Salinity-Mediated Increment in Sulfate Reduction, Biofilm Formation, and Quorum Sensing: A Potential Connection Between Quorum Sensing and Sulfate Reduction?

Frontiers in Microbiology
Krishnakumar SivakumarPei-Ying Hong

Abstract

Biocorrosion 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 signific...Continue Reading

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Citations

Apr 15, 2020·NPJ Biofilms and Microbiomes·Saikat JanaJinju Chen
Dec 20, 2020·Colloids and Surfaces. B, Biointerfaces·Tahereh Seifi, Ali Reza Kamali
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Nov 16, 2021·Frontiers in Microbiology·Abhilash Kumar TripathiRajesh Kumar Sani

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Methods Mentioned

BETA
Flow cytometry
biosensor
size exclusion chromatography

Software Mentioned

Data Analysis
Chromeleon
ChromCALC uni
Excel

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