Mai Muun Muntant Un an to the Man Uniti
Total Page:16
File Type:pdf, Size:1020Kb

Load more
Recommended publications
-
Actinobacterial Diversity of the Ethiopian Rift Valley Lakes
ACTINOBACTERIAL DIVERSITY OF THE ETHIOPIAN RIFT VALLEY LAKES By Gerda Du Plessis Submitted in partial fulfillment of the requirements for the degree of Magister Scientiae (M.Sc.) in the Department of Biotechnology, University of the Western Cape Supervisor: Prof. D.A. Cowan Co-Supervisor: Dr. I.M. Tuffin November 2011 DECLARATION I declare that „The Actinobacterial diversity of the Ethiopian Rift Valley Lakes is my own work, that it has not been submitted for any degree or examination in any other university, and that all the sources I have used or quoted have been indicated and acknowledged by complete references. ------------------------------------------------- Gerda Du Plessis ii ABSTRACT The class Actinobacteria consists of a heterogeneous group of filamentous, Gram-positive bacteria that colonise most terrestrial and aquatic environments. The industrial and biotechnological importance of the secondary metabolites produced by members of this class has propelled it into the forefront of metagenomic studies. The Ethiopian Rift Valley lakes are characterized by several physical extremes, making it a polyextremophilic environment and a possible untapped source of novel actinobacterial species. The aims of the current study were to identify and compare the eubacterial diversity between three geographically divided soda lakes within the ERV focusing on the actinobacterial subpopulation. This was done by means of a culture-dependent (classical culturing) and culture-independent (DGGE and ARDRA) approach. The results indicate that the eubacterial 16S rRNA gene libraries were similar in composition with a predominance of α-Proteobacteria and Firmicutes in all three lakes. Conversely, the actinobacterial 16S rRNA gene libraries were significantly different and could be used to distinguish between sites. -
Dysbiosis of Small Intestinal Microbiota in Liver Cirrhosis and Its
www.nature.com/scientificreports OPEN Dysbiosis of small intestinal microbiota in liver cirrhosis and its association with etiology Received: 31 May 2016 Yanfei Chen1, Feng Ji2, Jing Guo1, Ding Shi1, Daiqiong Fang1 & Lanjuan Li1 Accepted: 22 August 2016 Cirrhosis-associated duodenal dysbiosis is not yet clearly defined. In this research, duodenal Published: 30 September 2016 mucosal microbiota was analyzed in 30 cirrhotic patients and 28 healthy controls using 16S rRNA gene pyrosequencing methods. The principal coordinate analysis revealed that cirrhotic patients were colonized by remarkable different duodenal mucosal microbiota in comparison with controls. At the genus level, Veillonella, Megasphaera, Dialister, Atopobium, and Prevotella were found overrepresented in cirrhotic duodenum. And the duodenal microbiota of healthy controls was enriched with Neisseria, Haemophilus, and SR1 genera incertae sedis. On the other hand, based on predicted metagenomes analyzed, gene pathways related to nutrient absorption (e.g. sugar and amino acid metabolism) were highly abundant in cirrhosis duodenal microbiota, and functional modules involved in bacterial proliferation and colonization (e.g. bacterial motility proteins and secretion system) were overrepresented in controls. When considering the etiology of cirrhosis, two operational taxonomic units (OTUs), OTU-23 (Neisseria) and OTU-36 (Gemella), were found discriminative between hepatitis- B-virus related cirrhosis and primary biliary cirrhosis. The results suggest that the structure of duodenal mucosa microbiota in cirrhotic patients is dramatically different from healthy controls. The duodenum dysbiosis might be related to alterations of oral microbiota and changes in duodenal micro- environment. Gut microbiota and bacterial translocation (BT) play an important role in the pathogenesis of complications of cirrhosis1. -
Food Waste Composting and Microbial Community Structure Profiling
processes Review Food Waste Composting and Microbial Community Structure Profiling Kishneth Palaniveloo 1,* , Muhammad Azri Amran 1, Nur Azeyanti Norhashim 1 , Nuradilla Mohamad-Fauzi 1,2, Fang Peng-Hui 3, Low Hui-Wen 3, Yap Kai-Lin 3, Looi Jiale 3, Melissa Goh Chian-Yee 3, Lai Jing-Yi 3, Baskaran Gunasekaran 3,* and Shariza Abdul Razak 4,* 1 Institute of Ocean and Earth Sciences, Institute for Advanced Studies Building, University of Malaya, Wilayah Persekutuan Kuala Lumpur 50603, Malaysia; [email protected] (M.A.A.); [email protected] (N.A.N.) 2 Institute of Biological Sciences, Faculty of Science, University of Malaya, Wilayah Persekutuan Kuala Lumpur 50603, Malaysia; [email protected] 3 Faculty of Applied Science, UCSI University (South Wing), Cheras, Wilayah Persekutuan Kuala Lumpur 56000, Malaysia; [email protected] (F.P.-H.); [email protected] (L.H.-W.); [email protected] (Y.K.-L.); [email protected] (L.J.); [email protected] (M.G.C.-Y.); [email protected] (L.J.-Y.) 4 Nutrition and Dietetics Program, School of Health Sciences, Health Campus, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia * Correspondence: [email protected] (K.P.); [email protected] (B.G.); [email protected] (S.A.R.); Tel.: +60-3-7967-4640 (K.P.); +60-16-323-4159 (B.G.); +60-19-964-4043 (S.A.R.) Received: 20 May 2020; Accepted: 16 June 2020; Published: 22 June 2020 Abstract: Over the last decade, food waste has been one of the major issues globally as it brings a negative impact on the environment and health. -
Bacterial Succession Within an Ephemeral Hypereutrophic Mojave Desert Playa Lake
Microb Ecol (2009) 57:307–320 DOI 10.1007/s00248-008-9426-3 MICROBIOLOGY OF AQUATIC SYSTEMS Bacterial Succession within an Ephemeral Hypereutrophic Mojave Desert Playa Lake Jason B. Navarro & Duane P. Moser & Andrea Flores & Christian Ross & Michael R. Rosen & Hailiang Dong & Gengxin Zhang & Brian P. Hedlund Received: 4 February 2008 /Accepted: 3 July 2008 /Published online: 30 August 2008 # Springer Science + Business Media, LLC 2008 Abstract Ephemerally wet playas are conspicuous features RNA gene sequencing of bacterial isolates and uncultivated of arid landscapes worldwide; however, they have not been clones. Isolates from the early-phase flooded playa were well studied as habitats for microorganisms. We tracked the primarily Actinobacteria, Firmicutes, and Bacteroidetes, yet geochemistry and microbial community in Silver Lake clone libraries were dominated by Betaproteobacteria and yet playa, California, over one flooding/desiccation cycle uncultivated Actinobacteria. Isolates from the late-flooded following the unusually wet winter of 2004–2005. Over phase ecosystem were predominantly Proteobacteria, partic- the course of the study, total dissolved solids increased by ularly alkalitolerant isolates of Rhodobaca, Porphyrobacter, ∽10-fold and pH increased by nearly one unit. As the lake Hydrogenophaga, Alishwenella, and relatives of Thauera; contracted and temperatures increased over the summer, a however, clone libraries were composed almost entirely of moderately dense planktonic population of ∽1×106 cells ml−1 Synechococcus (Cyanobacteria). A sample taken after the of culturable heterotrophs was replaced by a dense popula- playa surface was completely desiccated contained diverse tion of more than 1×109 cells ml−1, which appears to be the culturable Actinobacteria typically isolated from soils. -
Microbial Diversity of Soda Lake Habitats
Microbial Diversity of Soda Lake Habitats Von der Gemeinsamen Naturwissenschaftlichen Fakultät 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 Susanne Baumgarte aus Fritzlar 1. Referent: Prof. Dr. K. N. Timmis 2. Referent: Prof. Dr. E. Stackebrandt eingereicht am: 26.08.2002 mündliche Prüfung (Disputation) am: 10.01.2003 2003 Vorveröffentlichungen der Dissertation Teilergebnisse aus dieser Arbeit wurden mit Genehmigung der Gemeinsamen Naturwissenschaftlichen Fakultät, vertreten durch den Mentor der Arbeit, in folgenden Beiträgen vorab veröffentlicht: Publikationen Baumgarte, S., Moore, E. R. & Tindall, B. J. (2001). Re-examining the 16S rDNA sequence of Halomonas salina. International Journal of Systematic and Evolutionary Microbiology 51: 51-53. Tagungsbeiträge Baumgarte, S., Mau, M., Bennasar, A., Moore, E. R., Tindall, B. J. & Timmis, K. N. (1999). Archaeal diversity in soda lake habitats. (Vortrag). Jahrestagung der VAAM, Göttingen. Baumgarte, S., Tindall, B. J., Mau, M., Bennasar, A., Timmis, K. N. & Moore, E. R. (1998). Bacterial and archaeal diversity in an African soda lake. (Poster). Körber Symposium on Molecular and Microsensor Studies of Microbial Communities, Bremen. II Contents 1. Introduction............................................................................................................... 1 1.1. The soda lake environment ................................................................................. -
WO 2016/086210 Al 2 June 2016 (02.06.2016) P O P C T
(12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (10) International Publication Number (43) International Publication Date WO 2016/086210 Al 2 June 2016 (02.06.2016) P O P C T (51) International Patent Classification: (74) Agents: MELLO, Jill, Ann et al; McCarter & English, A61P 1/00 (2006.01) A61P 37/00 (2006.01) LLP, 265 Franklin Street, Boston, MA 021 10 (US). A61P 29/00 (2006.01) A61K 35/74 (2015.01) (81) Designated States (unless otherwise indicated, for every (21) International Application Number: kind of national protection available): AE, AG, AL, AM, PCT/US20 15/0628 10 AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, (22) International Filing Date: DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, 25 November 2015 (25.1 1.2015) HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, (25) Filing Language: English KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, (26) Publication Language: English PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, (30) Priority Data: SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, 62/084,537 25 November 2014 (25. 11.2014) US TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. 62/084,536 25 November 2014 (25. -
Manganese-II Oxidation and Copper-II Resistance in Endospore Forming Firmicutes Isolated from Uncontaminated Environmental Sites
AIMS Environmental Science, 3(2): 220-238. DOI: 10.3934/environsci.2016.2.220 Received 21 January 2016, Accepted 05 April 2016, Published 12 April 2016 http://www.aimspress.com/journal/environmental Research article Manganese-II oxidation and Copper-II resistance in endospore forming Firmicutes isolated from uncontaminated environmental sites Ganesan Sathiyanarayanan 1,†, Sevasti Filippidou 1,†, Thomas Junier 1,2, Patricio Muñoz Rufatt 1, Nicole Jeanneret 1, Tina Wunderlin 1, Nathalie Sieber 1, Cristina Dorador 3 and Pilar Junier 1,* 1 Laboratory of Microbiology, Institute of Biology, University of Neuchâtel, Emile-Argand 11, CH-2000 Neuchâtel, Switzerland 2 Vital-IT group, Swiss Institute of Bioinformatics, CH-1000 Lausanne, Switzerland 3 Laboratorio de Complejidad Microbiana y Ecología Funcional; Departamento de Biotecnología; Facultad de Ciencias del Mar y Recursos Biológicos, Universidad de Antofagasta; CL-, 1270190, Antofagasta, Chile * Correspondence: Email: [email protected]; Tel: +41-32-718-2244; Fax: +41-32-718-3001. † These authors contributed equally to this work. Abstract: The accumulation of metals in natural environments is a growing concern of modern societies since they constitute persistent, non-degradable contaminants. Microorganisms are involved in redox processes and participate to the biogeochemical cycling of metals. Some endospore-forming Firmicutes (EFF) are known to oxidize and reduce specific metals and have been isolated from metal-contaminated sites. However, whether EFF isolated from uncontaminated sites have the same capabilities has not been thoroughly studied. In this study, we measured manganese oxidation and copper resistance of aerobic EFF from uncontaminated sites. For the purposes of this study we have sampled 22 natural habitats and isolated 109 EFF strains. -
Production of 2-Phenylethylamine by Decarboxylation of L-Phenylalanine in Alkaliphilic Bacillus Cohnii
J. Gen. Appl. Microbiol., 45, 149–153 (1999) Production of 2-phenylethylamine by decarboxylation of L-phenylalanine in alkaliphilic Bacillus cohnii Koei Hamana* and Masaru Niitsu1 School of Health Sciences, Faculty of Medicine, Gunma University, Maebashi 371–8514, Japan 1Faculty of Pharmaceutical Sciences, Josai University, Sakado 350–0290, Japan (Received February 22, 1999; Accepted August 16, 1999) Cellular polyamine fraction of alkaliphilic Bacillus species was analyzed by HPLC. 2-Phenylethyl- amine was found selectively and ubiquitously in the five strains belonging to Bacillus cohnii within 27 alkaliphilic Bacillus strains. A large amount of this aromatic amine was produced by the decar- boxylation of L-phenylalanine in the bacteria and secreted into the culture medium. The production of 2-phenylethylamine may serve for the chemotaxonomy of alkaliphilic Bacillus. Key Words——alkaliphilic Bacillus; phenylethylamine; polyamine In the course of our study on polyamine distribution sequence data of bacilli belonging to the genera Bacil- profiles as a chemotaxonomic marker, we have shown lus, Sporolactobacillus, and Amphibacillus, including that diamines such as diaminopropane, putrescine, various neutrophilic, alkaliphilic, and acidophilic and cadaverine, and a guanidinoamine, agmatine, species (Nielsen et al., 1994, 1995; Yumoto et al., sporadically spread within gram-positive bacilli (Hama- 1998). Therefore alkaliphilic members of Bacillus are na, 1999; Hamana et al., 1989, 1993). Mesophilic phylogenetically heterogeneous. In the present study, Bacillus species, including some alkaliphilic strains, we describe the distribution of this amine and the de- and Brevibacillus, Paenibacillus, Virgibacillus, Sporo- carboxylase activity for phenylalanine to produce this lactobacillus, and halophilic Halobacillus species con- amine within newly validated alkaliphilic Bacillus tained spermidine as the major polyamine and lacked species. -
Chapter 1 Reviews Studies in Geochemistry and Microbiology of Studied Area
DIVERSITY AND POTENTIAL GEOCHEMICAL FUNCTIONS OF PROKARYOTES IN HOT SPRINGS OF THE UZON CALDERA, KAMCHATKA by WEIDONG ZHAO (Under the Direction of Chuanlun L Zhang and Christopher S Romanek) ABSTRACT Hot springs are modern analogs of ancient hydrothermal systems where life may have emerged and evolved. Autotrophic microorganisms play a key role in regulating the structure of microbial assemblage and associated biochemical processes in hot springs. This dissertation aims to elucidate the diversity, abundance and ecological functions of multiple groups of chemoautotrophs that use diverse energy sources including CO, NH3, and H2 in terrestrial hot springs of the Uzon Caldera, Kamchatka (Far East Russia). This dissertation consists of seven chapters. Chapter 1 reviews studies in geochemistry and microbiology of studied area. 13 Chapter 2 reports H2, CO2, CH4 and CO contents and the δ C values in vent gas samples. The gases were determined to be thermogenic with small temporal but large spatial variations among the springs investigated. Chemical and partial isotope equilibria between CO2 and CH4 may be attained in the subsurface at elevated temperature. Chapter 3 shows the distribution of bacteria was spatially heterogeneous whereas that of archaea was related to geographic features. Cluster analyses group bacterial and archaeal communities according to their similarities of lipid compositions. Hydrogen-utilizing Aquificales appeared to be dominant in two of the four bacterial groups, but was outnumbered by presumably Cyanobacteria-Thermotogae or Proteobacteria-Desulfurobacterium types in the other two groups. The lipid data also suggest the existence of possibly three types of archaea with each type producing one of GDGT-0, GDGT-1, and GDGT-4 as the main membrane lipids, respectively. -
Isolation and Diversity of Sediment Bacteria in The
bioRxiv preprint doi: https://doi.org/10.1101/638304; this version posted May 14, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY 4.0 International license. 1 Isolation and Diversity of Sediment Bacteria in the 2 Hypersaline Aiding Lake, China 3 4 Tong-Wei Guan, Yi-Jin Lin, Meng-Ying Ou, Ke-Bao Chen 5 6 7 Institute of Microbiology, Xihua University, Chengdu 610039, P. R. China. 8 9 Author for correspondence: 10 Tong-Wei Guan 11 Tel/Fax: +86 028 87720552 12 E-mail: [email protected] 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 bioRxiv preprint doi: https://doi.org/10.1101/638304; this version posted May 14, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY 4.0 International license. 29 Abstract A total of 343 bacteria from sediment samples of Aiding Lake, China, were isolated using 30 nine different media with 5% or 15% (w/v) NaCl. The number of species and genera of bacteria recovered 31 from the different media significantly varied, indicating the need to optimize the isolation conditions. 32 The results showed an unexpected level of bacterial diversity, with four phyla (Firmicutes, 33 Actinobacteria, Proteobacteria, and Rhodothermaeota), fourteen orders (Actinopolysporales, 34 Alteromonadales, Bacillales, Balneolales, Chromatiales, Glycomycetales, Jiangellales, Micrococcales, 35 Micromonosporales, Oceanospirillales, Pseudonocardiales, Rhizobiales, Streptomycetales, and 36 Streptosporangiales), including 17 families, 41 genera, and 71 species. -
Diversity and Biocontrol Potential of Cultivable Endophytic Bacteria Associated with Halophytes from the West Aral Sea Basin
microorganisms Article Diversity and Biocontrol Potential of Cultivable Endophytic Bacteria Associated with Halophytes from the West Aral Sea Basin Lei Gao 1,2, Jinbiao Ma 1 , Yonghong Liu 1 , Yin Huang 1, Osama Abdalla Abdelshafy Mohamad 1 , Hongchen Jiang 1,3 , Dilfuza Egamberdieva 4,5 , Wenjun Li 1,6,* and Li Li 1,* 1 State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; [email protected] (L.G.); [email protected] (J.M.); [email protected] (Y.L.); [email protected] (Y.H.); [email protected] (O.A.A.M.); [email protected] (H.J.) 2 College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China 3 State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China 4 Faculty of Biology, National University of Uzbekistan, Tashkent 100174, Uzbekistan; [email protected] 5 Leibniz Centre for Agricultural Landscape Research (ZALF), 15374 Müncheberg, Germany 6 State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, China * Correspondence: [email protected] (W.L.); [email protected] (L.L.) Abstract: Endophytes associated with halophytes may contribute to the host’s adaptation to adverse Citation: Gao, L.; Ma, J.; Liu, Y.; environmental conditions through improving their stress tolerance and protecting them from various Huang, Y.; Mohamad, O.A.A.; Jiang, soil-borne pathogens. In this study, the diversity and antifungal activity of endophytic bacteria H.; Egamberdieva, D.; Li, W.; Li, L. -
Microbial Hitchhikers on Intercontinental Dust: Catching a Lift in Chad
The ISME Journal (2013) 7, 850–867 & 2013 International Society for Microbial Ecology All rights reserved 1751-7362/13 www.nature.com/ismej ORIGINAL ARTICLE Microbial hitchhikers on intercontinental dust: catching a lift in Chad Jocelyne Favet1, Ales Lapanje2, Adriana Giongo3, Suzanne Kennedy4, Yin-Yin Aung1, Arlette Cattaneo1, Austin G Davis-Richardson3, Christopher T Brown3, Renate Kort5, Hans-Ju¨ rgen Brumsack6, Bernhard Schnetger6, Adrian Chappell7, Jaap Kroijenga8, Andreas Beck9,10, Karin Schwibbert11, Ahmed H Mohamed12, Timothy Kirchner12, Patricia Dorr de Quadros3, Eric W Triplett3, William J Broughton1,11 and Anna A Gorbushina1,11,13 1Universite´ de Gene`ve, Sciences III, Gene`ve 4, Switzerland; 2Institute of Physical Biology, Ljubljana, Slovenia; 3Department of Microbiology and Cell Science, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL, USA; 4MO BIO Laboratories Inc., Carlsbad, CA, USA; 5Elektronenmikroskopie, Carl von Ossietzky Universita¨t, Oldenburg, Germany; 6Microbiogeochemie, ICBM, Carl von Ossietzky Universita¨t, Oldenburg, Germany; 7CSIRO Land and Water, Black Mountain Laboratories, Black Mountain, ACT, Australia; 8Konvintsdyk 1, Friesland, The Netherlands; 9Botanische Staatssammlung Mu¨nchen, Department of Lichenology and Bryology, Mu¨nchen, Germany; 10GeoBio-Center, Ludwig-Maximilians Universita¨t Mu¨nchen, Mu¨nchen, Germany; 11Bundesanstalt fu¨r Materialforschung, und -pru¨fung, Abteilung Material und Umwelt, Berlin, Germany; 12Geomatics SFRC IFAS, University of Florida, Gainesville, FL, USA and 13Freie Universita¨t Berlin, Fachbereich Biologie, Chemie und Pharmazie & Geowissenschaften, Berlin, Germany Ancient mariners knew that dust whipped up from deserts by strong winds travelled long distances, including over oceans. Satellite remote sensing revealed major dust sources across the Sahara. Indeed, the Bode´le´ Depression in the Republic of Chad has been called the dustiest place on earth.