Identification of Electrode Respiring, Hydrocarbonoclastic Bacterial Strain Stenotrophomonas maltophilia MK2 Highlights the Untapped Potential for Environmental Bioremediation
Identifieur interne : 000B41 ( Pmc/Checkpoint ); précédent : 000B40; suivant : 000B42Identification of Electrode Respiring, Hydrocarbonoclastic Bacterial Strain Stenotrophomonas maltophilia MK2 Highlights the Untapped Potential for Environmental Bioremediation
Auteurs : Krishnaveni Venkidusamy [Australie] ; Mallavarapu Megharaj [Australie]Source :
- Frontiers in Microbiology [ 1664-302X ] ; 2016.
Abstract
Electrode respiring bacteria (ERB) possess a great potential for many biotechnological applications such as microbial electrochemical remediation systems (MERS) because of their exoelectrogenic capabilities to degrade xenobiotic pollutants. Very few ERB have been isolated from MERS, those exhibited a bioremediation potential toward organic contaminants. Here we report once such bacterial strain,
Url:
DOI: 10.3389/fmicb.2016.01965
PubMed: 28018304
PubMed Central: 5145854
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Identification of Electrode Respiring, Hydrocarbonoclastic Bacterial Strain <italic>Stenotrophomonas maltophilia</italic> MK2 Highlights the Untapped Potential for Environmental Bioremediation</title><author><name sortKey="Venkidusamy, Krishnaveni" sort="Venkidusamy, Krishnaveni" uniqKey="Venkidusamy K" first="Krishnaveni" last="Venkidusamy">Krishnaveni Venkidusamy</name><affiliation wicri:level="1"><nlm:aff id="aff1"><institution>Centre for Environmental Risk Assessment and Remediation, University of South Australia</institution><country>Mawson Lakes, SA, Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea></wicri:regionArea></affiliation><affiliation wicri:level="1"><nlm:aff id="aff2"><institution>Cooperative Research Centre for Contamination Assessment and Remediation of the Environment</institution><country>Mawson Lakes, SA, Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea></wicri:regionArea></affiliation></author><author><name sortKey="Megharaj, Mallavarapu" sort="Megharaj, Mallavarapu" uniqKey="Megharaj M" first="Mallavarapu" last="Megharaj">Mallavarapu Megharaj</name><affiliation wicri:level="1"><nlm:aff id="aff1"><institution>Centre for Environmental Risk Assessment and Remediation, University of South Australia</institution><country>Mawson Lakes, SA, Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea></wicri:regionArea></affiliation><affiliation wicri:level="1"><nlm:aff id="aff2"><institution>Cooperative Research Centre for Contamination Assessment and Remediation of the Environment</institution><country>Mawson Lakes, SA, Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea></wicri:regionArea></affiliation><affiliation wicri:level="1"><nlm:aff id="aff3"><institution>Global Centre for Environmental Remediation, The University of Newcastle</institution><country>Callaghan, NSW, Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea></wicri:regionArea></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">28018304</idno><idno type="pmc">5145854</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5145854</idno><idno type="RBID">PMC:5145854</idno><idno type="doi">10.3389/fmicb.2016.01965</idno><date when="2016">2016</date><idno type="wicri:Area/Pmc/Corpus">000C77</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000C77</idno><idno type="wicri:Area/Pmc/Curation">000C77</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Curation">000C77</idno><idno type="wicri:Area/Pmc/Checkpoint">000B41</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Checkpoint">000B41</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Identification of Electrode Respiring, Hydrocarbonoclastic Bacterial Strain <italic>Stenotrophomonas maltophilia</italic> MK2 Highlights the Untapped Potential for Environmental Bioremediation</title><author><name sortKey="Venkidusamy, Krishnaveni" sort="Venkidusamy, Krishnaveni" uniqKey="Venkidusamy K" first="Krishnaveni" last="Venkidusamy">Krishnaveni Venkidusamy</name><affiliation wicri:level="1"><nlm:aff id="aff1"><institution>Centre for Environmental Risk Assessment and Remediation, University of South Australia</institution><country>Mawson Lakes, SA, Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea></wicri:regionArea></affiliation><affiliation wicri:level="1"><nlm:aff id="aff2"><institution>Cooperative Research Centre for Contamination Assessment and Remediation of the Environment</institution><country>Mawson Lakes, SA, Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea></wicri:regionArea></affiliation></author><author><name sortKey="Megharaj, Mallavarapu" sort="Megharaj, Mallavarapu" uniqKey="Megharaj M" first="Mallavarapu" last="Megharaj">Mallavarapu Megharaj</name><affiliation wicri:level="1"><nlm:aff id="aff1"><institution>Centre for Environmental Risk Assessment and Remediation, University of South Australia</institution><country>Mawson Lakes, SA, Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea></wicri:regionArea></affiliation><affiliation wicri:level="1"><nlm:aff id="aff2"><institution>Cooperative Research Centre for Contamination Assessment and Remediation of the Environment</institution><country>Mawson Lakes, SA, Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea></wicri:regionArea></affiliation><affiliation wicri:level="1"><nlm:aff id="aff3"><institution>Global Centre for Environmental Remediation, The University of Newcastle</institution><country>Callaghan, NSW, Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea></wicri:regionArea></affiliation></author></analytic><series><title level="j">Frontiers in Microbiology</title><idno type="eISSN">1664-302X</idno><imprint><date when="2016">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>Electrode respiring bacteria (ERB) possess a great potential for many biotechnological applications such as microbial electrochemical remediation systems (MERS) because of their exoelectrogenic capabilities to degrade xenobiotic pollutants. Very few ERB have been isolated from MERS, those exhibited a bioremediation potential toward organic contaminants. Here we report once such bacterial strain, <italic>Stenotrophomonas maltophilia</italic> MK2, a facultative anaerobic bacterium isolated from a hydrocarbon fed MERS, showed a potent hydrocarbonoclastic behavior under aerobic and anaerobic environments. Distinct properties of the strain MK2 were anaerobic fermentation of the amino acids, electrode respiration, anaerobic nitrate reduction and the ability to metabolize n-alkane components (C8–C36) of petroleum hydrocarbons (PH) including the biomarkers, pristine and phytane. The characteristic of diazoic dye decolorization was used as a criterion for pre-screening the possible electrochemically active microbial candidates. Bioelectricity generation with concomitant dye decolorization in MERS showed that the strain is electrochemically active. In acetate fed microbial fuel cells (MFCs), maximum current density of 273 ± 8 mA/m<sup>2</sup> (1000 Ω) was produced (power density 113 ± 7 mW/m<sup>2</sup>) by strain MK2 with a coulombic efficiency of 34.8%. Further, the presence of possible alkane hydroxylase genes (<italic>alk</italic>B and <italic>rub</italic>A) in the strain MK2 indicated that the genes involved in hydrocarbon degradation are of diverse origin. Such observations demonstrated the potential of facultative hydrocarbon degradation in contaminated environments. Identification of such a novel petrochemical hydrocarbon degrading ERB is likely to offer a new route to the sustainable bioremedial process of source zone contamination with simultaneous energy generation through MERS.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct></biblStruct><biblStruct><analytic><author><name sortKey="Assih, E A" uniqKey="Assih E">E. A. 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<front><journal-meta><journal-id journal-id-type="nlm-ta">Front Microbiol</journal-id><journal-id journal-id-type="iso-abbrev">Front Microbiol</journal-id><journal-id journal-id-type="publisher-id">Front. Microbiol.</journal-id><journal-title-group><journal-title>Frontiers in Microbiology</journal-title></journal-title-group><issn pub-type="epub">1664-302X</issn><publisher><publisher-name>Frontiers Media S.A.</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">28018304</article-id><article-id pub-id-type="pmc">5145854</article-id><article-id pub-id-type="doi">10.3389/fmicb.2016.01965</article-id><article-categories><subj-group subj-group-type="heading"><subject>Microbiology</subject><subj-group><subject>Original Research</subject></subj-group></subj-group></article-categories><title-group><article-title>Identification of Electrode Respiring, Hydrocarbonoclastic Bacterial Strain <italic>Stenotrophomonas maltophilia</italic> MK2 Highlights the Untapped Potential for Environmental Bioremediation</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Venkidusamy</surname><given-names>Krishnaveni</given-names></name><xref ref-type="aff" rid="aff1"><sup>1</sup></xref><xref ref-type="aff" rid="aff2"><sup>2</sup></xref><xref ref-type="author-notes" rid="fn001"><sup>*</sup></xref><uri xlink:type="simple" xlink:href="http://loop.frontiersin.org/people/343127/overview"></uri></contrib><contrib contrib-type="author"><name><surname>Megharaj</surname><given-names>Mallavarapu</given-names></name><xref ref-type="aff" rid="aff1"><sup>1</sup></xref><xref ref-type="aff" rid="aff2"><sup>2</sup></xref><xref ref-type="aff" rid="aff3"><sup>3</sup></xref><uri xlink:type="simple" xlink:href="http://loop.frontiersin.org/people/36475/overview"></uri></contrib></contrib-group><aff id="aff1"><sup>1</sup><institution>Centre for Environmental Risk Assessment and Remediation, University of South Australia</institution><country>Mawson Lakes, SA, Australia</country></aff><aff id="aff2"><sup>2</sup><institution>Cooperative Research Centre for Contamination Assessment and Remediation of the Environment</institution><country>Mawson Lakes, SA, Australia</country></aff><aff id="aff3"><sup>3</sup><institution>Global Centre for Environmental Remediation, The University of Newcastle</institution><country>Callaghan, NSW, Australia</country></aff><author-notes><fn fn-type="edited-by"><p>Edited by: Yong Xiao, Institute of Urban Environment (Chinese Academy of Sciences), China</p></fn><fn fn-type="edited-by"><p>Reviewed by: Yingying Wang, Nankai University, China; Shaohua Chen, Agency for Science, Technology and Research, Singapore</p></fn><corresp id="fn001">*Correspondence: Krishnaveni Venkidusamy <email xlink:type="simple">krishnaveni.venkidusamy@mymail.unisa.edu.au</email></corresp><fn fn-type="other" id="fn002"><p>This article was submitted to Microbiotechnology, Ecotoxicology and Bioremediation, a section of the journal Frontiers in Microbiology</p></fn></author-notes><pub-date pub-type="epub"><day>09</day><month>12</month><year>2016</year></pub-date><pub-date pub-type="collection"><year>2016</year></pub-date><volume>7</volume><elocation-id>1965</elocation-id><history><date date-type="received"><day>09</day><month>9</month><year>2016</year></date><date date-type="accepted"><day>24</day><month>11</month><year>2016</year></date></history><permissions><copyright-statement>Copyright © 2016 Venkidusamy and Megharaj.</copyright-statement><copyright-year>2016</copyright-year><copyright-holder>Venkidusamy and Megharaj</copyright-holder><license xlink:href="http://creativecommons.org/licenses/by/4.0/"><license-p>This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.</license-p></license></permissions><abstract><p>Electrode respiring bacteria (ERB) possess a great potential for many biotechnological applications such as microbial electrochemical remediation systems (MERS) because of their exoelectrogenic capabilities to degrade xenobiotic pollutants. Very few ERB have been isolated from MERS, those exhibited a bioremediation potential toward organic contaminants. Here we report once such bacterial strain, <italic>Stenotrophomonas maltophilia</italic> MK2, a facultative anaerobic bacterium isolated from a hydrocarbon fed MERS, showed a potent hydrocarbonoclastic behavior under aerobic and anaerobic environments. Distinct properties of the strain MK2 were anaerobic fermentation of the amino acids, electrode respiration, anaerobic nitrate reduction and the ability to metabolize n-alkane components (C8–C36) of petroleum hydrocarbons (PH) including the biomarkers, pristine and phytane. The characteristic of diazoic dye decolorization was used as a criterion for pre-screening the possible electrochemically active microbial candidates. Bioelectricity generation with concomitant dye decolorization in MERS showed that the strain is electrochemically active. In acetate fed microbial fuel cells (MFCs), maximum current density of 273 ± 8 mA/m<sup>2</sup> (1000 Ω) was produced (power density 113 ± 7 mW/m<sup>2</sup>) by strain MK2 with a coulombic efficiency of 34.8%. Further, the presence of possible alkane hydroxylase genes (<italic>alk</italic>B and <italic>rub</italic>A) in the strain MK2 indicated that the genes involved in hydrocarbon degradation are of diverse origin. Such observations demonstrated the potential of facultative hydrocarbon degradation in contaminated environments. Identification of such a novel petrochemical hydrocarbon degrading ERB is likely to offer a new route to the sustainable bioremedial process of source zone contamination with simultaneous energy generation through MERS.</p></abstract><kwd-group><kwd>electrode respiring bacteria</kwd><kwd>microbial electrochemical remediation systems</kwd><kwd><italic>Stenotrophomonas maltophilia</italic> MK2</kwd><kwd>facultative hydrocarbon degradation</kwd><kwd>dye decolorization</kwd><kwd>catabolic genes (<italic>alk</italic>B, <italic>rub</italic>A)</kwd></kwd-group><counts><fig-count count="7"></fig-count><table-count count="0"></table-count><equation-count count="3"></equation-count><ref-count count="67"></ref-count><page-count count="12"></page-count><word-count count="8445"></word-count></counts></article-meta></front></pmc><affiliations><list><country><li>Australie</li></country></list><tree><country name="Australie"><noRegion><name sortKey="Venkidusamy, Krishnaveni" sort="Venkidusamy, Krishnaveni" uniqKey="Venkidusamy K" first="Krishnaveni" last="Venkidusamy">Krishnaveni Venkidusamy</name></noRegion><name sortKey="Megharaj, Mallavarapu" sort="Megharaj, Mallavarapu" uniqKey="Megharaj M" first="Mallavarapu" last="Megharaj">Mallavarapu Megharaj</name><name sortKey="Megharaj, Mallavarapu" sort="Megharaj, Mallavarapu" uniqKey="Megharaj M" first="Mallavarapu" last="Megharaj">Mallavarapu Megharaj</name><name sortKey="Megharaj, Mallavarapu" sort="Megharaj, Mallavarapu" uniqKey="Megharaj M" first="Mallavarapu" last="Megharaj">Mallavarapu Megharaj</name><name sortKey="Venkidusamy, Krishnaveni" sort="Venkidusamy, Krishnaveni" uniqKey="Venkidusamy K" first="Krishnaveni" last="Venkidusamy">Krishnaveni Venkidusamy</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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