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Ameliorating Process Parameters for Zeaxanthin Yield in Arthrobacter Gandavensis MTCC 25325
Ram et al. AMB Expr (2020) 10:69 https://doi.org/10.1186/s13568-020-01008-4 ORIGINAL ARTICLE Open Access Ameliorating process parameters for zeaxanthin yield in Arthrobacter gandavensis MTCC 25325 Shristi Ram1,2, Sushma Rani Tirkey1,2, Madhava Anil Kumar1,3 and Sandhya Mishra1,2* Abstract The present study aims to escalate the production of prophylactic agent zeaxanthin using a screened potential bacterial isolate. For this purpose, a freshwater bacterium capable of producing zeaxanthin was isolated from Bor Talav, Bhavnagar. The 16S rRNA sequence confrmed the isolate as Arthrobacter gandavensis. The bacterium was also submitted to Microbial Type Culture Collection, CSIR-Institute of Microbial Technology, Chandigarh, India, with the accession number MTCC 25325. The chemo-metric tools were employed to optimise the infuencing factors such as pH, temperature, inoculum size, agitation speed, carbon source and harvest time on zeaxanthin yield. Thereafter, six parameters were narrowed down to three factors and were optimised using the central composite design (CCD) matrix. Maximum zeaxanthin (1.51 mg/g) was derived when A. gandavensis MTCC 25325 was grown under pH 6.0, 1.5% (w/v) glucose and 10% (v/v) inoculum size. A high regression coefcient (R2 0.92) of the developed model indicated the accurateness of the tested parameters. To the best of our knowledge,= this is the frst report on tailoring the process parameters using chemo-metric optimisation for escalating the zeaxanthin production by A. gandavensis MTCC 25325. Keywords: Arthrobacter gandavensis MTCC 25325, Central composite design, Nutraceutical, Zeaxanthin Key points Introduction Te pursuit of alternative sources as functional food (that • Chemo-metric approach was used for optimising serves the dual purpose of nutrition and diet) has led to zeaxanthin production. -
Kaistella Soli Sp. Nov., Isolated from Oil-Contaminated Soil
A001 Kaistella soli sp. nov., Isolated from Oil-contaminated Soil Dhiraj Kumar Chaudhary1, Ram Hari Dahal2, Dong-Uk Kim3, and Yongseok Hong1* 1Department of Environmental Engineering, Korea University Sejong Campus, 2Department of Microbiology, School of Medicine, Kyungpook National University, 3Department of Biological Science, College of Science and Engineering, Sangji University A light yellow-colored, rod-shaped bacterial strain DKR-2T was isolated from oil-contaminated experimental soil. The strain was Gram-stain-negative, catalase and oxidase positive, and grew at temperature 10–35°C, at pH 6.0– 9.0, and at 0–1.5% (w/v) NaCl concentration. The phylogenetic analysis and 16S rRNA gene sequence analysis suggested that the strain DKR-2T was affiliated to the genus Kaistella, with the closest species being Kaistella haifensis H38T (97.6% sequence similarity). The chemotaxonomic profiles revealed the presence of phosphatidylethanolamine as the principal polar lipids;iso-C15:0, antiso-C15:0, and summed feature 9 (iso-C17:1 9c and/or C16:0 10-methyl) as the main fatty acids; and menaquinone-6 as a major menaquinone. The DNA G + C content was 39.5%. In addition, the average nucleotide identity (ANIu) and in silico DNA–DNA hybridization (dDDH) relatedness values between strain DKR-2T and phylogenically closest members were below the threshold values for species delineation. The polyphasic taxonomic features illustrated in this study clearly implied that strain DKR-2T represents a novel species in the genus Kaistella, for which the name Kaistella soli sp. nov. is proposed with the type strain DKR-2T (= KACC 22070T = NBRC 114725T). [This study was supported by Creative Challenge Research Foundation Support Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF- 2020R1I1A1A01071920).] A002 Chitinibacter bivalviorum sp. -
The Subway Microbiome: Seasonal Dynamics and Direct Comparison Of
Gohli et al. Microbiome (2019) 7:160 https://doi.org/10.1186/s40168-019-0772-9 RESEARCH Open Access The subway microbiome: seasonal dynamics and direct comparison of air and surface bacterial communities Jostein Gohli1* , Kari Oline Bøifot1,2, Line Victoria Moen1, Paulina Pastuszek3, Gunnar Skogan1, Klas I. Udekwu4 and Marius Dybwad1,2 Abstract Background: Mass transit environments, such as subways, are uniquely important for transmission of microbes among humans and built environments, and for their ability to spread pathogens and impact large numbers of people. In order to gain a deeper understanding of microbiome dynamics in subways, we must identify variables that affect microbial composition and those microorganisms that are unique to specific habitats. Methods: We performed high-throughput 16S rRNA gene sequencing of air and surface samples from 16 subway stations in Oslo, Norway, across all four seasons. Distinguishing features across seasons and between air and surface were identified using random forest classification analyses, followed by in-depth diversity analyses. Results: There were significant differences between the air and surface bacterial communities, and across seasons. Highly abundant groups were generally ubiquitous; however, a large number of taxa with low prevalence and abundance were exclusively present in only one sample matrix or one season. Among the highly abundant families and genera, we found that some were uniquely so in air samples. In surface samples, all highly abundant groups were also well represented in air samples. This is congruent with a pattern observed for the entire dataset, namely that air samples had significantly higher within-sample diversity. We also observed a seasonal pattern: diversity was higher during spring and summer. -
Pigments Produced by the Bacteria Belonging to the Genus Arthrobacter Nuthathai Sutthiwong, Yanis Caro, Mireille Fouillaud, Philippe Laurent, A
Pigments produced by the bacteria belonging to the genus Arthrobacter Nuthathai Sutthiwong, Yanis Caro, Mireille Fouillaud, Philippe Laurent, A. Valla, Laurent Dufossé To cite this version: Nuthathai Sutthiwong, Yanis Caro, Mireille Fouillaud, Philippe Laurent, A. Valla, et al.. Pigments produced by the bacteria belonging to the genus Arthrobacter. 7th International Congress of Pigments in Food – New technologies towards health, through colors, Jun 2013, Novara, Italy. 2016. hal- 01397507 HAL Id: hal-01397507 https://hal.archives-ouvertes.fr/hal-01397507 Submitted on 16 Nov 2016 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Public Domain Pigments produced by the bacteria belonging to the genus Arthrobacter Sutthiwong N.1, 2, Caro Y.2, Fouillaud M.2, Laurent P.3, Valla A.4, Dufossé L.2,5 1 Agricultural Technology Department, Thailand Institute of Scientific and Technological Research, Pathum Thani, Thailand 2 Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments, Université de La Réunion, ESIROI Agroalimentaire,Sainte-Clotilde, -
Corynebacterium Sp.|NML98-0116
1 Limnochorda_pilosa~GCF_001544015.1@NZ_AP014924=Bacteria-Firmicutes-Limnochordia-Limnochordales-Limnochordaceae-Limnochorda-Limnochorda_pilosa 0,9635 Ammonifex_degensii|KC4~GCF_000024605.1@NC_013385=Bacteria-Firmicutes-Clostridia-Thermoanaerobacterales-Thermoanaerobacteraceae-Ammonifex-Ammonifex_degensii 0,985 Symbiobacterium_thermophilum|IAM14863~GCF_000009905.1@NC_006177=Bacteria-Firmicutes-Clostridia-Clostridiales-Symbiobacteriaceae-Symbiobacterium-Symbiobacterium_thermophilum Varibaculum_timonense~GCF_900169515.1@NZ_LT827020=Bacteria-Actinobacteria-Actinobacteria-Actinomycetales-Actinomycetaceae-Varibaculum-Varibaculum_timonense 1 Rubrobacter_aplysinae~GCF_001029505.1@NZ_LEKH01000003=Bacteria-Actinobacteria-Rubrobacteria-Rubrobacterales-Rubrobacteraceae-Rubrobacter-Rubrobacter_aplysinae 0,975 Rubrobacter_xylanophilus|DSM9941~GCF_000014185.1@NC_008148=Bacteria-Actinobacteria-Rubrobacteria-Rubrobacterales-Rubrobacteraceae-Rubrobacter-Rubrobacter_xylanophilus 1 Rubrobacter_radiotolerans~GCF_000661895.1@NZ_CP007514=Bacteria-Actinobacteria-Rubrobacteria-Rubrobacterales-Rubrobacteraceae-Rubrobacter-Rubrobacter_radiotolerans Actinobacteria_bacterium_rbg_16_64_13~GCA_001768675.1@MELN01000053=Bacteria-Actinobacteria-unknown_class-unknown_order-unknown_family-unknown_genus-Actinobacteria_bacterium_rbg_16_64_13 1 Actinobacteria_bacterium_13_2_20cm_68_14~GCA_001914705.1@MNDB01000040=Bacteria-Actinobacteria-unknown_class-unknown_order-unknown_family-unknown_genus-Actinobacteria_bacterium_13_2_20cm_68_14 1 0,9803 Thermoleophilum_album~GCF_900108055.1@NZ_FNWJ01000001=Bacteria-Actinobacteria-Thermoleophilia-Thermoleophilales-Thermoleophilaceae-Thermoleophilum-Thermoleophilum_album -
Draft Genome Sequence of Arthrobacter Sp. Strain UCD-GKA (Phylum Actinobacteria)
PROKARYOTES crossm Downloaded from Draft Genome Sequence of Arthrobacter sp. Strain UCD-GKA (Phylum Actinobacteria) Gregory N. Kincheloe,a Jonathan A. Eisen,a,b David A. Coila http://genomea.asm.org/ University of California, Davis Genome Center, Davis, California, USAa; Department of Evolution and Ecology and Department of Medical Microbiology and Immunology, University of California Davis, Davis, California, USAb ABSTRACT Here we present the draft genome of Arthrobacter sp. strain UCD-GKA. The assembly contains 4,930,274 bp in 33 contigs. This strain was isolated from the Received 29 November 2016 Accepted 1 December 2016 Published 9 February 2017 handle of a weight bar in the UC Davis Activities and Recreation Center. Citation Kincheloe GN, Eisen JA, Coil DA. 2017. Draft genome sequence of Arthrobacter sp. strain UCD-GKA (phylum Actinobacteria). embers of the genus Arthrobacter are aerobic, Gram-positive bacteria (1) primarily Genome Announc 5:e01599-16. https:// doi.org/10.1128/genomeA.01599-16. Mknown for switching between the bacilli and cocci shapes depending on the on February 28, 2017 by UNIVERSITY OF CALIFORNIA-DAVIS environmental conditions (2). They are commonly found in soil. Copyright © 2017 Kincheloe et al. This is an open-access article distributed under the terms Arthrobacter sp. strain UCD-GKA was isolated from a squatting bar located in the of the Creative Commons Attribution 4.0 weight room of the UC Davis Activities and Recreation Center. This was part of an International license. undergraduate research project to provide microbial reference genomes of bacteria Address correspondence to Jonathan A. Eisen, isolated from the built environment (http://www.microbe.net). -
Within-Arctic Horizontal Gene Transfer As a Driver of Convergent Evolution in Distantly Related 1 Microalgae 2 Richard G. Do
bioRxiv preprint doi: https://doi.org/10.1101/2021.07.31.454568; this version posted August 2, 2021. 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-NC-ND 4.0 International license. 1 Within-Arctic horizontal gene transfer as a driver of convergent evolution in distantly related 2 microalgae 3 Richard G. Dorrell*+1,2, Alan Kuo3*, Zoltan Füssy4, Elisabeth Richardson5,6, Asaf Salamov3, Nikola 4 Zarevski,1,2,7 Nastasia J. Freyria8, Federico M. Ibarbalz1,2,9, Jerry Jenkins3,10, Juan Jose Pierella 5 Karlusich1,2, Andrei Stecca Steindorff3, Robyn E. Edgar8, Lori Handley10, Kathleen Lail3, Anna Lipzen3, 6 Vincent Lombard11, John McFarlane5, Charlotte Nef1,2, Anna M.G. Novák Vanclová1,2, Yi Peng3, Chris 7 Plott10, Marianne Potvin8, Fabio Rocha Jimenez Vieira1,2, Kerrie Barry3, Joel B. Dacks5, Colomban de 8 Vargas2,12, Bernard Henrissat11,13, Eric Pelletier2,14, Jeremy Schmutz3,10, Patrick Wincker2,14, Chris 9 Bowler1,2, Igor V. Grigoriev3,15, and Connie Lovejoy+8 10 11 1 Institut de Biologie de l'ENS (IBENS), Département de Biologie, École Normale Supérieure, CNRS, 12 INSERM, Université PSL, 75005 Paris, France 13 2CNRS Research Federation for the study of Global Ocean Systems Ecology and Evolution, 14 FR2022/Tara Oceans GOSEE, 3 rue Michel-Ange, 75016 Paris, France 15 3 US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, 1 16 Cyclotron Road, Berkeley, -
Biochemical and Phylogenetic Analyses of Psychrophilic Isolates Belonging to the Arthrobacter Subgroup and Description of Arthrobacter Psychrolactophilus, Sp
Arch Microbiol (1999) 171:355–363 © Springer-Verlag 1999 ORIGINAL PAPER Jennifer Loveland-Curtze · Peter P. Sheridan · Kevin R. Gutshall · Jean E. Brenchley Biochemical and phylogenetic analyses of psychrophilic isolates belonging to the Arthrobacter subgroup and description of Arthrobacter psychrolactophilus, sp. nov. Received: 17 December 1998 / Accepted: 12 March 1999 Abstract During our work on psychrophilic microorgan- their cold-active enzymes, particularly β-galactosidases. isms we obtained a large collection of new isolates. In or- During this work we have isolated numerous organisms der to identify six of these, we examined their growth pro- from geographically distant habitats ranging from Penn- perties, cell wall compositions, and their 16S rRNA gene sylvania farmlands to Antarctica. Many of these psy- sequences. The results showed that all of the isolates are chrophiles are gram-positive, non-spore-forming rods. gram-positive, aerobic, contain lysine in their cell walls, Four isolates (B7, D2, D5, and D10) were physiologically and belong to the high mol% G+C Arthrobacter subgroup. characterized and assigned to the genus Arthrobacter be- Phylogenetic analysis of the 16S rRNA genes grouped cause they are strict aerobes, have rod/coccus morpholog- five isolates obtained from a small geographical region ical cycles, and contain lysine in their cell walls (Love- into a monophyletic clade. Isolate B7 had a 16S rRNA se- land et al. 1994; DePrada et al. 1996). quence that was 94.3% similar to that of Arthrobacter Arthrobacter species are members of the high mol% polychromogenes and 94.4% similar to that of Arthro- G+C actinomycete-coryneform bacteria (Stackebrandt bacter oxydans. -
Bacterial Community Change Through Drinking Water Treatment Processes
Int. J. Environ. Sci. Technol. (2015) 12:1867–1874 DOI 10.1007/s13762-014-0540-0 ORIGINAL PAPER Bacterial community change through drinking water treatment processes X. Liao • C. Chen • Z. Wang • C.-H. Chang • X. Zhang • S. Xie Received: 28 August 2012 / Revised: 30 September 2013 / Accepted: 5 March 2014 / Published online: 18 March 2014 Ó Islamic Azad University (IAU) 2014 Abstract The microbiological quality of drinking water Introduction has aroused increasing attention due to potential public health risks. Knowledge of the bacterial ecology in the The microbiological quality of drinking water has aroused effluents of drinking water treatment units will be of practical increasing attention due to potential public health risks. importance. However, the bacterial community in the The conventional treatment process, composed of coagu- effluents of drinking water filters remains poorly understood. lation–flocculation, sedimentation, rapid sand filtration, The changes of the density of viable heterotrophic bacteria and disinfection, is still widely used by drinking water and bacterial populations through a pilot-scale drinking producers to remove turbidity and pathogens. The con- water treatment process were investigated using heterotro- ventional treatment process is not efficient in removal of phic plate counts and clone library analysis, respectively. biodegradable dissolved organic carbon (BDOC) that is The pilot-scale treatment process was composed of preozo- mainly responsible for the microbial regrowth in drinking nation, rapid mixing, flocculation, sedimentation, sand fil- water distribution systems (DWDS). Biological activated tration postozonation, and biological activated carbon carbon (BAC) filtration can perform well in reduction of (BAC) filtration. The results indicated that heterotrophic organic pollutants after the attachment of the indigenous plate counts decreased dramatically through the drinking microbiota attached to the porous surface of granular water treatment processes. -
Phylogenetic Diversity of Gram-Positive Bacteria and Their Secondary Metabolite Genes
UC San Diego Research Theses and Dissertations Title Phylogenetic Diversity of Gram-positive Bacteria and Their Secondary Metabolite Genes Permalink https://escholarship.org/uc/item/06z0868t Author Gontang, Erin A Publication Date 2008 Peer reviewed eScholarship.org Powered by the California Digital Library University of California UNIVERSITY OF CALIFORNIA, SAN DIEGO Phylogenetic Diversity of Gram-positive Bacteria and Their Secondary Metabolite Genes A Dissertation submitted in partial satisfaction of the requirements for the degree Doctor of Philosophy in Oceanography by Erin Ann Gontang Committee in charge: William Fenical, Chair Douglas H. Bartlett Bianca Brahamsha William Gerwick Paul R. Jensen Kit Pogliano 2008 3324374 3324374 2008 The Dissertation of Erin Ann Gontang is approved, and it is acceptable in quality and form for publication on microfilm: ____________________________________ ____________________________________ ____________________________________ ____________________________________ ____________________________________ ____________________________________ Chair University of California, San Diego 2008 iii DEDICATION To John R. Taylor, my incredible partner, my best friend and my love. ***** To my mom, Janet M. Gontang, and my dad, Austin J. Gontang. Your generous support and unconditional love has allowed me to create my future. Thank you. ***** To my sister, Allison C. Gontang, who is as proud of me as I am of her. You are a constant source of inspiration and I am so fortunate to have you in my life. iv TABLE OF CONTENTS -
Gokul Jarishma Keriuscia Vol1
SUPRAGLACIAL SYSTEMS BIOLOGY OF DYNAMIC ARCTIC MICROBIAL ECOSYSTEMS A thesis submitted for the degree of Philosophiae Doctor (Doctor of Philosophy) by Jarishma Keriuscia Gokul (MSc, BTech (Hons), BSc) Interdisciplinary Centre for Environmental Microbiology Institute for Biological, Environmental and Rural Sciences Aberystwyth University May 2017 DECLARATION Word count of thesis: .……………………………………………………………………………….…………….57 348 DECLARATION This work has not previously been accepted in substance for any degree and is not being concurrently submitted in candidature for any degree. Candidate name ……………………………………………………………………………………………………….Jarishma Keriuscia Gokul Signature …………………………………………………………………………………………………………………. Date ………………………………………………………………………………………………………………………….30 May 2017 STATEMENT 1 This thesis is the result of my own investigations, except where otherwise stated. Where correction services have been used, the extent and nature of the correction is clearly marked in a footnote(s). Other sources are acknowledged by footnotes giving explicit references. A bibliography is appended. Signature …………………………………………………………………………………………………………………. Date ………………………………………………………………………………………………………………………….30 May 2017 STATEMENT 2 I hereby give consent for my thesis, if accepted, to be available for photocopying and for inter-library loan, and for the title and summary to be made available to outside organisations. Signature …………………………………………………………………………………………………………………. Date ………………………………………………………………………………………………………………………….30 May 2017 i SUMMARY Arctic glacier surfaces -
Benemérita Universidad Autónoma De Puebla
BENEMÉRITA UNIVERSIDAD AUTÓNOMA DE PUEBLA INSTITUTO DE CIENCIAS CENTRO DE INVESTIGACIONES EN CIENCIAS MICROBIOLÓGICAS POSGRADO EN MICROBIOLOGÍA DIVERSIDAD BACTERIANA METILOTRÓFICA ASOCIADA A LA CACTÁCEA Neobuxbaumia macrocephala, ENDÉMICA EN RIESGO DE LA RESERVA TEHUACÁN CUICATLÁN TESIS QUE PARA OBTENER EL GRADO DE: DOCTORA EN CIENCIAS (MICROBIOLOGÍA) PRESENTA: MC MARÍA DEL ROCÍO BUSTILLOS CRISTALES ASESOR DE TESIS: DC LUIS ERNESTO FUENTES RAMÍREZ PUEBLA, PUE. AGOSTO, 2017 Índice RESUMEN………………………………………………………............................1 ABSTRACT………………………………………………………………………..2 INTRODUCCIÓN………………………………………………………………….3 ANTECEDENTES………………………………………………...........................10 JUSTIFICACIÓN………………………………………………………………….11 OBJETIVOS……………………………………………………………………….11 General…………………………………………………………………………...11 Particulares……………………………………………………………………… 11 MATERIALES Y MÉTODOS…………………………………………………….12 1. Zona de muestreo…………………………………………………………..12 2. Aislamiento………………………………………………………………...13 3. Caracterización Fenotípica………………………………………………....13 3.1 Morfología microscópica ……………………………………………... 13 3.2 Morfología colonial…………………………………………………… 13 3.3 Características bioquímicas y fisiológicas de los aislados……………. 13 3.3.1. Pruebas Bioquímicas……………………………………….. 14 3.3.2 Crecimiento en diferentes fuentes de carbono……………… 14 3.3.3. Determinación de condiciones óptimas de crecimiento……. 14 3.3.3.1 Crecimiento a diferentes temperaturas……………. 14 3.3.3.2. Crecimiento bacteriano a diferentes pH………….. 14 3.3.3.3. Tolerancia a la presencia de cloruro de sodio……..15 en el medio 3.3.4 Comportamiento antimicrobiano…………………………….15 3.3.5 Crecimiento en metanol dependiente de Ca2+ y Ce3+ 15 4. Caracterización genotípica 15 4.1 Extracción de DNA genómico 15 4.2 PCR para la amplificación del gen que codifica la subunidad 16S rRNA 16 4.3 Amplificación del gen que codifica la subunidad 23S rRNA 16 i 4.4 Determinación de genes que codifican para la enzima metanol deshidrogenasa 17 4.4.1 PCR para amplificar genes involucrados en la metilotrofía 17 4.4.2.