The Role of the Motility of Methylobacterium in Bacterial Interactions in Drinking Water

Tsagkari, E.; Sloan, William T.

doi:10.3390/w10101386

Cited by 10 publications

(8 citation statements)

References 52 publications

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“…5 ). Methylobacteria are commonly isolated from drinking water; they are reported to exhibit resistance to disinfectant/cleaning agents 13 , 40 , 47 , 48 , promote aggregation 46 , 49 and impact microbially-influenced-corrosion 50 . Possibly the genetic components implicating Methylobacteria in microbially influenced corrosion could increase the tendency of High-chlorine bacterial communities to oxidise iron (especially if shared via horizontal gene transfer).…”

Section: Resultsmentioning

confidence: 99%

Uncharted waters: the unintended impacts of residual chlorine on water quality and biofilms

Fish

Reeves‐McLaren

Husband

et al. 2020

npj Biofilms Microbiomes

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Disinfection residuals in drinking water protect water quality and public heath by limiting planktonic microbial regrowth during distribution. However, we do not consider the consequences and selective pressures of such residuals on the ubiquitous biofilms that persist on the vast internal surface area of drinking water distribution systems. Using a full scale experimental facility, integrated analyses were applied to determine the physical, chemical and biological impacts of different free chlorine regimes on biofilm characteristics (composition, structure and microbiome) and water quality. Unexpectedly, higher free chlorine concentrations resulted in greater water quality degredation, observable as elevated inorganic loading and greater discolouration (a major cause of water quality complaints and a mask for other failures). High-chlorine concentrations also reduced biofilm cell concentrations but selected for a distinct biofilm bacterial community and inorganic composition, presenting unique risks. The results challenge the assumption that a measurable free chlorine residual necessarily assures drinking water safety.

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Section: Resultsmentioning

confidence: 99%

Uncharted waters: the unintended impacts of residual chlorine on water quality and biofilms

Fish

Reeves‐McLaren

Husband

et al. 2020

npj Biofilms Microbiomes

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“…A large number of studies have shown that the addition of natural organic matter leads to changes in the aggregation of inorganic colloids. It has been found that the adsorption of bacteria onto the mineral surfaces is mainly affected by factors such as pH, ionic strength (Wu et al 2012), clay type (Bellou et al 2015), bacteria types and its cell surface properties (Poortinga et al 2002), bacteria growth cycle (Wu et al 2014), bacteria/mineral mass ratio (Yee et al 2000), and so on (Tsagkari & Sloan 2018). Many theories were used to explain these phenomena.…”

Section: Chemistry Journalsmentioning

confidence: 99%

Peer Review #1 of "Aggregation kinetics of binary systems containing kaolinite and Pseudomonas putida induced by different 1:1 electrolytes: specific ion effects (v0.1)"

2020

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Background. The interactions between colloidal particles in the binary system or mixture colloids containing clay minerals and bacteria have important influences on formations and stabilities of soil aggregates, transportations of soil water, as well as biological activities of microorganisms. How the interfacial reaction of metal ions affects their interaction therefore becomes an important scientific issue. Methods. Dynamic light scattering studies on the aggregation kinetics of mixture colloids containing kaolinite and Pseudomonas putida (P. putida) were conducted in this study. Results. Aggregation could be observed between kaolinite and kaolinite, between kaolinite and P. putida when P. putida content was less than 33.3%. Additionally, aggregation rates decreased with increasing P. putida content. The critical coagulation concentrations and activation energies indicated that there were strong specific ion effects on the aggregation of mixture colloids. Most importantly, the activation energy increased sharply with increasing P. putida content , which might result from the lower Hamaker constant of P. putida compared with that of kaolinite. Contributions. (1) Strong specific ion effects on mixture colloids aggregation of kaolinite-Pseudomonas putida were observed; (2) the aggregation behavior of mixture colloidal system was determined by the average effects of mixture colloids, rather than the specific component in mixture systems. This finding provides an important methodological guide for further studies on the colloidal aggregation behavior of mixture systems with organic and inorganic materials.

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“…Common algae taxa are centric and pennate diatoms, dinoflagellates and flagellates [24][25][26], whereas common bacterial taxa are pseudomonadota, actinobacteria, firmicutes and bacteroidetes [6,27]. Many of these microbes have different motility mechanisms [28,29] from swimming (e.g., Chlamydomonas nivalis [30] or Methylobacterium [6,31,32]) to gliding (e.g., diatoms [33,34] or Bacillus subtilis [19,35]), which can be used to assess their locomotion. Examples of biological proxies include diatoms [36] and bacteria colonies [37,38], reflecting a unique range of physical-biological interactions in the climate system.…”

Section: Introductionmentioning

confidence: 99%

Biolocomotion and Premelting in Ice

Vachier

Wettlaufer

2022

Front. Phys.

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Biota are found in glaciers, ice sheets and permafrost. Ice bound micro-organisms evolve in a complex mobile environment facilitated or hindered by a range of bulk and surface interactions. When a particle is embedded in a host solid near its bulk melting temperature, a melted film forms at the surface of the particle in a process known as interfacial premelting. Under a temperature gradient, the particle is driven by a thermomolecular pressure gradient toward regions of higher temperatures in a process called thermal regelation. When the host solid is ice and the particles are biota, thriving in their environment requires the development of strategies, such as producing exopolymeric substances (EPS) and antifreeze glycoproteins (AFP) that enhance the interfacial water. Therefore, thermal regelation is enhanced and modified by a process we term bio-enhanced premelting. Additionally, the motion of bioparticles is influenced by chemical gradients influenced by nutrients within the icy host body. We show how the overall trajectory of bioparticles is controlled by a competition between thermal regelation and directed biolocomotion. By re-casting this class of regelation phenomena in the stochastic framework of active Ornstein-Uhlenbeck dynamics, and using multiple scales analysis, we find that for an attractive (repulsive) nutrient source, that thermal regelation is enhanced (suppressed) by biolocomotion. This phenomena is important in astrobiology, the biosignatures of extremophiles and in terrestrial paleoclimatology.

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The Role of the Motility of Methylobacterium in Bacterial Interactions in Drinking Water

Cited by 10 publications

References 52 publications

Uncharted waters: the unintended impacts of residual chlorine on water quality and biofilms

Uncharted waters: the unintended impacts of residual chlorine on water quality and biofilms

Peer Review #1 of "Aggregation kinetics of binary systems containing kaolinite and Pseudomonas putida induced by different 1:1 electrolytes: specific ion effects (v0.1)"

Biolocomotion and Premelting in Ice

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