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Fortschritte Der Chemie Organischer... 2004
Comparative Study Review
Topics: Agriculture; Anti-Bacterial Agents; Biological Transport; Cell Membrane; Environment; Fluorescence; Iron; Magnetic Resonance Spectroscopy; Mass Spectrometry; Metals; Molecular Structure; Oligopeptides; Peptides; Pigments, Biological; Pseudomonadaceae; Pseudomonas; Siderophores
PubMed: 15079896
DOI: 10.1007/978-3-7091-0581-8_2 -
Microbiology Spectrum Aug 2023Ginseng is a popular medicinal herb with established therapeutic effects such as cardiovascular disease prevention, anticancer effects, and anti-inflammatory effects....
Ginseng is a popular medicinal herb with established therapeutic effects such as cardiovascular disease prevention, anticancer effects, and anti-inflammatory effects. However, the slow growth of ginseng due to soilborne pathogens has been a challenge for establishing new plantations. In this study, we investigated root rot disease associated with the microbiota in a ginseng monoculture model system. Our results showed that a collapse of the early microbiota community inhibiting root rot disease was observed before the disease became severe, and nitrogen fixation was necessary to support the initial microbiota community structure. Furthermore, changes in the nitrogen composition were essential for the suppression of pathogen activity in early monoculture soils. We hypothesize that , a population built up by aspartic acid, can inhibit the occurrence of root rot disease in ginseng and that specific management practices that maintain a healthy microbiome can be implemented to prevent and mitigate the disease. Our findings provide insights into the potential use of specific members of the microbiota for controlling root rot disease in ginseng cultivation. Understanding the initial soil microbiota and community shifts in a monoculture system is critical for developing disease-suppressive soils for crop production. The lack of resistance genes against soilborne pathogens in plants highlights the need for effective management strategies. Our investigation of root rot disease and initial microbiota community shifts in a ginseng monoculture model system provides valuable insight into the development of conducive soil into specific suppressive soil. With a thorough understanding of the microbiota in disease-conducive soil, we can work toward the development of disease-suppressive soil to prevent outbreaks and ensure sustainable crop production.
Topics: Soil; Pseudomonadaceae; Soil Microbiology; Plant Diseases; Panax
PubMed: 37404179
DOI: 10.1128/spectrum.01150-23 -
Journal of Applied Oral Science :... 2009The aim of this study was to correlate the presence of Enterobacteriaceae, Pseudomonadaceae, Moraxellaceae and Xanthomonadaceae on the posterior dorsum of the human...
OBJECTIVE
The aim of this study was to correlate the presence of Enterobacteriaceae, Pseudomonadaceae, Moraxellaceae and Xanthomonadaceae on the posterior dorsum of the human tongue with the presence of tongue coating, gender, age, smoking habit and denture use.
MATERIAL AND METHODS
Bacteria were isolated from the posterior tongue dorsum of 100 individuals in MacConkey agar medium and were identified by the API 20E system (Biolab-Mérieux).
RESULTS
43% of the individuals, presented the target microorganisms on the tongue dorsum, with greater prevalence among individuals between 40 and 50 years of age (p = 0.001) and non-smokers (p=0.0485).
CONCLUSIONS
A higher prevalence of Enterobacteriaceae and Pseudomonadaceae was observed on the tongue dorsum of the individuals evaluated. There was no correlation between these species and the presence and thickness of tongue coating, gender and presence of dentures.
Topics: Adult; Age Factors; Colony Count, Microbial; Denture, Complete; Denture, Partial, Fixed; Denture, Partial, Removable; Dentures; Enterobacter cloacae; Enterobacteriaceae; Female; Halitosis; Humans; Male; Mannheimia haemolytica; Middle Aged; Moraxellaceae; Oral Hygiene; Pasteurella pneumotropica; Pseudomonadaceae; Smoking; Tongue; Xanthomonadaceae
PubMed: 19936511
DOI: 10.1590/s1678-77572009000500005 -
Viruses Jan 2022The phyllosphere microbiome plays an important role in plant fitness. Recently, bacteriophages have been shown to play a role in shaping the bacterial community...
The phyllosphere microbiome plays an important role in plant fitness. Recently, bacteriophages have been shown to play a role in shaping the bacterial community composition of the phyllosphere. However, no studies on the diversity and abundance of phyllosphere bacteriophage communities have been carried out until now. In this study, we extracted, sequenced, and characterized the dsDNA and ssDNA viral community from a phyllosphere for the first time. We sampled leaves from winter wheat (), where we identified a total of 876 virus operational taxonomic units (vOTUs), mostly predicted to be bacteriophages with a lytic lifestyle. Remarkably, 848 of these vOTUs corresponded to new viral species, and we estimated a minimum of 2.0 × 10 viral particles per leaf. These results suggest that the wheat phyllosphere harbors a large and active community of novel bacterial viruses. Phylloviruses have potential applications as biocontrol agents against phytopathogenic bacteria or as microbiome modulators to increase plant growth-promoting bacteria.
Topics: Bacteriophages; Genome, Viral; Metagenome; Microbiota; Plant Leaves; Pseudomonadaceae; Toxins, Biological; Triticum
PubMed: 35215838
DOI: 10.3390/v14020244 -
Mayo Clinic Proceedings Feb 1983Cephalosporin antibiotics are bactericidal against most gram-positive cocci and gram-negative bacilli of clinical importance. They are relatively nontoxic but like the...
Cephalosporin antibiotics are bactericidal against most gram-positive cocci and gram-negative bacilli of clinical importance. They are relatively nontoxic but like the penicillins may cause hypersensitivity reactions. Agents with clinically advantageous pharmacokinetics include cefazolin, moxalactam, and cefadroxil. First-generation cephalosporins are indicated for surgical prophylaxis and for treatment of most staphylococcal and streptococcal infections in patients who are allergic to penicillins. Activity against gram-negative bacilli increases from first- to third-generation drugs, but sensitive isolates should be treated with first-generation agents to prevent resistance to newer cephalosporins and to minimize the expense for the patient. Treatment of Bacteroides fragilis and Pseudomonas aeruginosa infections is not entirely satisfactory with currently available agents. No cephalosporin is active against the enterococci, and superinfection with these organisms has occurred during treatment with moxalactam. Some experimental cephalosporins have improved activity against P. aeruginosa and gram-negative bacilli that are resistant to multiple drugs. A few of these agents have a very long half-life. It is likely that cephalosporin antibiotics will continue to proliferate.
Topics: Acinetobacter; Bacterial Infections; Cephalosporins; Chemical Phenomena; Chemistry; Cost-Benefit Analysis; Dose-Response Relationship, Drug; Enterobacteriaceae; Humans; Infusions, Parenteral; Kinetics; Microbial Sensitivity Tests; Pseudomonadaceae
PubMed: 6401833
DOI: No ID Found -
International Journal of Systematic and... Sep 2021The evolutionary relationships among species of the family were examined based on 255 available genomes representing >85 % of the species from this family. In a...
Phylogenomic and comparative genomic analyses of species of the family : Proposals for the genera gen. nov. and gen. nov., merger of the genus with the genus , and transfer of some misclassified species of the genus into other genera.
The evolutionary relationships among species of the family were examined based on 255 available genomes representing >85 % of the species from this family. In a phylogenetic tree based on concatenated sequences of 118 core proteins, most species of the genus grouped within one large cluster which also included members of the genera and . Within this large cluster 18-30 clades/subclades of species of the genus consisting of between 1 and 36 species, were observed. However, a number of species of the genus branched outside of this main cluster and were interspersed among other genera of the family . This included a strongly supported clade (Pertucinogena clade) consisting of 19 mainly halotolerant species. The distinctness of this clade from all other members of the family is strongly supported by 24 conserved signature indels (CSIs) in diverse proteins that are exclusively found in all members of this clade. Nine uncharacterized members of the genus also shared these CSIs and they branched within the Pertucinogena clade, indicating their affiliation to this clade. On the basis of the strong evidence supporting the distinctness of the Pertucinogena clade, we are proposing transfer of species from this clade into a novel genus gen. nov. also branches outside of the main cluster and groups reliably with and . Six identified CSIs are uniquely shared by these three species and we are proposing their integration into the emended genus , which has priority over the name . We are also proposing transfer of the deep-branching , for which 22 exclusive CSIs have been identified, into the genus gen. nov. Lastly, we present strong evidence that the species and are misclassified into the genus and that they are specifically related to the genera and , respectively. In addition, we are also reclassifying ' as sp. nov. (Type strain: G-6302=ATCC 31363=BCRC 13035).
Topics: Bacterial Typing Techniques; Base Composition; DNA, Bacterial; Fatty Acids; Genomics; Phylogeny; Pseudomonadaceae; Pseudomonas; RNA, Ribosomal, 16S; Sequence Analysis, DNA; Xanthomonas
PubMed: 34546867
DOI: 10.1099/ijsem.0.005011 -
Nature Sep 1966
Topics: Aldehydes; Enterobacteriaceae; Hexoses; Hydrazines; Pseudomonas
PubMed: 5970108
DOI: 10.1038/2111097a0 -
Molecular Microbiology Jul 1990In this review, we describe the outer membrane proteins of Pseudomonas aeruginosa and related strains from the Pseudomonas fluorescens rRNA homology group of the... (Review)
Review
In this review, we describe the outer membrane proteins of Pseudomonas aeruginosa and related strains from the Pseudomonas fluorescens rRNA homology group of the Pseudomonadaceae, with emphasis on the physiological function and biochemical characteristics of these proteins. The use of opr (for outer membrane protein) is proposed as the genetic designation for the P. aeruginosa outer membrane proteins and letters are assigned, in conjunction with this designation, to known outer membrane proteins. Proteins whose primary functions involve pore formation, transport of specific substrates, cell structure determination and membrane stabilization are discussed. The conservation of selected proteins in the above Pseudomonas species is also examined.
Topics: Bacterial Outer Membrane Proteins; Biological Transport; Genes, Bacterial; Pseudomonas; Pseudomonas aeruginosa; RNA, Bacterial; RNA, Ribosomal
PubMed: 1700255
DOI: 10.1111/j.1365-2958.1990.tb00680.x -
International Journal of Systematic and... Jan 2020The honey bee gut microbiota contains many bacterial lineages that are specific to this ecosystem. , raised across the Asian continent, is of great significance to the...
The honey bee gut microbiota contains many bacterial lineages that are specific to this ecosystem. , raised across the Asian continent, is of great significance to the maintenance and development of ecology and agriculture in Asia. Here, we report the isolation and characterization of strain QZS01 from the gut of from Pingwu County, Sichuan Province, PR China. The results of phylogenetic analysis based on 16S rRNA sequences showed that strain QZS01 forms a monophyletic group together with clone sequences derived from variable insect hosts, and it shows 92% sequence similarity to its closest relative, . Strain QZS01 possesses a reduced genome (3.3 Mbp; G+C content, 38.05 mol%) compared to all other species, and the whole-genome based phylogenetic reconstruction showed that strain QZS01 represents a novel genus within the family . Strain QZS01 is a Gram-stain-negative facultative anaerobe. It grows on brain heart infusion agar and the energy sources utilized for growth are very limited. Based on the results of genotypic and phenotypic analyses, we propose a novel genus and species, gen. nov., sp. nov., with the type strain QZS01 (=CGMCC 1.13498=KCTC 62495).
Topics: Animals; Bacterial Typing Techniques; Base Composition; Bees; China; DNA, Bacterial; Fatty Acids; Gastrointestinal Tract; Genome, Bacterial; Phylogeny; Pseudomonadaceae; RNA, Ribosomal, 16S; Sequence Analysis, DNA
PubMed: 31560340
DOI: 10.1099/ijsem.0.003731 -
FEMS Microbiology Reviews Mar 2006Bacteria use small signal molecules in order to monitor their population density and coordinate gene regulation in a process called quorum sensing. In Gram-negative... (Review)
Review
Bacteria use small signal molecules in order to monitor their population density and coordinate gene regulation in a process called quorum sensing. In Gram-negative bacteria, the most common signal molecules are acylated homoserine lactones. Several Pseudomonas species produce acylated homoserine lactones that control important functions including pathogenicity and plant growth promotion. Many reports indicate that the quorum sensing systems of Pseudomonas are significantly regulated and interconnected with regulons of other global regulators. The integration of quorum sensing into additional regulatory circuits increases the range of environmental and metabolic signals beyond that of cell density, as well as further tuning the timing of the response. This review will focus on the regulation of quorum sensing in Pseudomonas, highlighting a complex response that might serve a given species to adapt in its particular environment.
Topics: Bacterial Physiological Phenomena; Bacterial Proteins; Gene Expression Regulation, Bacterial; Pseudomonas; Pseudomonas aeruginosa; Signal Transduction
PubMed: 16472307
DOI: 10.1111/j.1574-6976.2005.00012.x