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Ralstonia pickettii

About: Ralstonia pickettii is a research topic. Over the lifetime, 228 publications have been published within this topic receiving 5866 citations. The topic is also known as: P. pickettii.


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Journal ArticleDOI
TL;DR: Based on the results of phenotypic characterization, cellular lipid and fatty acid analysis, phylogenetic analysis of 16S rDNA nucleotide sequences and rRNA‐DNA hybridization, Burkholderia pickettii, Burk holderia solanacearum and Alcaligenes eutrophus are transferred to the new genus Ralstonia, and RAlstonia pickettius (Ralston, Palleroni and Doudoroff 1973) comb.
Abstract: Based on the results of phenotypic characterization, cellular lipid and fatty acid analysis, phylogenetic analysis of 16S rDNA nucleotide sequences and rNA-DNA hybrization, Burkholderia pickettii, Burkholderia solanacearum and Alcaligenes eutrophus are transferred to the new genus Ralstonia, and Ralstonia pickettii (Ralston, Palleroni and Doudoroff 1973) comb. nov., Ralstonia solanacearum (Smith 1896) comb. nov., and R. eutropha (Davis 1969) comb. nov. are proposed. The type species of the new genus is R. pickettii. Type strain of R. pickettii is ATCC 27511T, of R. solanacearum is ATCC 10696T, and of R. eutropha is ATCC 17697T.

627 citations

Journal ArticleDOI
TL;DR: This demonstration that soil bacteria can sense and swim towards the toxic compounds toluene, benzene, TCE, and related chemicals suggests that the introduction of chemotactic bacteria into selected polluted sites may accelerate bioremediation processes.
Abstract: The bioremediation of polluted groundwater and toxic waste sites requires that bacteria come into close physical contact with pollutants. This can be accomplished by chemotaxis. Five motile strains of bacteria that use five different pathways to degrade toluene were tested for their ability to detect and swim towards this pollutant. Three of the five strains (Pseudomonas putida F1, Ralstonia pickettii PKO1, and Burkholderia cepacia G4) were attracted to toluene. In each case, the response was dependent on induction by growth with toluene. Pseudomonas mendocina KR1 and P. putida PaW15 did not show a convincing response. The chemotactic responses of P. putida F1 to a variety of toxic aromatic hydrocarbons and chlorinated aliphatic compounds were examined. Compounds that are growth substrates for P. putida F1, including benzene and ethylbenzene, were chemoattractants. P. putida F1 was also attracted to trichloroethylene (TCE), which is not a growth substrate but is dechlorinated and detoxified by P. putida F1. Mutant strains of P. putida F1 that do not oxidize toluene were attracted to toluene, indicating that toluene itself and not a metabolite was the compound detected. The two-component response regulator pair TodS and TodT, which control expression of the toluene degradation genes in P. putida F1, were required for the response. This demonstration that soil bacteria can sense and swim towards the toxic compounds toluene, benzene, TCE, and related chemicals suggests that the introduction of chemotactic bacteria into selected polluted sites may accelerate bioremediation processes.

227 citations

Journal ArticleDOI
TL;DR: Comparative 16S rDNA sequence analysis indicates that two distinct sublineages, with a sequence dissimilarity of >4 % (bootstrap value, 100 %), exist within the genus RALSTONIA, and it is proposed that Pseudomonas syzygii should be renamed Ralstonia syzyGii comb.
Abstract: Comparative 16S rDNA sequence analysis indicates that two distinct sublineages, with a sequence dissimilarity of >4 % (bootstrap value, 100 %), exist within the genus Ralstonia: the Ralstonia eutropha lineage, which comprises Ralstonia basilensis, Ralstonia campinensis, R. eutropha, Ralstonia gilardii, Ralstonia metallidurans, Ralstonia oxalatica, Ralstonia paucula, Ralstonia respiraculi and Ralstonia taiwanensis; and the Ralstonia pickettii lineage, which comprises Ralstonia insidiosa, Ralstonia mannitolilytica, R. pickettii, Ralstonia solanacearum and Ralstonia syzygii comb. nov. (previously Pseudomonas syzygii). This phylogenetic discrimination is supported by phenotypic differences. Members of the R. eutropha lineage have peritrichous flagella, do not produce acids from glucose and are susceptible to colistin, in contrast to members of the R. pickettii lineage, which have one or more polar flagella, produce acid from several carbohydrates and are colistin-resistant. Members of the R. pickettii lineage are viable for up to 6 days on tryptic soy agar at 25 °C, whereas members of the R. eutropha lineage are viable for longer than 9 days. It is proposed that species of the R. eutropha lineage should be classified in a novel genus, Wautersia gen. nov. Finally, based on the literature and new DNA–DNA hybridization data, it is proposed that Pseudomonas syzygii should be renamed Ralstonia syzygii comb. nov.

214 citations

Journal ArticleDOI
TL;DR: This is the first study to definitively show the role of monooxygenases in dioxane degradation using several independent lines of evidence and to describe the kinetics of metabolic and cometabolic doxane degradation.
Abstract: 1,4-Dioxane is a probable human carcinogen, and an important emerging water contaminant. In this study, the biodegradation of dioxane by 20 bacterial isolates was evaluated, and 13 were found to be capable of transforming dioxane. Dioxane served as a growth substrate for Pseudonocardia dioxanivorans CB1190 and Pseudonocardia benzenivorans B5, with yields of 0.09 g protein g dioxane-1 and 0.03 g protein g dioxane-1, respectively. Cometabolic transformation of dioxane was observed for monooxygenase-expressing strains that were induced with methane, propane, tetrahydrofuran, or toluene including Methylosinus trichosporium OB3b, Mycobacterium vaccae JOB5, Pseudonocardia K1, Pseudomonas mendocina KR1, Ralstonia pickettii PKO1, Burkholderia cepacia G4, and Rhodococcus RR1. Product toxicity resulted in incomplete dioxane degradation for many of the cometabolic reactions. Brief exposure to acetylene, a known monooxygenase inhibitor, prevented oxidation of dioxane in all cases, supporting the hypothesis that monoo...

202 citations

Journal ArticleDOI
TL;DR: The bacterial genus Ralstonia (Gram-negative non-fermenters) is becoming more prevalent in cases of infection with three bacterial species, RAlstonia pickettii, Ralstoneia insidiosa and RalSTONia mannitolilytica, making up all cases reported (in the literature) to date.
Abstract: The bacterial genus Ralstonia (Gram-negative non-fermenters) is becoming more prevalent in cases of infection with three bacterial species, Ralstonia pickettii, Ralstonia insidiosa and Ralstonia mannitolilytica, making up all cases reported (in the literature) to date. These organisms are prevalent in many different types of water supplies (including hospital water supplies), being well adapted to survive in low-nutrient conditions. They have been shown to cause infections, sometimes serious, such as osteomyelitis and meningitis, in hospital settings. Seventy cases of R. pickettii, 13 cases of R. mannitolilytica and three cases of R. insidiosa infection have been identified from the literature. Insight is given into the types of infections that are caused by these bacteria, the underlying conditions that are associated with these infections and potential treatments.

158 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202114
20207
20199
20188
20178
201611