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Draft Genome Sequence of Psychrobacter okhotskensis Strain 5179-1A, Isolated from a Raw Cured Ham Storage Crate. Microbiol Resour Announc 2020; 9:9/29/e00682-20. [PMID: 32675188 PMCID: PMC7365799 DOI: 10.1128/mra.00682-20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
We present the draft genome sequence of Psychrobacter okhotskensis strain 5179-1A, which was isolated from a raw cured ham storage crate. Its size and GC content are 3.4 Mb and 43.4%, respectively. The 16S rRNA sequences of strain 5179-1A and P. okhotskensis MD17T are 100% identical. We present the draft genome sequence of Psychrobacter okhotskensis strain 5179-1A, which was isolated from a raw cured ham storage crate. Its size and GC content are 3.4 Mb and 43.4%, respectively. The 16S rRNA sequences of strain 5179-1A and P. okhotskensis MD17T are 100% identical.
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Liu Q, Song W, Zhou Y, Dong X, Xin Y. Phenotypic divergence of thermotolerance: Molecular basis and cold adaptive evolution related to intrinsic DNA flexibility of glacier‐inhabitingCryobacteriumstrains. Environ Microbiol 2020; 22:1409-1420. [DOI: 10.1111/1462-2920.14957] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 02/01/2020] [Accepted: 02/18/2020] [Indexed: 11/30/2022]
Affiliation(s)
- Qing Liu
- China General Microbiological Culture Collection Center (CGMCC)Institute of Microbiology, Chinese Academy of Sciences Beijing 100101 China
| | - Wei‐Zhi Song
- Centre for Marine Bio‐InnovationUniversity of New South Wales Sydney New South Wales Australia
| | - Yu‐Guang Zhou
- China General Microbiological Culture Collection Center (CGMCC)Institute of Microbiology, Chinese Academy of Sciences Beijing 100101 China
| | - Xiu‐Zhu Dong
- State Key Laboratory of Microbial ResourcesInstitute of Microbiology, Chinese Academy of Sciences Beijing 100101 China
| | - Yu‐Hua Xin
- China General Microbiological Culture Collection Center (CGMCC)Institute of Microbiology, Chinese Academy of Sciences Beijing 100101 China
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Fredriksson NJ, Hermansson M, Wilén BM. Long-term dynamics of the bacterial community in a Swedish full-scale wastewater treatment plant. ENVIRONMENTAL TECHNOLOGY 2019; 40:912-928. [PMID: 29187074 DOI: 10.1080/09593330.2017.1411396] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 09/07/2017] [Indexed: 06/07/2023]
Abstract
The operational efficiency of activated sludge wastewater treatment plants depends to a large extent on the microbial community structure of the activated sludge. The aims of this paper are to describe the composition of the bacterial community in a Swedish full-scale activated sludge wastewater treatment plant, to describe the dynamics of the community and to elucidate possible causes for bacterial community composition changes. The bacterial community composition in the activated sludge was described using 16S rRNA gene libraries and monitored for 15 months by a terminal restriction fragment (T-RF) length polymorphism (T-RFLP) analysis of the 16S rRNA gene. Despite variable environmental conditions, a large fraction of the observed T-RFs were present at all times, making up at least 50% in all samples, possibly representing a relatively stable core fraction of the bacterial community. However, the proportions of the different T-RFs in this fraction as well as the T-RFs in the more variable fraction showed a significant variation over time and temperature. The difference in community composition between summer and winter coincided with observed differences in floc structure. These observations suggest a relationship between floc properties and bacterial community composition, although additional experiments are required to determine causality.
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Affiliation(s)
- Nils Johan Fredriksson
- a Department of Architecture and Civil Engineering, Water Environment Technology , Chalmers University of Technology , Gothenburg , Sweden
| | - Malte Hermansson
- b Department of Chemistry and Molecular Biology, Microbiology , University of Gothenburg , Gothenburg , Sweden
| | - Britt-Marie Wilén
- a Department of Architecture and Civil Engineering, Water Environment Technology , Chalmers University of Technology , Gothenburg , Sweden
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Liu Q, Liu HC, Zhou YG, Xin YH. Genetic diversity of glacier-inhabiting Cryobacterium bacteria in China and description of Cryobacterium zongtaii sp. nov. and Arthrobacter glacialis sp. nov. Syst Appl Microbiol 2019; 42:168-177. [DOI: 10.1016/j.syapm.2018.10.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 09/20/2018] [Accepted: 10/08/2018] [Indexed: 10/28/2022]
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La Reau AJ, Meier-Kolthoff JP, Suen G. Sequence-based analysis of the genus Ruminococcus resolves its phylogeny and reveals strong host association. Microb Genom 2016; 2:e000099. [PMID: 28348838 PMCID: PMC5359413 DOI: 10.1099/mgen.0.000099] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 11/22/2016] [Indexed: 12/28/2022] Open
Abstract
It has become increasingly clear that the composition of mammalian gut microbial communities is substantially diet driven. These microbiota form intricate mutualisms with their hosts, which have profound implications on overall health. For example, many gut microbes are involved in the conversion of host-ingested dietary polysaccharides into host-usable nutrients. One group of important gut microbial symbionts are bacteria in the genus Ruminococcus. Originally isolated from the bovine rumen, ruminococci have been found in numerous mammalian hosts, including other ruminants, and non-ruminants such as horses, pigs and humans. All ruminococci require fermentable carbohydrates for growth, and their substrate preferences appear to be based on the diet of their particular host. Most ruminococci that have been studied are those capable of degrading cellulose, much less is known about non-cellulolytic non-ruminant-associated species, and even less is known about the environmental distribution of ruminococci as a whole. Here, we capitalized on the wealth of publicly available 16S rRNA gene sequences, genomes and large-scale microbiota studies to both resolve the phylogenetic placement of described species in the genus Ruminococcus, and further demonstrate that this genus has largely unexplored diversity and a staggering host distribution. We present evidence that ruminococci are predominantly associated with herbivores and omnivores, and our data supports the hypothesis that very few ruminococci are found consistently in non-host-associated environments. This study not only helps to resolve the phylogeny of this important genus, but also provides a framework for understanding its distribution in natural systems.
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Affiliation(s)
- Alex J La Reau
- 1Department of Bacteriology, University of Wisconsin - Madison, Madison, WI 53706, USA
| | - Jan P Meier-Kolthoff
- 2Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, 38124 Braunschweig, Germany
| | - Garret Suen
- 1Department of Bacteriology, University of Wisconsin - Madison, Madison, WI 53706, USA
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Plaza DO, Gallardo C, Straub YD, Bravo D, Pérez-Donoso JM. Biological synthesis of fluorescent nanoparticles by cadmium and tellurite resistant Antarctic bacteria: exploring novel natural nanofactories. Microb Cell Fact 2016; 15:76. [PMID: 27154202 PMCID: PMC4858823 DOI: 10.1186/s12934-016-0477-8] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 04/27/2016] [Indexed: 11/10/2022] Open
Abstract
Background Fluorescent nanoparticles or quantum dots (QDs) have been intensely studied for basic and applied research due to their unique size-dependent properties. There is an increasing interest in developing ecofriendly methods to synthesize these nanoparticles since they improve biocompatibility and avoid the generation of toxic byproducts. The use of biological systems, particularly prokaryotes, has emerged as a promising alternative. Recent studies indicate that QDs biosynthesis is related to factors such as cellular redox status and antioxidant defenses. Based on this, the mixture of extreme conditions of Antarctica would allow the development of natural QDs producing bacteria. Results In this study we isolated and characterized cadmium and tellurite resistant Antarctic bacteria capable of synthesizing CdS and CdTe QDs when exposed to these oxidizing heavy metals. A time dependent change in fluorescence emission color, moving from green to red, was determined on bacterial cells exposed to metals. Biosynthesis was observed in cells grown at different temperatures and high metal concentrations. Electron microscopy analysis of treated cells revealed nanometric electron-dense elements and structures resembling membrane vesicles mostly associated to periplasmic space. Purified biosynthesized QDs displayed broad absorption and emission spectra characteristic of biogenic Cd nanoparticles. Conclusions Our work presents a novel and simple biological approach to produce QDs at room temperature by using heavy metal resistant Antarctic bacteria, highlighting the unique properties of these microorganisms as potent natural producers of nano-scale materials and promising candidates for bioremediation purposes.
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Affiliation(s)
- D O Plaza
- BioNanotechnology and Microbiology Laboratory, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias Biológicas, Universidad Andres Bello, República # 239, Santiago, Chile.,Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Sergio Livingstone Pohlhammer # 1007, Santiago, Chile
| | - C Gallardo
- BioNanotechnology and Microbiology Laboratory, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias Biológicas, Universidad Andres Bello, República # 239, Santiago, Chile
| | - Y D Straub
- BioNanotechnology and Microbiology Laboratory, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias Biológicas, Universidad Andres Bello, República # 239, Santiago, Chile
| | - D Bravo
- Laboratorio de Microbiología Oral, Facultad de Odontología, Universidad de Chile, Sergio Livingstone Pohlhammer # 943, Santiago, Chile
| | - J M Pérez-Donoso
- BioNanotechnology and Microbiology Laboratory, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias Biológicas, Universidad Andres Bello, República # 239, Santiago, Chile.
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Wang Z, Pan F, Hesham AEL, Gao Y, Zhang Y, Yang M. Impacts of produced water origin on bacterial community structures of activated sludge. J Environ Sci (China) 2015; 37:192-199. [PMID: 26574104 DOI: 10.1016/j.jes.2015.04.030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Revised: 04/20/2015] [Accepted: 04/22/2015] [Indexed: 06/05/2023]
Abstract
The purpose of this study was to reveal how activated sludge communities respond to influent quality and indigenous communities by treating two produced waters from different origins in a batch reactor in succession. The community shift and compositions were investigated using Polymerase Chain Reaction-denaturing gradient gel electrophoresis (PCR-DGGE) and further 16S ribosomal DNA (rDNA) clone library analysis. The abundance of targeted genes for polycyclic aromatic hydrocarbon (PAH) degradation, nahAc/phnAc and C12O/C23O, was tracked to define the metabolic ability of the in situ microbial community by Most Probable Number (MPN) PCR. The biosystem performed almost the same for treatment of both produced waters in terms of removals of chemical oxygen demand (COD) and PAHs. Sludge communities were closely associated with the respective influent bacterial communities (similarity>60%), while one sludge clone library was dominated by the Betaproteobacteria (38%) and Bacteriodetes (30%) and the other was dominated by Gammaproteobacteria (52%). This suggested that different influent and water quality have an effect on sludge community compositions. In addition, the existence of catabolic genes in sludge was consistent with the potential for degradation of PAHs in the treatment of both produced waters.
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Affiliation(s)
- Zhenyu Wang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Key Laboratory for Microorganisms and Functional Molecules, College of Life Science, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Feng Pan
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Abd El-Latif Hesham
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Genetics Department, Faculty of Agriculture, Assiut University, Assiut 71526, Egypt
| | - Yingxin Gao
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Yu Zhang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Min Yang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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Carr SA, Vogel SW, Dunbar RB, Brandes J, Spear JR, Levy R, Naish TR, Powell RD, Wakeham SG, Mandernack KW. Bacterial abundance and composition in marine sediments beneath the Ross Ice Shelf, Antarctica. GEOBIOLOGY 2013; 11:377-395. [PMID: 23682649 DOI: 10.1111/gbi.12042] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Accepted: 04/13/2013] [Indexed: 06/02/2023]
Abstract
Marine sediments of the Ross Sea, Antarctica, harbor microbial communities that play a significant role in the decomposition, mineralization, and recycling of organic carbon (OC). In this study, the cell densities within a 153-cm sediment core from the Ross Sea were estimated based on microbial phospholipid fatty acid (PLFA) concentrations and acridine orange direct cell counts. The resulting densities were as high as 1.7 × 10⁷ cells mL⁻¹ in the top ten centimeters of sediments. These densities are lower than those calculated for most near-shore sites but consistent with deep-sea locations with comparable sedimentation rates. The δ¹³C measurements of PLFAs and sedimentary and dissolved carbon sources, in combination with ribosomal RNA (SSU rRNA) gene pyrosequencing, were used to infer microbial metabolic pathways. The δ¹³C values of dissolved inorganic carbon (DIC) in porewaters ranged downcore from -2.5‰ to -3.7‰, while δ¹³C values for the corresponding sedimentary particulate OC (POC) varied from -26.2‰ to -23.1‰. The δ¹³C values of PLFAs ranged between -29‰ and -35‰ throughout the sediment core, consistent with a microbial community dominated by heterotrophs. The SSU rRNA gene pyrosequencing revealed that members of this microbial community were dominated by β-, δ-, and γ-Proteobacteria, Actinobacteria, Chloroflexi and Bacteroidetes. Among the sequenced organisms, many appear to be related to known heterotrophs that utilize OC sources such as amino acids, oligosaccharides, and lactose, consistent with our interpretation from δ¹³CPLFA analysis. Integrating phospholipids analyses with porewater chemistry, δ¹³CDIC and δ¹³CPOC values and SSU rRNA gene sequences provides a more comprehensive understanding of microbial communities and carbon cycling in marine sediments, including those of this unique ice shelf environment.
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Affiliation(s)
- S A Carr
- Department of Chemistry and Geochemistry, Colorado School of Mines, Golden, CO, USA
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Canion A, Prakash O, Green SJ, Jahnke L, Kuypers MMM, Kostka JE. Isolation and physiological characterization of psychrophilic denitrifying bacteria from permanently cold Arctic fjord sediments (Svalbard, Norway). Environ Microbiol 2013; 15:1606-18. [DOI: 10.1111/1462-2920.12110] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Revised: 02/01/2013] [Accepted: 02/04/2013] [Indexed: 11/29/2022]
Affiliation(s)
- Andy Canion
- Earth Ocean and Atmospheric Science Department; Florida State University; Tallahassee; FL; USA
| | - Om Prakash
- Earth Ocean and Atmospheric Science Department; Florida State University; Tallahassee; FL; USA
| | | | - Linda Jahnke
- NASA Astrobiology Institute; Ames Research Center; Moffett Field; CA; USA
| | | | - Joel E. Kostka
- School of Biology; Georgia Institute of Technology; Atlanta; GA; USA
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Chen CX, Zhang XY, Liu C, Yu Y, Liu A, Li GW, Li H, Chen XL, Chen B, Zhou BC, Zhang YZ. Pseudorhodobacter antarcticus sp. nov., isolated from Antarctic intertidal sandy sediment, and emended description of the genus Pseudorhodobacter Uchino et al. 2002 emend. Jung et al. 2012. Int J Syst Evol Microbiol 2012; 63:849-854. [PMID: 22611201 DOI: 10.1099/ijs.0.042184-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-negative, aerobic, non-motile, pink-pigmented and rod-shaped strain, designated ZS3-33(T), was isolated from Antarctic intertidal sandy sediment. The strain grew optimally at 15 °C and with 1.0 % (w/v) NaCl. It reduced nitrate to nitrite and hydrolysed Tween 20. It could not produce bacteriochlorophyll a. The predominant cellular fatty acid was C18 : 1ω7c and the predominant respiratory quinone was Q-10. The major polar lipids were phosphatidylglycerol, phosphatidylcholine, two unidentified aminophospholipids and an unidentified aminolipid. Analyses of 16S rRNA gene sequences revealed that strain ZS3-33(T) belonged to the genus Pseudorhodobacter, showing 97.4 % similarity to the type strain of Pseudorhodobacter ferrugineus and 95.3 % similarity to the type strain of Pseudorhodobacter aquimaris. Levels of gyrB gene sequence similarity between strain ZS3-33(T) and the type strains of P. ferrugineus and P. aquimaris were 87.6 and 81.7 %, respectively. DNA-DNA relatedness between strain ZS3-33(T) and P. ferrugineus DSM 5888(T) was 56.6 %. The genomic DNA G+C content of strain ZS3-33(T) was 57.1 mol%. Based on data from this polyphasic study, strain ZS3-33(T) represents a novel species of the genus Pseudorhodobacter, for which the name Pseudorhodobacter antarcticus sp. nov. is proposed. The type strain is ZS3-33(T) ( = CGMCC 1.10836(T) = KCTC 23700(T)). An emended description of the genus Pseudorhodobacter Uchino et al. 2002 emend. Jung et al. 2012 is also proposed.
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Affiliation(s)
- Chun-Xiao Chen
- The State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Jinan 250100, PR China
| | - Xi-Ying Zhang
- The State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Jinan 250100, PR China
| | - Chang Liu
- The State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Jinan 250100, PR China
| | - Yong Yu
- SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, PR China
| | - Ang Liu
- The State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Jinan 250100, PR China
| | - Guo-Wei Li
- The State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Jinan 250100, PR China
| | - Hai Li
- The State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Jinan 250100, PR China
| | - Xiu-Lan Chen
- The State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Jinan 250100, PR China
| | - Bo Chen
- SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, PR China
| | - Bai-Cheng Zhou
- The State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Jinan 250100, PR China
| | - Yu-Zhong Zhang
- The State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Jinan 250100, PR China
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Yu Y, Li HR, Zeng YX, Sun K, Chen B. Pricia antarctica gen. nov., sp. nov., a member of the family Flavobacteriaceae, isolated from Antarctic intertidal sediment. Int J Syst Evol Microbiol 2011; 62:2218-2223. [PMID: 22081722 DOI: 10.1099/ijs.0.037515-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A yellow-coloured, rod-shaped, Gram-reaction- and Gram-staining-negative, non-motile and aerobic bacterium, designated strain ZS1-8(T), was isolated from a sample of sandy intertidal sediment collected from the Antarctic coast. Flexirubin-type pigments were absent. In phylogenetic analyses based on 16S rRNA gene sequences, strain ZS1-8(T) formed a distinct phyletic line and the results indicated that the novel strain should be placed in a new genus within the family Flavobacteriaceae. In pairwise comparisons between strain ZS1-8(T) and recognized species, the levels of 16S rRNA gene sequence similarity were all <93.3 %. The strain required Ca(2+) and K(+) ions as well as NaCl for growth. Optimal growth was observed at pH 7.5-8.0, 17-19 °C and with 2-3 % (w/v) NaCl. The major fatty acids were iso-C(15 : 1) G, iso-C(15 : 0), summed feature 3 (iso-C(15 : 0) 2-OH and/or C(16 : 1)ω7c), an unknown acid with an equivalent chain-length of 13.565 and iso-C(17 : 0) 3-OH. The major respiratory quinone was MK-6. The predominant polar lipid was phosphatidylethanolamine. The genomic DNA G+C content was 43.9 mol%. Based on the phylogenetic, phenotypic and chemotaxonomic data, strain ZS1-8(T) represents a novel species in a new genus in the family Flavobacteriaceae for which the name Pricia antarctica gen. nov., sp. nov. is proposed. The type strain of the type species is ZS1-8(T) (= JCM 17291(T) = DSM 23421(T)).
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Affiliation(s)
- Yong Yu
- SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, PR China
| | - Hui-Rong Li
- SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, PR China
| | - Yin-Xin Zeng
- SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, PR China
| | - Kun Sun
- SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, PR China
| | - Bo Chen
- SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, PR China
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Liu C, Chen CX, Zhang XY, Yu Y, Liu A, Li GW, Chen XL, Chen B, Zhou BC, Zhang YZ. Marinobacter antarcticus sp. nov., a halotolerant bacterium isolated from Antarctic intertidal sandy sediment. Int J Syst Evol Microbiol 2011; 62:1838-1844. [PMID: 21984673 DOI: 10.1099/ijs.0.035774-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-staining-negative, aerobic, motile, oxidase- and catalase-positive, rod-shaped strain, designated ZS2-30(T), was isolated from Antarctic intertidal sandy sediment. The strain grew at 4-35 °C (optimum, 25 °C) and in 0-25% (w/v) NaCl (optimum, 3.0-4.0%). It could reduce nitrate to nitrite and hydrolyse Tween 80. The predominant cellular fatty acids of strain ZS2-30(T) were summed feature 3 (C(16:1)ω7c and/or C(16:1)ω6c), C(16:0), C(18:1)ω9c, C(16:1)ω9c, C(12:0) 3-OH and C(12:0). The major polar lipids were phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol and an unidentified aminophospholipid. The genomic DNA G+C content of strain ZS2-30(T) was 55.8 mol%. Analyses of 16S rRNA gene sequences revealed that strain ZS2-30(T) was affiliated with the genus Marinobacter. It showed highest 16S rRNA gene sequence similarities to the type strains of three species of the genus Marinobacter, namely Marinobacter maritimus (98.3%), Marinobacter psychrophilus (98.1%) and Marinobacter goseongensis (97.1%), but the DNA-DNA relatedness values between strain ZS2-30(T) and the above three species were all lower than 45%. Moreover, strain ZS2-30(T) could be distinguished from closely related species of the genus Marinobacter by various phenotypic properties. Based on this taxonomic study using a polyphasic approach, strain ZS2-30(T) is considered to represent a novel species in the genus Marinobacter, for which the name Marinobacter antarcticus sp. nov. is proposed. The type strain of Marinobacter antarcticus is ZS2-30(T) ( = CGMCC 1.10835(T) = KCTC 23684(T)).
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Affiliation(s)
- Chang Liu
- The State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Jinan 250100, PR China
| | - Chun-Xiao Chen
- The State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Jinan 250100, PR China
| | - Xi-Ying Zhang
- The State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Jinan 250100, PR China
| | - Yong Yu
- SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, PR China
| | - Ang Liu
- The State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Jinan 250100, PR China
| | - Guo-Wei Li
- The State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Jinan 250100, PR China
| | - Xiu-Lan Chen
- The State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Jinan 250100, PR China
| | - Bo Chen
- SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, PR China
| | - Bai-Cheng Zhou
- The State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Jinan 250100, PR China
| | - Yu-Zhong Zhang
- The State Key Laboratory of Microbial Technology, Marine Biotechnology Research Center, Shandong University, Jinan 250100, PR China
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Yu Y, Yan SL, Li HR, Zhang XH. Roseicitreum antarcticum gen. nov., sp. nov., an aerobic bacteriochlorophyll a-containing alphaproteobacterium isolated from Antarctic sandy intertidal sediment. Int J Syst Evol Microbiol 2011; 61:2173-2179. [DOI: 10.1099/ijs.0.024885-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A novel Gram-negative, non-motile bacterium, designated strain ZS2-28T, was isolated from sandy intertidal sediment samples collected from the coastal regions of the Chinese Antarctic Zhongshan Station on the Larsemann Hills, Princess Elizabeth Land, East Antarctica. Strain ZS2-28T was obligately heterotrophic, strictly aerobic, psychrotolerant (growth occurred at 0–33 °C) and moderately halophilic (optimal growth in 7–8 % NaCl). A single major peak at 872–874 nm in the infrared absorption spectrum indicated the presence of bacteriochlorophyll a. Poly-β-hydroxybutyrate accumulation and slime production were also detected. The predominant cellular fatty acid was C18 : 1ω7c, with C10 : 0 3-OH, C16 : 0, C17 : 0 cyclo, C19 : 0ω8c cyclo and summed feature 3 (C16 : 1ω7c and/or iso-C15 : 0 2-OH) present in smaller amounts. The respiratory quinone was Q-10. The main polar lipids were phosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine and an unidentified aminolipid. The G+C content of the genomic DNA was 63.3 mol%. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain ZS2-28T formed a distinct evolutionary lineage within the clade containing members of the genera Roseibaca, Roseinatronobacter and Rhodobaca of the class Alphaproteobacteria. On the basis of its phylogenetic position, as well as its phenotypic and chemotaxonomic characteristics, strain ZS2-28T represents a novel species of a novel genus, for which the name Roseicitreum antarcticum gen. nov., sp. nov. is proposed. The type strain is ZS2-28T ( = CGMCC 1.8894T = LMG 24863T).
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Affiliation(s)
- Yong Yu
- SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, PR China
| | - Shu-Lin Yan
- Department of Marine Biology, Ocean University of China, Qingdao 266003, PR China
| | - Hui-Rong Li
- SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, PR China
| | - Xiao-Hua Zhang
- Department of Marine Biology, Ocean University of China, Qingdao 266003, PR China
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Peeters K, Hodgson DA, Convey P, Willems A. Culturable diversity of heterotrophic bacteria in Forlidas Pond (Pensacola Mountains) and Lundström Lake (Shackleton Range), Antarctica. MICROBIAL ECOLOGY 2011; 62:399-413. [PMID: 21424822 DOI: 10.1007/s00248-011-9842-7] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2011] [Accepted: 02/28/2011] [Indexed: 05/16/2023]
Abstract
Cultivation techniques were used to study the heterotrophic bacterial diversity in two microbial mat samples originating from the littoral zone of two continental Antarctic lakes (Forlidas Pond and Lundström Lake) in the Dufek Massif (within the Pensacola Mountains group of the Transantarctic Mountains) and Shackleton Range, respectively. Nearly 800 isolates were picked after incubation on several growth media at different temperatures. They were grouped using a whole-genome fingerprinting technique, repetitive element palindromic PCR and partial 16S rRNA gene sequencing. Phylogenetic analysis of the complete 16S rRNA gene sequences of 82 representatives showed that the isolates belonged to four major phylogenetic groups: Actinobacteria, Bacteroidetes, Proteobacteria and Firmicutes. A relatively large difference between the samples was apparent. Forlidas Pond is a completely frozen water body underlain by hypersaline brine, with summer thaw forming a slightly saline littoral moat. This was reflected in the bacterial diversity with a dominance of isolates belonging to Firmicutes, whereas isolates from the freshwater Lundström Lake revealed a dominance of Actinobacteria. A total of 42 different genera were recovered, including first records from Antarctica for Albidiferax, Bosea, Curvibacter, Luteimonas, Ornithinibacillus, Pseudoxanthomonas, Sphingopyxis and Spirosoma. Additionally, a considerable number of potential new species and new genera were recovered distributed over different phylogenetic groups. For several species where previously only the type strain was available in cultivation, we report additional strains. Comparison with public databases showed that overall, 72% of the phylotypes are cosmopolitan whereas 23% are currently only known from Antarctica. However, for the Bacteroidetes, the majority of the phylotypes recovered are at present known only from Antarctica and many of these represent previously unknown species.
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Affiliation(s)
- Karolien Peeters
- Laboratory of Microbiology, Department of Biochemistry and Microbiology, Fac. Science, Ghent University, K.L. Ledeganckstraat 35, 9000, Ghent, Belgium
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