Abstract
Vibrio parahaemolyticus is a moderately halophilic, salt-requiring organism that exhibits optimal growth at approximately 3% salt. Thus, salinity stress is one of the most important stimuli during its lifecycle. The bacterium possesses a strong ability to form biofilms on surfaces, which are thought to be involved in protecting it from adverse environmental conditions. In the present study, salinity-dependent biofilm formation by V. parahaemolyticus was investigated by combining crystal violet staining, colony morphology, intracellular c-di-GMP quantification and quantitative PCR. The results showed that biofilm formation by V. parahaemolyticus was significantly enhanced in low salinity growth conditions and was affected by incubation time. In addition, low salinity reduced intracellular c-di-GMP degradation in V. parahaemolyticus. Transcription of genes encoding ScrABC and ScrG proteins, which are involved in intracellular c-di-GMP metabolism, was inhibited by low salinity growth conditions. Thus, reduced intracellular c-di-GMP degradation in V. parahaemolyticus in low salinity growth conditions may be mediated by repression of scrG and scrABC transcription. Taken together, these results demonstrated for the first time that salinity regulates biofilm formation and c-di-GMP production in V. parahaemolyticus.
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All data generated or analyzed during this study are included in the manuscript. Further inquiries may be directed to the corresponding authors.
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We thank International Science Editing (http://www.internationalscienceediting.com) for editing this manuscript
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This study was supported by grants from the National Natural Science Foundation of China (Grant No. 82072239) and the Fundamental Research Funds for the Central Universities (JUSRP121061).
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YZ, DZ and RL designed, organized and supervised the experiments, interpreted the results and edited the manuscript. XL, JF, MZ, XX and QW performed the laboratory experiments. XL drafted the manuscript.
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Li, X., Sun, J., Zhang, M. et al. The Effect of Salinity on Biofilm Formation and c-di-GMP Production in Vibrio parahaemolyticus. Curr Microbiol 79, 25 (2022). https://doi.org/10.1007/s00284-021-02723-2
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DOI: https://doi.org/10.1007/s00284-021-02723-2