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dc.contributor.authorSivakumar, Krishnakumar
dc.contributor.authorScarascia, Giantommaso
dc.contributor.authorZaouri, Noor A.
dc.contributor.authorWang, Tiannyu
dc.contributor.authorKaksonen, Anna H.
dc.contributor.authorHong, Pei-Ying
dc.date.accessioned2019-02-10T08:14:58Z
dc.date.available2019-02-10T08:14:58Z
dc.date.issued2019-02-06
dc.identifier.citationSivakumar K, Scarascia G, Zaouri N, Wang T, Kaksonen AH, et al. (2019) Salinity-Mediated Increment in Sulfate Reduction, Biofilm Formation, and Quorum Sensing: A Potential Connection Between Quorum Sensing and Sulfate Reduction? Frontiers in Microbiology 10. Available: http://dx.doi.org/10.3389/fmicb.2019.00188.
dc.identifier.issn1664-302X
dc.identifier.doi10.3389/fmicb.2019.00188
dc.identifier.urihttp://hdl.handle.net/10754/631014
dc.description.abstractBiocorrosion in marine environment is often associated with biofilms of sulfate reducing bacteria (SRB). However, not much information is available on the mechanism underlying exacerbated rates of SRB-mediated biocorrosion under saline conditions. Using Desulfovibrio (D.) vulgaris and Desulfobacterium (Db.) corrodens as model SRBs, the enhancement effects of salinity on sulfate reduction, N-acyl homoserine lactone (AHL) production and biofilm formation by SRBs were demonstrated. Under saline conditions, D. vulgaris and Db. corrodens exhibited significantly higher specific sulfate reduction and specific AHL production rates as well as elevated rates of biofilm formation compared to freshwater medium. Salinity-induced enhancement traits were also confirmed at transcript level through reverse transcription quantitative polymerase chain reaction (RT-qPCR) approach, which showed salinity-influenced increase in the expression of genes associated with carbon metabolism, sulfate reduction, biofilm formation and histidine kinase signal transduction. In addition, by deploying quorum sensing (QS) inhibitors, a potential connection between sulfate reduction and AHL production under saline conditions was demonstrated, which is most significant during early stages of sulfate metabolism. The findings collectively revealed the interconnection between QS, sulfate reduction and biofilm formation among SRBs, and implied the potential of deploying quorum quenching approaches to control SRB-based biocorrosion in saline conditions.
dc.description.sponsorshipAcknowledgments: AK thanks KAUST and CSIRO Land and Water for financial support. We would also like to thank Xiang Zhao in Bioscience Core Lab, King Abdullah University of Science and Technology for technical assistance in conducting RT-qPCR. Funding: The research reported in this publication was supported by CRG funding URF/1/2982-01-01 from King Abdullah University of Science and Technology (KAUST) awarded to P-YH.
dc.publisherFrontiers Media SA
dc.relation.urlhttps://www.frontiersin.org/articles/10.3389/fmicb.2019.00188/full
dc.rightsThis 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) and the copyright owner(s) 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.
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleSalinity-Mediated Increment in Sulfate Reduction, Biofilm Formation, and Quorum Sensing: A Potential Connection Between Quorum Sensing and Sulfate Reduction?
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalFrontiers in Microbiology
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionLand and Water, Commonwealth Scientific and Industrial Research Organization, Floreat, WA, Australia.
kaust.authorSivakumar, Krishnakumar
kaust.authorScarascia, Giantommaso
kaust.authorZaouri, Noor A.
kaust.authorWang, Tiannyu
kaust.authorHong, Pei-Ying
kaust.grant.numberURF/1/2982-01-01
refterms.dateFOA2019-02-11T10:43:33Z


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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) and the copyright owner(s) 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.
Except where otherwise noted, this item's license is described as 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) and the copyright owner(s) 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.