Biofilms: an emergent form of bacterial life

Nature Reviews Microbiology, Год журнала: 2016, Номер 14(9), С. 563 - 575

Опубликована: Авг. 11, 2016

Язык: Английский

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Bioremediation 3.0: Engineering pollutant-removing bacteria in the times of systemic biology

Biotechnology Advances, Год журнала: 2017, Номер 35(7), С. 845 - 866

Опубликована: Авг. 5, 2017

Язык: Английский

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Anaerobic Degradation of Benzene and Polycyclic Aromatic Hydrocarbons

Microbial Physiology, Год журнала: 2016, Номер 26(1-3), С. 92 - 118

Опубликована: Янв. 1, 2016

Aromatic hydrocarbons such as benzene and polycyclic aromatic (PAHs) are very slowly degraded without molecular oxygen. Here, we review the recent advances in elucidation of first known degradation pathways these environmental hazards. Anaerobic PAHs has been successfully documented environment by metabolite analysis, compound-specific isotope analysis microcosm studies. Subsequently, also enrichments pure cultures were obtained that anaerobically degrade benzene, naphthalene or methylnaphthalene, even phenanthrene, largest PAH currently to be degradable under anoxic conditions. Although grow slowly, with doubling times around 2 weeks, produce only little biomass batch cultures, successful proteogenomic, transcriptomic biochemical studies revealed novel exciting reactions for example carboxylation ATP-independent reduction naphthoyl-coenzyme A. The anaerobic methylnaphthalene at genetic level now opens door studying metabolism ecology degraders. This will contribute assessing fate one most important contaminant classes sediments aquifers.

Язык: Английский

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Emergent Properties of Microbial Activity in Heterogeneous Soil Microenvironments: Different Research Approaches Are Slowly Converging, Yet Major Challenges Remain

Frontiers in Microbiology, Год журнала: 2018, Номер 9

Опубликована: Авг. 27, 2018

Over the last 60 years, soil microbiologists have accumulated a wealth of experimental data showing that usual bulk, macroscopic parameters used to characterize soils (e.g., granulometry, pH, organic matter and biomass contents) provide insufficient information describe quantitatively activity microorganisms some its outcomes, like emission greenhouse gases. Clearly, new, more appropriate are needed, which reflect better spatial heterogeneity at microscale (i.e., pore scale). For long time, spectroscopic microscopic tools were lacking quantify processes scale, but major technological advances over 15 years made suitable equipment available researchers. In this context, objective present article is review progress achieved date in significant research program has ensued. This can be rationalized as sequence steps, namely quantification modeling physical-, (bio)chemical-, microbiological properties soils, integration these different perspectives into unified theory, upscaling and, eventually, development new approaches measure characteristics. At stage, been on physical front, lesser extent (bio)chemical one well, both terms experiments modeling. microbial aspects, whereas lot work devoted bacterial fungal appropriateness model assumptions cannot readily assessed because relevant extremely scarce. overall move forward, it will crucial make sure components systems does not keep lagging behind Concerning subsequent steps program, very little various disciplinary occurred so far, result, researchers yet able tackle scaling up level. Many challenges, them daunting, remain path ahead.

Язык: Английский

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Factors Influencing the Bacterial Bioremediation of Hydrocarbon Contaminants in the Soil: Mechanisms and Impacts

Journal of Chemistry, Год журнала: 2021, Номер 2021, С. 1 - 17

Опубликована: Ноя. 15, 2021

The discharge of hydrocarbons and their derivatives to environments due human and/or natural activities cause environmental pollution (soil, water, air) affect the functioning an ecosystem. To minimize or eradicate by hydrocarbon contaminants, studies showed strategies including physical, chemical, biological approaches. Among those strategies, use techniques (especially bacterial biodegradation) is critically important remove contaminants. current review discusses insights major factors that enhance hinder bioremediation contaminants (aliphatic, aromatic, polyaromatic hydrocarbons) in soil. key limiting overall biodegradation are generally categorized as biotic abiotic factors. various factors, temperature range from 30 40°C, pH 5 8, moisture availability 90%, carbon/nitrogen/phosphorous (C/N/P; 100:20:1) ratio, 10–40% oxygen for aerobic degradation show positive correlation greatest rate altering microbial degradative enzymes In addition, formation biofilm production biosurfactants hydrocarbon-polluted soil increase adaptation low bioavailability hydrophobic compounds, genes encode critical potential microbes bioremediate soils contaminated with pollutants. Therefore, this works on identification effective biodegradation, understanding, optimization essential critical.

Язык: Английский

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Spatiotemporal successions of N, S, C, Fe, and As cycling genes in groundwater of a wetland ecosystem: Enhanced heterogeneity in wet season

Water Research, Год журнала: 2024, Номер 251, С. 121105 - 121105

Опубликована: Янв. 3, 2024

Язык: Английский

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Natural attenuation of sulfonamides and metabolites in contaminated groundwater – Review, advantages and challenges of current documentation techniques

Water Research, Год журнала: 2024, Номер 254, С. 121416 - 121416

Опубликована: Март 5, 2024

Sulfonamides are applied worldwide as antibiotics. They emerging contaminants of concern, their presence in the environment may lead to spread antibiotic resistance genes. present groundwater systems, which suggest persistence under certain conditions, highlighting importance understanding natural attenuation processes groundwater. Biodegradation is an essential process, degradation sulfonamides reduces risk spreading. In this review, attenuation, and particular assessment biodegradation, evaluated for systems. The current knowledge level on biodegradation reviewed, a scientific foundation built based sulfonamide processes, pathways, metabolites toxicity. An overview bacterial species related provided. main research effort has focused aerobic conditions while investigations anaerobic lacking. implementation laboratory scale; here we strived bridge towards field application assessment, by assessing approaches commonly used monitored attenuation. Methods document contaminant mass loss assessed be applicable sulfonamides, approach limited lack reference standards metabolites. Furthermore, additional information required relevant order improve assessments. Based it suggested use substituent-containing from breakage specific indicators degradation. Microbial currently available microbial community's capacities, however, more indigenous bacteria capable degrading impact environmental biodegradation. Compound stable isotope analysis shows great potential situ method, but further developments analyse at environmentally levels. Finally, scheme that can uncover some fate Nevertheless, there still unknowns well effect settings such redox conditions. Alongside, uncovering future research, applicability documentation will advance, provide step remedial concepts frequently detected sulfonamides.

Язык: Английский

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Pseudomonas putida KT2440: the long journey of a soil-dweller to become a synthetic biology chassis

Journal of Bacteriology, Год журнала: 2024, Номер 206(7)

Опубликована: Июль 8, 2024

Although members of the genus

Язык: Английский

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Compound-specific isotope analysis (CSIA) of micropollutants in the environment — current developments and future challenges

Current Opinion in Biotechnology, Год журнала: 2016, Номер 41, С. 60 - 72

Опубликована: Июнь 21, 2016

Over the last decade, occurrence of micropollutants in environment has become a worldwide issue increasing concern. Compound-specific stable-isotope analysis (CSIA) natural isotopic abundance may greatly enhance evaluation sources and transformation processes micropollutants, such as pesticides, personal care products or pharmaceuticals. We summarize recent advances from laboratory studies, review current limitations analytical challenges associated with low concentrations high polarity delineate potential micropolluant CSIA for field applications. highlight future prospects regarding source apportionment, identification biotic abiotic reactions on mechanistic level, well integrative degradation hot spots catchment scale. Such feed into framework risk assessment that includes CSIA.

Язык: Английский

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Effects of Secondary Plant Metabolites on Microbial Populations: Changes in Community Structure and Metabolic Activity in Contaminated Environments

International Journal of Molecular Sciences, Год журнала: 2016, Номер 17(8), С. 1205 - 1205

Опубликована: Июль 29, 2016

Secondary plant metabolites (SPMEs) play an important role in survival the environment and serve to establish ecological relationships between plants other organisms. Communication microorganisms via SPMEs contained root exudates or derived from litter decomposition is example of this phenomenon. In review, general aspects rhizodeposition together with significance terpenes phenolic compounds are discussed detail. We focus specifically on effect microbial community structure metabolic activity environments contaminated by polychlorinated biphenyls (PCBs) polyaromatic hydrocarbons (PAHs). Furthermore, a section devoted complex and/or their bioremediation sites. New insights introduced study evaluating effects during grapefruit peel, lemon pears bacterial communities ability degrade PCBs long-term soil. The presented review supports "secondary compound hypothesis" demonstrates potential for increasing effectiveness processes.

Язык: Английский

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