DOCSLIB.ORG

Common Features of Environmental and Potentially Beneficial Plant-Associated Burkholderia

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Common Features of Environmental and Potentially Beneficial Plant-Associated Burkholderia Microb Ecol (2012) 63:249–266 DOI 10.1007/s00248-011-9929-1 MINIREVIEW Common Features of Environmental and Potentially Beneficial Plant-Associated Burkholderia Zulma Rocío Suárez-Moreno & Jesús Caballero-Mellado & Bruna G. Coutinho & Lucia Mendonça-Previato & Euan K. James & Vittorio Venturi Received: 28 March 2011 /Accepted: 1 August 2011 /Published online: 18 August 2011 # Springer Science+Business Media, LLC 2011 Abstract The genus Burkholderia comprises more than 60 highlighted the division of the genus into two main clusters, species isolated from a wide range of niches. Although they as suggested by phylogenetical analyses. The first cluster have been shown to be diverse and ubiquitously distributed, includes human, animal, and plant pathogens, such as most studies have thus far focused on the pathogenic Burkholderia glumae, Burkholderia pseudomallei,and species due to their clinical importance. However, the Burkholderia mallei, as well as the 17 defined species of increasing number of recently described Burkholderia the Burkholderia cepacia complex, while the other, more species associated with plants or with the environment has recently established cluster comprises more than 30 non- pathogenic species, which in most cases have been found to Jesús Caballero-Mellado deceased be associated with plants, and thus might be considered to be potentially beneficial. Several species from the latter Z. R. Suárez-Moreno : B. G. Coutinho : V. Venturi (*) Bacteriology Group, International Centre for group share characteristics that are of use when associating Genetic Engineering & Biotechnology, with plants, such as a quorum sensing system, the presence Padriciano 99, of nitrogen fixation and/or nodulation genes, and the ability 34149 Trieste, Italy to degrade aromatic compounds. This review examines the e-mail: [email protected] commonalities in this growing subgroup of Burkholderia Z. R. Suárez-Moreno species and discusses their prospective biotechnological University of Medicine and Dentistry of New Jersey, applications. 225 Warren Street, Newark, NJ 07103, USA J. Caballero-Mellado Introduction Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Burkholderia was first proposed as a genus in 1992 by Ap Postal 565-A Cuernavaca, Morelos, México Yabuuchi et al., and it comprised several species that had L. Mendonça-Previato been originally classified as Pseudomonas and Bacilli Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da [161]. It was named after the American phytopathologist Saúde, Universidade Federal do Rio de Janeiro, Walter Burkholder, who, in 1942, described the first Bloco G, 21944-970, Cidade Universitária, Ilha do Fundão, “ ” Rio de Janeiro, RJ, Brazil Burkholderia species, Phytomonas caryophylli and Phy- tomonas alliicola, as pathogens of carnation and onion, E. K. James respectively [23]. In 1950, Burkholder reported that the EPI Division, The James Hutton Institute, causal agent of sour skin in onion was Pseudomonas cepacia Invergowrie, Dundee DD2 5DA, UK [22], and this species would then become the type species of the current genus, acquiring several names through the years, B. G. Coutinho such as the “eugonic oxidizers group 1” [97], Pseudomonas The Capes Foundation, kingii [73], and Pseudomonas multivorans [135], but with Ministry of Education of Brazil, Cx postal 250, the name P. cepacia finally being revived as it had priority Brasilia, DF 70.040-020, Brazil according to taxonomic rules [11]. 250 Z.R. Suárez-Moreno et al. For a number of years, these bacteria continued to be Today, the Burkholderia genus comprises 62 validly recognized as members of the non-fluorescent pseudomo- described species, and their taxonomy has been continu- nads. In 1966, comprehensive studies of the pseudomonads ously revised. Phylogenetic trees inferred from independent were performed that highlighted the overall similarity of the gene sequence analysis (16S rRNA, recA, gyrB, rpoB, so-called mallei–pseudomallei group by comparing several acdS) have repeatedly shown divisions within the genus phenotypic traits [118, 135]. Palleroni and co-workers with significant bootstrap values (>90) [57, 105, 110, 111, recognized the taxonomic heterogeneity among the pseu- 140]. Taken together, these analyses suggest two main domonads and delineated five species homology groups clusters may be distinguished within the genus Burkholde- based on rRNA–DNA hybridization experiments [108]. ria (Fig. 1). One cluster comprises the B. cepacia complex This led to the subdivision of the genus Pseudomonas into (BCC), the “pseudomallei” group, and plant pathogens, as five well-defined rRNA homology groups, warranting at well as endosymbiotic species from phytopathogenic fungi, least five independent generic designations. Later, polypha- whereas the second cluster contains non-pathogenic Bur- sic taxonomy analyses, including 16S rRNA sequence data, kholderia species associated with plants and/or the envi- DNA–DNA hybridization, and fatty acid analysis, provided ronment. This clustering is consistent with groupings sufficient grounds for the creation of the Burkholderia derived from multilocus sequence typing and whole genus to accommodate the seven species of the rRNA genome analysis, in which species from the plant- group II (P. cepacia, P. caryophylli, Pseudomonas gladioli, associated nitrogen-fixing group (e.g., Burkholderia xen- Pseudomonas mallei, Pseudomonas pseudomallei, Pseudo- ovorans) are located at a distance from the BCC and monas solanacearum, and Pseudomonas picketti)[55, 161]. pseudomallei group species [133, 145, 151]. These internal In the early 1980s, strains of B. cepacia were being divisions appear to reflect interactions with their respective increasingly recovered from cultures of respiratory tract hosts, as most species included in the BCC have shown specimens from cystic fibrosis patients [69]. Further studies pathogenic interactions with their hosts, while most species revealed that while some patients might remain infected from the “plant-associated nitrogen-fixing” clade are with B. cepacia for prolonged periods without obvious reported to be beneficial to theirs [19]. symptoms, others would succumb to a rapidly progressive The non-pathogenic plant-associated species could, necrotizing pneumonia and sepsis, which was denominated therefore, constitute a single clade which contains closely cepacia syndrome (CS). Polyphasic taxonomy studies related species. Burkholderia from this group are mostly revealed that B. cepacia was actually made up of five associated beneficially with plants, although some species closely related but distinct genomic species referred to as the may also survive in sediments and bulk soil [81]. Burkholderia cepacia complex (BCC). Each species was Remarkably, several species from this group can convert initially designated as a genomovar, but they later acquired atmospheric nitrogen to ammonia via biological nitrogen binomial species names [148]. Currently, the BCC complex fixation (BNF) [50, 90]. In addition, most of them are is comprised of 17 species that share 98–100% similarity in catabolically versatile enabling them to degrade recalcitrant their 16S rRNA, and 94–95% in their recA gene sequences compounds, and thus to survive in environments with [151, 152]. Owing to their clinical importance, the BCC limited nutrient availability. Some species are able to complex, as well as other pathogenic Burkholderia spp., promote plant growth, while others are proposed for such as B. mallei and B. pseudomallei, have been the subject biotechnological uses, such as phytoremediation and of numerous reviews [35, 54, 79, 85, 86]. biocontrol. This group will henceforth be referred to as Burkholderia species had thus gained considerable the “plant-beneficial-environmental (PBE) Burkholderia importance owing to their pathogenicity, but two findings cluster”, and their features will be reviewed here with a had a strong impact on their ecological perception: (1) the special emphasis on plant–bacterial interactions. The main identification of nitrogen fixation in Burkholderia species characteristics of this group of species are summarized in other than Burkholderia vietnamiensis (which belongs to Table 1. the BCC), such as “ Burkholderia brasilensis” M130 [9] and Burkholderia kururiensis [50, 162]; and (2) the description of legume-nodulating Burkholderia [98] and Figure 1 Updated phylogenetic tree based on 16S rRNA sequencesb of the recognized species of the Burkholderia genus. Sequences from their subsequent characterization as genuine endosymbionts type strains were aligned and the sequence of Pandoraea norimber- [98]. These two discoveries, together with the increased gensis LMG 13019 was used as an outgroup (bar=0·005 nucleotide exploration of plant growth-promoting rhizobacteria substitutions per nucleotide position). The evolutionary distances were (PGPR), led to the characterization of a considerable computed using the maximum likelihood method and the evolutionary history was inferred using the neighbor-joining method. Numbers at number of Burkholderia species, both from the rhizosphere branch nodes are bootstrap values. Red—the pathogenic Burkholderia and/or the plant interior, many of them diazotrophs and /or clade; green—plant-associated beneficial and environmental (PBE) legume nodulators [19]. group Beneficial Burkholderia 251 252 Table 1 Main characteristics of the plant-associated beneficial and environmental (PBE) Burkholderia group Species Isolated from Host Relevant
Load more

Recommended publications
  • The Role of Earthworm Gut-Associated Microorganisms in the Fate of Prions in Soil
    THE ROLE OF EARTHWORM GUT-ASSOCIATED MICROORGANISMS IN THE FATE OF PRIONS IN SOIL Von der Fakultät für Lebenswissenschaften der Technischen Universität Carolo-Wilhelmina zu Braunschweig zur Erlangung des Grades eines Doktors der Naturwissenschaften (Dr. rer. nat.) genehmigte D i s s e r t a t i o n von Taras Jur’evič Nechitaylo aus Krasnodar, Russland 2 Acknowledgement I would like to thank Prof. Dr. Kenneth N. Timmis for his guidance in the work and help. I thank Peter N. Golyshin for patience and strong support on this way. Many thanks to my other colleagues, which also taught me and made the life in the lab and studies easy: Manuel Ferrer, Alex Neef, Angelika Arnscheidt, Olga Golyshina, Tanja Chernikova, Christoph Gertler, Agnes Waliczek, Britta Scheithauer, Julia Sabirova, Oleg Kotsurbenko, and other wonderful labmates. I am also grateful to Michail Yakimov and Vitor Martins dos Santos for useful discussions and suggestions. I am very obliged to my family: my parents and my brother, my parents on low and of course to my wife, which made all of their best to support me. 3 Summary.....................................................………………………………………………... 5 1. Introduction...........................................................................................................……... 7 Prion diseases: early hypotheses...………...………………..........…......…......……….. 7 The basics of the prion concept………………………………………………….……... 8 Putative prion dissemination pathways………………………………………….……... 10 Earthworms: a putative factor of the dissemination of TSE infectivity in soil?.………. 11 Objectives of the study…………………………………………………………………. 16 2. Materials and Methods.............................…......................................................……….. 17 2.1 Sampling and general experimental design..................................................………. 17 2.2 Fluorescence in situ Hybridization (FISH)………..……………………….………. 18 2.2.1 FISH with soil, intestine, and casts samples…………………………….……... 18 Isolation of cells from environmental samples…………………………….……….
    [Show full text]
  • USDA/APHIS Environmental Assessment
    Finding of No Significant Impact and Decision Notice Animal and Plant Health Inspection Service Issuance of Permit to Release Genetically-Engineered Burkholderia glumae The Animal and Plant Health Inspection Service (APHIS) of the United States Department of Agriculture (USDA) has received a permit application (APHIS number 06-111-01r) from Dr. Martin Rush at the Louisiana State University to conduct a field trial using strains of the bacterium Burkholderia glumae. Permit application 06-111-01r describes four Burkholderia glumae strains: Two wild-type strains endemic to the United States, one of which causes panicle blight on rice and the other naturally non-pathogenic, and two genetically engineered, non-pathogenic strains that share the same avirulent phenotype. A description of the field tests may be found in the attached Environmental Assessment (EA), which was prepared pursuant to APHIS regulations (7 CFR part 372) promulgated under the National Environmental Policy Act. The field tests are scheduled to begin in August 2007 in East Baton Rouge Parish, Louisiana. An EA was prepared and submitted for public comment for 30 days. One comment that raised 5 issues was received and the issues are addressed in an attachment to this document. APHIS proposed three different actions to take in response to the permit application: • the denial of the permit (Alternative A) • the granting of the permit with no Supplemental Permit Conditions (Alternative B) • the granting of the permit with Supplemental Permit Conditions containing duplicative safety measures and reporting requirements (Alternative C) APHIS chose Alternative C as its Preferred Alternative. Based upon analysis described in the EA, APHIS has determined that the action proposed in Alternative C will not have a significant impact on the quality of the human environment because: 1.
    [Show full text]
  • Inactivation of CRISPR-Cas Systems by Anti-CRISPR Proteins in Diverse Bacterial Species April Pawluk1, Raymond H.J
    LETTERS PUBLISHED: 13 JUNE 2016 | ARTICLE NUMBER: 16085 | DOI: 10.1038/NMICROBIOL.2016.85 Inactivation of CRISPR-Cas systems by anti-CRISPR proteins in diverse bacterial species April Pawluk1, Raymond H.J. Staals2, Corinda Taylor2, Bridget N.J. Watson2, Senjuti Saha3, Peter C. Fineran2, Karen L. Maxwell4* and Alan R. Davidson1,3* CRISPR-Cas systems provide sequence-specific adaptive immu- MGE-encoded mechanisms that inhibit CRISPR-Cas systems. In nity against foreign nucleic acids1,2. They are present in approxi- support of this hypothesis, phages infecting Pseudomonas aeruginosa mately half of all sequenced prokaryotes3 and are expected to were found to encode diverse families of proteins that inhibit constitute a major barrier to horizontal gene transfer. We pre- the CRISPR-Cas systems of their host through several distinct viously described nine distinct families of proteins encoded in mechanisms4,5,17,18. However, homologues of these anti-CRISPR Pseudomonas phage genomes that inhibit CRISPR-Cas function4,5. proteins were found only within the Pseudomonas genus. Here, We have developed a bioinformatic approach that enabled us to we describe a bioinformatic approach that allowed us to identify discover additional anti-CRISPR proteins encoded in phages five novel families of functional anti-CRISPR proteins encoded in and other mobile genetic elements of diverse bacterial phages and other putative MGEs in species spanning the diversity species. We show that five previously undiscovered families of Proteobacteria. of anti-CRISPRs inhibit the type I-F CRISPR-Cas systems of The nine previously characterized anti-CRISPR protein families both Pseudomonas aeruginosa and Pectobacterium atrosepticum, possess no common sequence motifs, so we used genomic context to and a dual specificity anti-CRISPR inactivates both type I-F search for novel anti-CRISPR genes.
    [Show full text]
  • (Batch Learning Self-Organizing Maps), to the Microbiome Analysis of Ticks
    Title A novel approach, based on BLSOMs (Batch Learning Self-Organizing Maps), to the microbiome analysis of ticks Nakao, Ryo; Abe, Takashi; Nijhof, Ard M; Yamamoto, Seigo; Jongejan, Frans; Ikemura, Toshimichi; Sugimoto, Author(s) Chihiro The ISME Journal, 7(5), 1003-1015 Citation https://doi.org/10.1038/ismej.2012.171 Issue Date 2013-03 Doc URL http://hdl.handle.net/2115/53167 Type article (author version) File Information ISME_Nakao.pdf Instructions for use Hokkaido University Collection of Scholarly and Academic Papers : HUSCAP A novel approach, based on BLSOMs (Batch Learning Self-Organizing Maps), to the microbiome analysis of ticks Ryo Nakao1,a, Takashi Abe2,3,a, Ard M. Nijhof4, Seigo Yamamoto5, Frans Jongejan6,7, Toshimichi Ikemura2, Chihiro Sugimoto1 1Division of Collaboration and Education, Research Center for Zoonosis Control, Hokkaido University, Kita-20, Nishi-10, Kita-ku, Sapporo, Hokkaido 001-0020, Japan 2Nagahama Institute of Bio-Science and Technology, Nagahama, Shiga 526-0829, Japan 3Graduate School of Science & Technology, Niigata University, 8050, Igarashi 2-no-cho, Nishi- ku, Niigata 950-2181, Japan 4Institute for Parasitology and Tropical Veterinary Medicine, Freie Universität Berlin, Königsweg 67, 14163 Berlin, Germany 5Miyazaki Prefectural Institute for Public Health and Environment, 2-3-2 Gakuen Kibanadai Nishi, Miyazaki 889-2155, Japan 6Utrecht Centre for Tick-borne Diseases (UCTD), Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3584 CL Utrecht, The Netherlands 7Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, 0110 Onderstepoort, South Africa aThese authors contributed equally to this work. Keywords: BLSOMs/emerging diseases/metagenomics/microbiomes/symbionts/ticks Running title: Tick microbiomes revealed by BLSOMs Subject category: Microbe-microbe and microbe-host interactions Abstract Ticks transmit a variety of viral, bacterial and protozoal pathogens, which are often zoonotic.
    [Show full text]
  • Potential of Bacterial Cellulose Chemisorbed with Anti-Metabolites, 3-Bromopyruvate Or Sertraline, to Fight Against Helicobacter Pylori Lawn Biofilm
    International Journal of Molecular Sciences Article Potential of Bacterial Cellulose Chemisorbed with Anti-Metabolites, 3-Bromopyruvate or Sertraline, to Fight against Helicobacter pylori Lawn Biofilm Paweł Krzy˙zek 1,* , Gra˙zynaGo´sciniak 1 , Karol Fijałkowski 2 , Paweł Migdał 3 , Mariusz Dziadas 4 , Artur Owczarek 5 , Joanna Czajkowska 6, Olga Aniołek 7 and Adam Junka 8 1 Department of Microbiology, Faculty of Medicine, Wroclaw Medical University, 50-368 Wroclaw, Poland; [email protected] 2 Department of Immunology, Microbiology and Physiological Chemistry, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, 70-311 Szczecin, Poland; karol.fi[email protected] 3 Department of Environment, Hygiene and Animal Welfare, Wroclaw University of Environmental and Life Sciences, 51-630 Wroclaw, Poland; [email protected] 4 Faculty of Chemistry, University of Wroclaw, 50-353 Wroclaw, Poland; [email protected] 5 Department of Drug Form Technology, Wroclaw Medical University, 50-556 Wroclaw, Poland; [email protected] 6 Laboratory of Microbiology, Polish Center for Technology Development PORT, 54-066 Wroclaw, Poland; [email protected] 7 Faculty of Medicine, Lazarski University, 02-662 Warsaw, Poland; [email protected] 8 Department of Pharmaceutical Microbiology and Parasitology, Wroclaw Medical University, 50-556 Wroclaw, Poland; [email protected] * Correspondence: [email protected] Received: 23 November 2020; Accepted: 11 December 2020; Published: 14 December 2020 Abstract: Helicobacter pylori is a bacterium known mainly of its ability to cause persistent inflammations of the human stomach, resulting in peptic ulcer diseases and gastric cancers. Continuous exposure of this bacterium to antibiotics has resulted in high detection of multidrug-resistant strains and difficulties in obtaining a therapeutic effect.
    [Show full text]
  • Table S4. Phylogenetic Distribution of Bacterial and Archaea Genomes in Groups A, B, C, D, and X
    Table S4. Phylogenetic distribution of bacterial and archaea genomes in groups A, B, C, D, and X. Group A a: Total number of genomes in the taxon b: Number of group A genomes in the taxon c: Percentage of group A genomes in the taxon a b c cellular organisms 5007 2974 59.4 |__ Bacteria 4769 2935 61.5 | |__ Proteobacteria 1854 1570 84.7 | | |__ Gammaproteobacteria 711 631 88.7 | | | |__ Enterobacterales 112 97 86.6 | | | | |__ Enterobacteriaceae 41 32 78.0 | | | | | |__ unclassified Enterobacteriaceae 13 7 53.8 | | | | |__ Erwiniaceae 30 28 93.3 | | | | | |__ Erwinia 10 10 100.0 | | | | | |__ Buchnera 8 8 100.0 | | | | | | |__ Buchnera aphidicola 8 8 100.0 | | | | | |__ Pantoea 8 8 100.0 | | | | |__ Yersiniaceae 14 14 100.0 | | | | | |__ Serratia 8 8 100.0 | | | | |__ Morganellaceae 13 10 76.9 | | | | |__ Pectobacteriaceae 8 8 100.0 | | | |__ Alteromonadales 94 94 100.0 | | | | |__ Alteromonadaceae 34 34 100.0 | | | | | |__ Marinobacter 12 12 100.0 | | | | |__ Shewanellaceae 17 17 100.0 | | | | | |__ Shewanella 17 17 100.0 | | | | |__ Pseudoalteromonadaceae 16 16 100.0 | | | | | |__ Pseudoalteromonas 15 15 100.0 | | | | |__ Idiomarinaceae 9 9 100.0 | | | | | |__ Idiomarina 9 9 100.0 | | | | |__ Colwelliaceae 6 6 100.0 | | | |__ Pseudomonadales 81 81 100.0 | | | | |__ Moraxellaceae 41 41 100.0 | | | | | |__ Acinetobacter 25 25 100.0 | | | | | |__ Psychrobacter 8 8 100.0 | | | | | |__ Moraxella 6 6 100.0 | | | | |__ Pseudomonadaceae 40 40 100.0 | | | | | |__ Pseudomonas 38 38 100.0 | | | |__ Oceanospirillales 73 72 98.6 | | | | |__ Oceanospirillaceae
    [Show full text]
  • Yu-Chen Ling and John W. Moreau
    Microbial Distribution and Activity in a Coastal Acid Sulfate Soil System Introduction: Bioremediation in Yu-Chen Ling and John W. Moreau coastal acid sulfate soil systems Method A Coastal acid sulfate soil (CASS) systems were School of Earth Sciences, University of Melbourne, Melbourne, VIC 3010, Australia formed when people drained the coastal area Microbial distribution controlled by environmental parameters Microbial activity showed two patterns exposing the soil to the air. Drainage makes iron Microbial structures can be grouped into three zones based on the highest similarity between samples (Fig. 4). Abundant populations, such as Deltaproteobacteria, kept constant activity across tidal cycling, whereas rare sulfides oxidize and release acidity to the These three zones were consistent with their geological background (Fig. 5). Zone 1: Organic horizon, had the populations changed activity response to environmental variations. Activity = cDNA/DNA environment, low pH pore water further dissolved lowest pH value. Zone 2: surface tidal zone, was influenced the most by tidal activity. Zone 3: Sulfuric zone, Abundant populations: the heavy metals. The acidity and toxic metals then Method A Deltaproteobacteria Deltaproteobacteria this area got neutralized the most. contaminate coastal and nearby ecosystems and Method B 1.5 cause environmental problems, such as fish kills, 1.5 decreased rice yields, release of greenhouse gases, Chloroflexi and construction damage. In Australia, there is Gammaproteobacteria Gammaproteobacteria about a $10 billion “legacy” from acid sulfate soils, Chloroflexi even though Australia is only occupied by around 1.0 1.0 Cyanobacteria,@ Acidobacteria Acidobacteria Alphaproteobacteria 18% of the global acid sulfate soils. Chloroplast Zetaproteobacteria Rare populations: Alphaproteobacteria Method A log(RNA(%)+1) Zetaproteobacteria log(RNA(%)+1) Method C Method B 0.5 0.5 Cyanobacteria,@ Bacteroidetes Chloroplast Firmicutes Firmicutes Bacteroidetes Planctomycetes Planctomycetes Ac8nobacteria Fig.
    [Show full text]
  • Iron Transport Strategies of the Genus Burkholderia
    Zurich Open Repository and Archive University of Zurich Main Library Strickhofstrasse 39 CH-8057 Zurich www.zora.uzh.ch Year: 2015 Iron transport strategies of the genus Burkholderia Mathew, Anugraha Posted at the Zurich Open Repository and Archive, University of Zurich ZORA URL: https://doi.org/10.5167/uzh-113412 Dissertation Published Version Originally published at: Mathew, Anugraha. Iron transport strategies of the genus Burkholderia. 2015, University of Zurich, Faculty of Science. Iron transport strategies of the genus Burkholderia Dissertation zur Erlangung der naturwissenschaftlichen Doktorwürde (Dr. sc. nat.) vorgelegt der Mathematisch-naturwissenschaftlichen Fakultät der Universität Zürich von Anugraha Mathew aus Indien Promotionskomitee Prof. Dr. Leo Eberl (Vorsitz) Prof. Dr. Jakob Pernthaler Dr. Aurelien carlier Zürich, 2015 2 Table of Contents Summary .............................................................................................................. 7 Zusammenfassung ................................................................................................ 9 Abbreviations ..................................................................................................... 11 Chapter 1: Introduction ....................................................................................... 14 1.1.Role and properties of iron in bacteria ...................................................................... 14 1.2.Iron transport mechanisms in bacteria .....................................................................
    [Show full text]
  • Microbial Ecology of Denitrification in Biological Wastewater Treatment
    water research 64 (2014) 237e254 Available online at www.sciencedirect.com ScienceDirect journal homepage: www.elsevier.com/locate/watres Review Microbial ecology of denitrification in biological wastewater treatment * ** Huijie Lu a, , Kartik Chandran b, , David Stensel c a Department of Civil and Environmental Engineering, University of Illinois at Urbana Champaign, 205 N Mathews, Urbana, IL 61801, USA b Department of Earth and Environmental Engineering, Columbia University, 500 West 120th Street, New York, NY 10027, USA c Department of Civil and Environmental Engineering, University of Washington, Seattle, WA 98195, USA article info abstract Article history: Globally, denitrification is commonly employed in biological nitrogen removal processes to Received 21 December 2013 enhance water quality. However, substantial knowledge gaps remain concerning the overall Received in revised form community structure, population dynamics and metabolism of different organic carbon 26 June 2014 sources. This systematic review provides a summary of current findings pertaining to the Accepted 29 June 2014 microbial ecology of denitrification in biological wastewater treatment processes. DNA Available online 11 July 2014 fingerprinting-based analysis has revealed a high level of microbial diversity in denitrifica- tion reactors and highlighted the impacts of carbon sources in determining overall deni- Keywords: trifying community composition. Stable isotope probing, fluorescence in situ hybridization, Wastewater denitrification microarrays and meta-omics further
    [Show full text]
  • University of Oklahoma Graduate College
    UNIVERSITY OF OKLAHOMA GRADUATE COLLEGE CHARACTERIZATION OF SUBSURFACE MICROBIAL COMMUNITIES INVOLVED IN BIOREMEDIATION OF URANIUM AND NITRATE A DISSERTATION SUBMITTED TO THE GRADUATE FACULTY in partial fulfillment of the requirements for the Degree of DOCTOR OF PHILOSOPHY By ANNE MARIE SPAIN Norman, Oklahoma 2009 CHARACTERIZATION OF SUBSURFACE MICROBIAL COMMUNITIES INVOLVED IN BIOREMEDIATION OF URANIUM AND NITRATE A DISSERTATION APPROVED FOR THE DEPARTMENT OF BOTANY AND MICROBIOLOGY BY __________________________ Dr. Lee R. Krumholz, Chair __________________________ Dr. Joseph M. Suflita __________________________ Dr. Michael J. McInerney __________________________ Dr. Ralph S. Tanner __________________________ Dr. Elizabeth C. Butler Copyright by ANNE SPAIN 2009 All Rights Reserved. I dedicate this to my mom, Kristan Spain Acknowledgements The work presented in this dissertation thesis has been aided by the efforts of several people. First, I would like to thank each of my committee members, each of whom I have learned much from. Dr. Joe Suflita, Dr. Michael McInerny, Dr. Ralph Tanner, and Dr. Elizabeth Butler: not only have I learned much from each of you in classes and in department seminars, but also I have also gained a lot from your students who have used what they have learned from you to help me with my research efforts in various ways. The cooperation and fellowship among faculty and graduate students at the University of Oklahoma has been of extreme value to me, and is one of the things that drew me here for my graduate studies. And so again, I thank each of you for your positive attitudes, and your genuine willingness to help me as well as all graduate students here at OU.
    [Show full text]
  • Bisheriger Stand Des Wissens
    Genetische und biochemische Charakterisierung von Enzymen des anaeroben Monoterpen-Abbaus in Castellaniella defragrans Dissertation zur Erlangung des Grades eines Doktors der Naturwissenschaften ― Dr. rer. nat. ― Dem Fachbereich Biologie/Chemie der Universität Bremen vorgelegt von Frauke Lüddeke Bremen, November 2011 Diese Arbeit wurde von Oktober 2008 bis November 2011 am Max-Planck-Institut für Marine Mikrobiologie in Bremen angefertigt. Teile dieser Arbeit sind bereits veröffentlicht oder zur Veröffentlichung eingereicht. Erster Gutachter: Prof. Dr. Friedrich Widdel Zweiter Gutachter: PD Dr. Jens Harder Tag des Promotionskolloquiums: 14.12.2011 Zusammenfassung III Zusammenfassung Das Betaproteobakterium Castellaniella (ex Alcaligenes) defragrans metabolisiert anaerob Monoterpene zu CO2 unter denitrifizierenden Bedingungen. Im Abbau involviert und initial charakterisiert sind eine Linalool Dehydratase-Isomerase (ldi/LDI) und eine Geraniol-Dehydrogenase (geoA/GeDH), während für eine Geranial-Dehydrogenase (geoB/GaDH) ein Kandidatengen gefunden wurde. In dieser Arbeit wurde ein genetisches System für C. defragrans basierend auf dem Suizid- Vektor pK19mobsacB entwickelt und Deletionsmutanten generiert. Die physiologische Charakterisierung bestätigte den postulierten Abbauweg für β-Myrcen in vivo und deckte die Existenz eines bislang unbekannten Monoterpen-Stoffwechselwegs sowie neue Enzymaktivitäten auf. Neben den genetischen Studien wurde die biochemische Charakterisierung der Enzymaktivitäten nach heterologer Überexpression in E. coli
    [Show full text]
  • Broad-Spectrum Antimicrobial Activity by Burkholderia Cenocepacia Tatl-371, a Strain Isolated from the Tomato Rhizosphere
    RESEARCH ARTICLE Rojas-Rojas et al., Microbiology DOI 10.1099/mic.0.000675 Broad-spectrum antimicrobial activity by Burkholderia cenocepacia TAtl-371, a strain isolated from the tomato rhizosphere Fernando Uriel Rojas-Rojas,1 Anuar Salazar-Gómez,1 María Elena Vargas-Díaz,1 María Soledad Vasquez-Murrieta, 1 Ann M. Hirsch,2,3 Rene De Mot,4 Maarten G. K. Ghequire,4 J. Antonio Ibarra1,* and Paulina Estrada-de los Santos1,* Abstract The Burkholderia cepacia complex (Bcc) comprises a group of 24 species, many of which are opportunistic pathogens of immunocompromised patients and also are widely distributed in agricultural soils. Several Bcc strains synthesize strain- specific antagonistic compounds. In this study, the broad killing activity of B. cenocepacia TAtl-371, a Bcc strain isolated from the tomato rhizosphere, was characterized. This strain exhibits a remarkable antagonism against bacteria, yeast and fungi including other Bcc strains, multidrug-resistant human pathogens and plant pathogens. Genome analysis of strain TAtl-371 revealed several genes involved in the production of antagonistic compounds: siderophores, bacteriocins and hydrolytic enzymes. In pursuit of these activities, we observed growth inhibition of Candida glabrata and Paraburkholderia phenazinium that was dependent on the iron concentration in the medium, suggesting the involvement of siderophores. This strain also produces a previously described lectin-like bacteriocin (LlpA88) and here this was shown to inhibit only Bcc strains but no other bacteria. Moreover, a compound with an m/z 391.2845 with antagonistic activity against Tatumella terrea SHS 2008T was isolated from the TAtl-371 culture supernatant. This strain also contains a phage-tail-like bacteriocin (tailocin) and two chitinases, but the activity of these compounds was not detected.
    [Show full text]