • Cadmium chloride
  • Cadmium Chloride - analysis
  • Cadmium Chloride - pharmacology
  • Cellobiase
  • Clay
  • Communities
  • Community structure
  • DNA Fingerprinting
  • DNA, Bacterial - genetics
  • DNA, Bacterial - isolation & purification
  • enzymatic activities
  • Enzymatic activity
  • Fingerprinting
  • Forest soils
  • Forests
  • free ion
  • Fundamental and applied biological sciences. Psychology
  • Glucosidase
  • Hydrogen-Ion Concentration
  • Microbial activity
  • Microbiology
  • Microorganisms
  • Miscellaneous
  • Organic chemistry
  • pH effects
  • Polymerase Chain Reaction
  • Polymorphism
  • Polymorphism, Restriction Fragment Length
  • Respiration
  • Restriction fragment length polymorphism
  • Soil - analysis
  • Soil chemistry
  • Soil Microbiology
  • Soil microorganisms
  • Soil properties
  • Soil solution
  • Soil structure
  • Soil treatment
  • Soils
  • terminal restriction fragment length polymorphism (T‐RFLP)
  • Trees - microbiology
ispartof: FEMS microbiology ecology, 2006-11-01, Vol.58 (2), p.278-292
description: Abstract In this study we compared indicators of Cd bioavailability (water extracts, Lakanen extracts, free ions) and ecotoxicity in forest soils with contrasting physico-chemical characteristics. Soil samples were treated with CdCl2 solutions (0, 0.1, 1, 10 and 100 mM) and incubated for 30 days. Microbial activity indexes (acid phosphatase, β-glucosidase, basal respiration) and changes in bacterial community structure using terminal restriction fragment length polymorphism (T-RFLP) fingerprinting were investigated. The Cd concentrations measured ranged from 1% to 37% of the total additions in water extracts, to higher levels in Lakanen extracts. Effects of Cd were observed at bioavailable concentrations exceeding United Nations/European Economic Commission UN/ECE guidelines for total Cd in the soil solution. Basal respiration was the most affected index, while enzymatic activities showed variable responses to the Cd treatments. We also noticed that soils with pH higher than 6.7 and clay content higher than 50% showed inhibition of basal respiration but no marked shift in bacterial community structure. Soils with lower pH (pH
language: eng
source: Alma/SFX Local Collection
identifier: ISSN: 0168-6496
fulltext: fulltext
issn:
  • 0168-6496
  • 1574-6941
url: Link


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descriptionAbstract In this study we compared indicators of Cd bioavailability (water extracts, Lakanen extracts, free ions) and ecotoxicity in forest soils with contrasting physico-chemical characteristics. Soil samples were treated with CdCl2 solutions (0, 0.1, 1, 10 and 100 mM) and incubated for 30 days. Microbial activity indexes (acid phosphatase, β-glucosidase, basal respiration) and changes in bacterial community structure using terminal restriction fragment length polymorphism (T-RFLP) fingerprinting were investigated. The Cd concentrations measured ranged from 1% to 37% of the total additions in water extracts, to higher levels in Lakanen extracts. Effects of Cd were observed at bioavailable concentrations exceeding United Nations/European Economic Commission UN/ECE guidelines for total Cd in the soil solution. Basal respiration was the most affected index, while enzymatic activities showed variable responses to the Cd treatments. We also noticed that soils with pH higher than 6.7 and clay content higher than 50% showed inhibition of basal respiration but no marked shift in bacterial community structure. Soils with lower pH (pH <5.8) with less clay content (<50%) showed in addition strong changes in the bacterial community structure. Our results provide evidence for the importance of relating the effects of Cd on the soil communities to soil properties and to bioavailability.
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languageeng
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subject16S rRNA gene ; Acid phosphatase ; Acid Phosphatase - analysis ; Aluminum Silicates - analysis ; Anti-Bacterial Agents - pharmacology ; b-Glucosidase ; Bacteria ; Bacteria - classification ; Bacteria - drug effects ; Bacteria - growth & development ; Bacteria - isolation & purification ; Bacterial Proteins - analysis ; Bacteriology ; basal respiration ; beta-Glucosidase - analysis ; Bioavailability ; Biodiversity ; Biological activity ; Biological and medical sciences ; Cadmium ; Cadmium chloride ; Cadmium Chloride - analysis ; Cadmium Chloride - pharmacology ; Cellobiase ; Clay ; Communities ; Community structure ; DNA Fingerprinting ; DNA, Bacterial - genetics ; DNA, Bacterial - isolation & purification ; enzymatic activities ; Enzymatic activity ; Fingerprinting ; Forest soils ; Forests ; free ion ; Fundamental and applied biological sciences. Psychology ; Glucosidase ; Hydrogen-Ion Concentration ; Microbial activity ; Microbiology ; Microorganisms ; Miscellaneous ; Organic chemistry ; pH effects ; Polymerase Chain Reaction ; Polymorphism ; Polymorphism, Restriction Fragment Length ; Respiration ; Restriction fragment length polymorphism ; Soil - analysis ; Soil chemistry ; Soil Microbiology ; Soil microorganisms ; Soil properties ; Soil solution ; Soil structure ; Soil treatment ; Soils ; terminal restriction fragment length polymorphism (T‐RFLP) ; Trees - microbiology
ispartofFEMS microbiology ecology, 2006-11-01, Vol.58 (2), p.278-292
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descriptionAbstract In this study we compared indicators of Cd bioavailability (water extracts, Lakanen extracts, free ions) and ecotoxicity in forest soils with contrasting physico-chemical characteristics. Soil samples were treated with CdCl2 solutions (0, 0.1, 1, 10 and 100 mM) and incubated for 30 days. Microbial activity indexes (acid phosphatase, β-glucosidase, basal respiration) and changes in bacterial community structure using terminal restriction fragment length polymorphism (T-RFLP) fingerprinting were investigated. The Cd concentrations measured ranged from 1% to 37% of the total additions in water extracts, to higher levels in Lakanen extracts. Effects of Cd were observed at bioavailable concentrations exceeding United Nations/European Economic Commission UN/ECE guidelines for total Cd in the soil solution. Basal respiration was the most affected index, while enzymatic activities showed variable responses to the Cd treatments. We also noticed that soils with pH higher than 6.7 and clay content higher than 50% showed inhibition of basal respiration but no marked shift in bacterial community structure. Soils with lower pH (pH <5.8) with less clay content (<50%) showed in addition strong changes in the bacterial community structure. Our results provide evidence for the importance of relating the effects of Cd on the soil communities to soil properties and to bioavailability.
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016S rRNA gene
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6Bacteria
7Bacteria - classification
8Bacteria - drug effects
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10Bacteria - isolation & purification
11Bacterial Proteins - analysis
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13basal respiration
14beta-Glucosidase - analysis
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16Biodiversity
17Biological activity
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19Cadmium
20Cadmium chloride
21Cadmium Chloride - analysis
22Cadmium Chloride - pharmacology
23Cellobiase
24Clay
25Communities
26Community structure
27DNA Fingerprinting
28DNA, Bacterial - genetics
29DNA, Bacterial - isolation & purification
30enzymatic activities
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35free ion
36Fundamental and applied biological sciences. Psychology
37Glucosidase
38Hydrogen-Ion Concentration
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40Microbiology
41Microorganisms
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43Organic chemistry
44pH effects
45Polymerase Chain Reaction
46Polymorphism
47Polymorphism, Restriction Fragment Length
48Respiration
49Restriction fragment length polymorphism
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52Soil Microbiology
53Soil microorganisms
54Soil properties
55Soil solution
56Soil structure
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60Trees - microbiology
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abstractAbstract In this study we compared indicators of Cd bioavailability (water extracts, Lakanen extracts, free ions) and ecotoxicity in forest soils with contrasting physico-chemical characteristics. Soil samples were treated with CdCl2 solutions (0, 0.1, 1, 10 and 100 mM) and incubated for 30 days. Microbial activity indexes (acid phosphatase, β-glucosidase, basal respiration) and changes in bacterial community structure using terminal restriction fragment length polymorphism (T-RFLP) fingerprinting were investigated. The Cd concentrations measured ranged from 1% to 37% of the total additions in water extracts, to higher levels in Lakanen extracts. Effects of Cd were observed at bioavailable concentrations exceeding United Nations/European Economic Commission UN/ECE guidelines for total Cd in the soil solution. Basal respiration was the most affected index, while enzymatic activities showed variable responses to the Cd treatments. We also noticed that soils with pH higher than 6.7 and clay content higher than 50% showed inhibition of basal respiration but no marked shift in bacterial community structure. Soils with lower pH (pH <5.8) with less clay content (<50%) showed in addition strong changes in the bacterial community structure. Our results provide evidence for the importance of relating the effects of Cd on the soil communities to soil properties and to bioavailability.
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