Microbial Responses to Environmentally Toxic Cadmium
We analyzed the soil microbial communities from one uncontaminated and two metal-impacted soils and found that while cadmium adversely affected the numbers of culturable bacteria in all soils, cadmium-resistant isolates were found from each of the soils. With exposure to 24 and 48 μg ml-1soluble cad...
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Veröffentlicht in: | Microbial ecology 1999-11, Vol.38 (4), p.358-364 |
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description | We analyzed the soil microbial communities from one uncontaminated and two metal-impacted soils and found that while cadmium adversely affected the numbers of culturable bacteria in all soils, cadmium-resistant isolates were found from each of the soils. With exposure to 24 and 48 μg ml-1soluble cadmium, the metal-contaminated soil communities were more resistant than the uncontaminated soil community. In addition, in one metal-stressed soil, the resistant population became more resistant with increased cadmium levels. Ribosomal 16S DNA sequencing identified the isolates as Arthrobacter, Bacillus, or Pseudomonas spp. Further characterization demonstrated that two of the isolates were highly resistant to soluble cadmium with maximum resistance at 275 μg ml-1cadmium. These isolates were also resistant to a variety of antibiotics, namely ampicillin, gentamicin, penicillin, and streptomycin, but no overall correlation was found between enhanced antibiotic resistance and cadmium resistance. One Pseudomonas isolate H1 did become more resistant with increasing cadmium levels, suggesting a different resistance mechanism at high cadmium concentrations. |
doi_str_mv | 10.1007/s002489901001 |
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With exposure to 24 and 48 μg ml-1soluble cadmium, the metal-contaminated soil communities were more resistant than the uncontaminated soil community. In addition, in one metal-stressed soil, the resistant population became more resistant with increased cadmium levels. Ribosomal 16S DNA sequencing identified the isolates as Arthrobacter, Bacillus, or Pseudomonas spp. Further characterization demonstrated that two of the isolates were highly resistant to soluble cadmium with maximum resistance at 275 μg ml-1cadmium. These isolates were also resistant to a variety of antibiotics, namely ampicillin, gentamicin, penicillin, and streptomycin, but no overall correlation was found between enhanced antibiotic resistance and cadmium resistance. One Pseudomonas isolate H1 did become more resistant with increasing cadmium levels, suggesting a different resistance mechanism at high cadmium concentrations.</description><identifier>ISSN: 0095-3628</identifier><identifier>EISSN: 1432-184X</identifier><identifier>DOI: 10.1007/s002489901001</identifier><identifier>PMID: 10758182</identifier><language>eng</language><publisher>United States: Springer-Verlag New York Inc</publisher><subject>Cadmium ; Orchard soils ; Sandy loam soils ; Sedimentary soils ; Soil bacteria ; Soil microorganisms ; Soil pollution ; Soil science ; Soil toxicity ; Soil water</subject><ispartof>Microbial ecology, 1999-11, Vol.38 (4), p.358-364</ispartof><rights>Copyright 2000 Springer-Verlag New York Inc.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/4251693$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/4251693$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>315,781,785,804,27929,27930,58022,58255</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/10758182$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Roane, TM</creatorcontrib><creatorcontrib>Pepper, IL</creatorcontrib><title>Microbial Responses to Environmentally Toxic Cadmium</title><title>Microbial ecology</title><addtitle>Microb Ecol</addtitle><description>We analyzed the soil microbial communities from one uncontaminated and two metal-impacted soils and found that while cadmium adversely affected the numbers of culturable bacteria in all soils, cadmium-resistant isolates were found from each of the soils. With exposure to 24 and 48 μg ml-1soluble cadmium, the metal-contaminated soil communities were more resistant than the uncontaminated soil community. In addition, in one metal-stressed soil, the resistant population became more resistant with increased cadmium levels. Ribosomal 16S DNA sequencing identified the isolates as Arthrobacter, Bacillus, or Pseudomonas spp. Further characterization demonstrated that two of the isolates were highly resistant to soluble cadmium with maximum resistance at 275 μg ml-1cadmium. These isolates were also resistant to a variety of antibiotics, namely ampicillin, gentamicin, penicillin, and streptomycin, but no overall correlation was found between enhanced antibiotic resistance and cadmium resistance. One Pseudomonas isolate H1 did become more resistant with increasing cadmium levels, suggesting a different resistance mechanism at high cadmium concentrations.</description><subject>Cadmium</subject><subject>Orchard soils</subject><subject>Sandy loam soils</subject><subject>Sedimentary soils</subject><subject>Soil bacteria</subject><subject>Soil microorganisms</subject><subject>Soil pollution</subject><subject>Soil science</subject><subject>Soil toxicity</subject><subject>Soil water</subject><issn>0095-3628</issn><issn>1432-184X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1999</creationdate><recordtype>article</recordtype><recordid>eNo9jk1LxDAURYMoTh1duhPpH6jm5aN5WUqZUWFEkC7cDWmaQkrblKYjzr-3MOrqcriHyyXkFugDUKoeI6VMoNZ0ITgjCQjOMkDxeU4SSrXMeM5wRa5ibBdB5YxfkhVQJRGQJUS8eTuFypsu_XBxDEN0MZ1Duhm-_BSG3g2z6bpjWoZvb9PC1L0_9NfkojFddDe_uSbldlMWL9nu_fm1eNplLTA9Z0ZZwatKSW2lw9rmqGsHikLTNMogtw0CCEY1Iq-ZrSgKRAUOuDSIgq_J_Wl2PFS9q_fj5HszHfd_7xfh7iS0cQ7Tfy-YhFxz_gO5j08L</recordid><startdate>19991101</startdate><enddate>19991101</enddate><creator>Roane, TM</creator><creator>Pepper, IL</creator><general>Springer-Verlag New York Inc</general><scope>NPM</scope></search><sort><creationdate>19991101</creationdate><title>Microbial Responses to Environmentally Toxic Cadmium</title><author>Roane, TM ; Pepper, IL</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-j129t-a7c43bb759c5e8dc689de1701fff7a83cf8114209883d2cb0848871e135a8843</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1999</creationdate><topic>Cadmium</topic><topic>Orchard soils</topic><topic>Sandy loam soils</topic><topic>Sedimentary soils</topic><topic>Soil bacteria</topic><topic>Soil microorganisms</topic><topic>Soil pollution</topic><topic>Soil science</topic><topic>Soil toxicity</topic><topic>Soil water</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Roane, TM</creatorcontrib><creatorcontrib>Pepper, IL</creatorcontrib><collection>PubMed</collection><jtitle>Microbial ecology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Roane, TM</au><au>Pepper, IL</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Microbial Responses to Environmentally Toxic Cadmium</atitle><jtitle>Microbial ecology</jtitle><addtitle>Microb Ecol</addtitle><date>1999-11-01</date><risdate>1999</risdate><volume>38</volume><issue>4</issue><spage>358</spage><epage>364</epage><pages>358-364</pages><issn>0095-3628</issn><eissn>1432-184X</eissn><abstract>We analyzed the soil microbial communities from one uncontaminated and two metal-impacted soils and found that while cadmium adversely affected the numbers of culturable bacteria in all soils, cadmium-resistant isolates were found from each of the soils. With exposure to 24 and 48 μg ml-1soluble cadmium, the metal-contaminated soil communities were more resistant than the uncontaminated soil community. In addition, in one metal-stressed soil, the resistant population became more resistant with increased cadmium levels. Ribosomal 16S DNA sequencing identified the isolates as Arthrobacter, Bacillus, or Pseudomonas spp. Further characterization demonstrated that two of the isolates were highly resistant to soluble cadmium with maximum resistance at 275 μg ml-1cadmium. These isolates were also resistant to a variety of antibiotics, namely ampicillin, gentamicin, penicillin, and streptomycin, but no overall correlation was found between enhanced antibiotic resistance and cadmium resistance. One Pseudomonas isolate H1 did become more resistant with increasing cadmium levels, suggesting a different resistance mechanism at high cadmium concentrations.</abstract><cop>United States</cop><pub>Springer-Verlag New York Inc</pub><pmid>10758182</pmid><doi>10.1007/s002489901001</doi><tpages>7</tpages></addata></record> |
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subjects | Cadmium Orchard soils Sandy loam soils Sedimentary soils Soil bacteria Soil microorganisms Soil pollution Soil science Soil toxicity Soil water |
title | Microbial Responses to Environmentally Toxic Cadmium |
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