Bacterial adaptation to cold

Bárria, Cátia; Małecki, Michał; Arraiano, Cecília M.

doi:10.1099/mic.0.052209-0

Cited by 255 publications

(223 citation statements)

References 48 publications

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“…S4). These observations are in accord with previous reports by Barria et al (2013), who found that protein synthesis was induced after cold shock at temperatures below the optimum value for the specified bacterial genera. Hydrophobicity changes in the granules further supported the measured increase in protein content at low temperature (Fig.…”

Section: Temperature Impactsupporting

confidence: 95%

Resilience of sulfate-reducing granular sludge against temperature, pH, oxygen, nitrite, and free nitrous acid

Hao

Mackey

Guo

et al. 2016

Appl Microbiol Biotechnol

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Sulfate-reducing granular sludge has recently been developed and characterized in detail as part of the development of the sulfate reduction, autotrophic denitrification, nitrification integrated (SANI) process. However, information regarding temperature of granules to environmental fluctuation is lacking, an aspect that is important in dealing with real wastewater. A comprehensive assessment of sulfate-reducing granular sludge performance under various environmental conditions was thus conducted in this study, including temperature, pH, oxygen, nitrite, and free nitrous acid (FNA) as possible encountering conditions in the removal of organics and/or nitrate. Specific chemical oxygen demand removal rate of the granules was determined to be reduced by 65 % when the temperature varied between 10-15 °C, reduced by 70 % when dissolved oxygen (DO) was 0.5 mg/L or greater, and at least, reduced by 75 % when nitrite was 30 mg N/L or above. Nevertheless, the sludge activity recovered by 82, 100, and 86 % from exposure to high oxygen and nitrite and low temperature levels, respectively. Combined inhibition of nitrite and FNA on the sludge is strong and complex, while FNA alone reduced cell viability from 60 to 40 % when its concentration increased to 2.3 mg N/L. The present study demonstrates that sulfate-reducing bacteria (SRB) granules possess high resilience against varying environmental conditions, showing the high application potential of sulfate-reducing granular sludge in dealing with brackish and saline industrial or domestic wastewaters.

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Section: Temperature Impactsupporting

confidence: 95%

Resilience of sulfate-reducing granular sludge against temperature, pH, oxygen, nitrite, and free nitrous acid

Hao

Mackey

Guo

et al. 2016

Appl Microbiol Biotechnol

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“…In this study, the stress encountered from the first 24 h storage cycle in the cold environment could lead to the increased resistance to ACP treatment. Cells embedded in the 48 h biofilms could possibly adapt to the low temperature and resume expression of non-cold inducible proteins (Barria et al, 2013), which could explain higher reduction levels of bacterial populations in 48 h biofilms achieved after treatment. However, further investigation of the bacterial adaptation to change in the environmental conditions and the corresponding bacterial response to ACP treatment may provide important information and help in future…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

Cold plasma inactivation of internalised bacteria and biofilms for Salmonella enterica serovar Typhimurium, Listeria monocytogenes and Escherichia coli

Ziuzina¹,

Han²,

Cullen

et al. 2015

International Journal of Food Microbiology

162

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Microbial biofilms and bacteria internalised in produce tissue may reduce the effectiveness of decontamination methods. In this study, the inactivation efficacy of in-package atmospheric cold plasma (ACP) afterglow was investigated against Salmonella Typhimurium, Listeria monocytogenes and Escherichia coli in the forms of planktonic cultures, biofilms formed on lettuce and associated bacteria internalised in lettuce tissue. Prepared lettuce broth (3%) was inoculated with bacteria resulting in a final concentration of ~7.0 log 10 CFU/ml. For biofilm formation and internalisation, lettuce pieces (5 x 5 cm) were dip-inoculated in bacterial suspension of ~7.0 log 10 CFU/ml for 2 h and further incubated for 0, 24 and 48 h at either 4°C or room temperature (~22°C) in combination with light/dark photoperiod or at 4°C under dark conditions. Inoculated samples were sealed inside a rigid polypropylene container and However, the existence of biofilms and internalised bacteria should be considered for further optimisation of ACP treatment parameters in order to achieve an effective control of the realistic challenges posed by foodborne pathogens.

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“…Following an acclimation phase, however, E. coli adapts to the low temperature and resumes growth at a lower rate. The expression of the cold shock proteins declines in this phase, and bulk protein synthesis restarts at levels characteristic of the lower growth rate (65). The group of genes that are relatively highly expressed at low temperatures includes the genes encoding proteins needed for modulation of cell membrane, the genes for RNA metabolism and degradation, and the genes coding for some of the Csp family of transcription factors (CspA and CspE), the transcription termination factor NusA, and the stationary-phase-specific sigma factor RpoS, which regulates more than half of the genes expressed at low temperatures (66).…”

Section: Figmentioning

confidence: 99%

Intracellular Concentrations of 65 Species of Transcription Factors with Known Regulatory Functions in Escherichia coli

et al. 2014

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The expression pattern of the Escherichia coli genome is controlled in part by regulating the utilization of a limited number of RNA polymerases among a total of its approximately 4,600 genes. The distribution pattern of RNA polymerase changes from modulation of two types of protein-protein interactions: the interaction of core RNA polymerase with seven species of the sigma subunit for differential promoter recognition and the interaction of RNA polymerase holoenzyme with about 300 different species of transcription factors (TFs) with regulatory functions. We have been involved in the systematic search for the target promoters recognized by each sigma factor and each TF using the newly developed Genomic SELEX system. In parallel, we developed the promoter-specific (PS)-TF screening system for identification of the whole set of TFs involved in regulation of each promoter. Understanding the regulation of genome transcription also requires knowing the intracellular concentrations of the sigma subunits and TFs under various growth conditions. This report describes the intracellular levels of 65 species of TF with known function in E. coli K-12 W3110 at various phases of cell growth and at various temperatures. The list of intracellular concentrations of the sigma factors and TFs provides a community resource for understanding the transcription regulation of E. coli under various stressful conditions in nature.

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Bacterial adaptation to cold

Cited by 255 publications

References 48 publications

Resilience of sulfate-reducing granular sludge against temperature, pH, oxygen, nitrite, and free nitrous acid

Resilience of sulfate-reducing granular sludge against temperature, pH, oxygen, nitrite, and free nitrous acid

Cold plasma inactivation of internalised bacteria and biofilms for Salmonella enterica serovar Typhimurium, Listeria monocytogenes and Escherichia coli

Intracellular Concentrations of 65 Species of Transcription Factors with Known Regulatory Functions in Escherichia coli

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