Formation of chloroform and tetrachloroethene by <i>Sinorhizobium meliloti</i>
 strain 1021

Weigold, Pascal; Ruecker, Alexander; Jochmann, Maik A.; Barajas, Xochitli L. Osorio; Lege, Sascha; Zwiener, Christian; Kappler, Andreas; Behrens, Sebastian

doi:10.1111/lam.12462

Cited by 6 publications

(4 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The soil bacterium Sinorhizobium meliloti (strain 1021) was recently shown to produce tetrachloroethene (PCE) ( 7 ), one of the most important industrial contaminants. This is an important finding considering the rarity of reports of PCE biosynthesis and widespread occurrence of S. meliloti as a common soil bacterium (Weigold et al ., ). Another recalcitrant organohalogen, chloroform, is mainly produced naturally in various aquatic and terrestrial ecosystems and has received increasing attention due to its destructive impact on the ozone layer (Hossaini et al ., ).…”

Section: Natural Sources Of Organohalogens: An Updatementioning

confidence: 97%

Organohalide respiration in pristine environments: implications for the natural halogen cycle

Atashgahi

Häggblom

Smidt

2017

Environmental Microbiology

View full text Add to dashboard Cite

Summary Halogenated organic compounds, also termed organohalogens, were initially considered to be of almost exclusively anthropogenic origin. However, over 5000 naturally synthesized organohalogens are known today. This has also fuelled the hypothesis that the natural and ancient origin of organohalogens could have primed development of metabolic machineries for their degradation, especially in microorganisms. Among these, a special group of anaerobic microorganisms was discovered that could conserve energy by reducing organohalogens as terminal electron acceptor in a process termed organohalide respiration. Originally discovered in a quest for biodegradation of anthropogenic organohalogens, these organohalide‐respiring bacteria (OHRB) were soon found to reside in pristine environments, such as the deep subseafloor and Arctic tundra soil with limited/no connections to anthropogenic activities. As such, accumulating evidence suggests an important role of OHRB in local natural halogen cycles, presumably taking advantage of natural organohalogens. In this minireview, we integrate current knowledge regarding the natural origin and occurrence of industrially important organohalogens and the evolution and spread of OHRB, and describe potential implications for natural halogen and carbon cycles.

show abstract

Section: Natural Sources Of Organohalogens: An Updatementioning

confidence: 97%

Organohalide respiration in pristine environments: implications for the natural halogen cycle

Atashgahi

Häggblom

Smidt

2017

Environmental Microbiology

View full text Add to dashboard Cite

show abstract

“…Additionally, Cl-NOM is thought to be present at low concentrations in most soils and sediments, often as a function of chloride concentration (Johansson et al, 2003; Öberg and Sandén, 2005), made predominantly by fungi, bacteria, and plants, and in some cases via abiotic reactions (Asplund and Grimvall, 1991; Öberg and Grøn, 1998; Keppler et al, 2000; Keppler et al, 2002; Myneni, 2002; Bastviken et al, 2009; Vodyanitskii and Makarov, 2017). Cl-NOM is known to consist of over 5,000 different chemical structures (Gribble, 1992; Gribble, 2010), and can even include structures typical of contaminants, including trichloroethene (Abrahamsson et al, 1995), vinyl chloride (Keppler et al, 2002), tetrachloroethene (Weigold et al, 2015), and chlorinated phenols (Hoekstra et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Presence, Diversity, and Enrichment of Respiratory Reductive Dehalogenase and Non-respiratory Hydrolytic and Oxidative Dehalogenase Genes in Terrestrial Environments

2019

View full text Add to dashboard Cite

Organohalide-respiring bacteria have been linked to the cycling and possible respiration of chlorinated natural organic matter (Cl-NOM) in uncontaminated soils and sediments. The importance of non-respiratory hydrolytic/oxidative dechlorination processes in the cycling of Cl-NOM in terrestrial soil and sediment, however, is still not understood. This research analyzes the dechlorination potential of terrestrial systems through analysis of the metagenomes of urban lake sediments and cultures enriched with Cl-NOM. Even with the variability in sample type and enrichment conditions, the potential to dechlorinate was universal, with reductive dehalogenase genes and hydrolytic or oxidative dehalogenase genes found in all samples analyzed. The reductive dehalogenase genes detected grouped taxonomically with those from organohalide-respiring bacteria with broad metabolic capabilities, as opposed to those that obligately respire organohalides. Furthermore, reductive dehalogenase genes and two haloacid dehalogenase genes increased in abundance when sediment was enriched with high concentrations of Cl-NOM. Our data suggests that both respiratory and non-respiratory dechlorination processes are important for Cl-NOM cycling, and that non-obligate organohalide-respiring bacteria are most likely involved in these processes.

show abstract

“…These organic and inorganic halogens can be synthesized as well as degraded by microorganisms (also known as organohalide-respiring bacteria (OHRB)) where such compounds are utilized as electron donors or acceptors for microbial growth. Microorganisms like Pseudoalteromonas phenolica [85] and Sinorhizobium meliloti strain 1021 [86], Dehalobium chlorocoercia are known to produce some of the naturally occurring organohalogens in a marine environment. Quorum sensing mediated formation of biofilm has been also shown to degrade POPs via solubilization and biotransformation [87].…”

Section: Bioremediation Of Persistent Organic Pollutants (Pops)mentioning

confidence: 99%

Microbial Journey: Mount Everest to Mars

et al. 2022

View full text Add to dashboard Cite

A rigorous exploration of microbial diversity has revealed its presence on Earth, deep oceans, and vast space. The presence of microbial life in diverse environmental conditions, ranging from moderate to extreme temperature, pH, salinity, oxygen, radiations, and altitudes, has provided the necessary impetus to search for them by extending the limits of their habitats. Microbiology started as a distinct science in the mid-nineteenth century and has provided inputs for the betterment of mankind during the last 150 years. As beneficial microbes are assets and pathogens are detrimental, studying both have its own merits. Scientists are nowadays working on illustrating the microbial dynamics in Earth's subsurface, deep sea, and polar & Vipin Chandra Kalia

show abstract

Formation of chloroform and tetrachloroethene by Sinorhizobium meliloti strain 1021

Cited by 6 publications

References 38 publications

Organohalide respiration in pristine environments: implications for the natural halogen cycle

Organohalide respiration in pristine environments: implications for the natural halogen cycle

Presence, Diversity, and Enrichment of Respiratory Reductive Dehalogenase and Non-respiratory Hydrolytic and Oxidative Dehalogenase Genes in Terrestrial Environments

Microbial Journey: Mount Everest to Mars

Contact Info

Product

Resources

About