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Systematic and Applied Microbiology

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https://www.readbyqxmd.com/read/28690052/lebetimonas-natsushimae-sp-nov-a-novel-strictly-anaerobic-moderately-thermophilic-chemoautotroph-isolated-from-a-deep-sea-hydrothermal-vent-polychaete-nest-in-the-mid-okinawa-trough
#1
Ryousuke Nagata, Yoshihiro Takaki, Akihiro Tame, Takuro Nunoura, Hisashi Muto, Sayaka Mino, Shigeki Sawayama, Ken Takai, Satoshi Nakagawa
A moderately thermophilic, strictly anaerobic, chemoautotrophic bacterium, designated strain HS1857(T), was isolated from a deep-sea hydrothermal vent at the Noho site in the Mid-Okinawa Trough. Strain HS1857(T) grew between 35 and 63°C (optimum 55°C), in the presence of 10-55gl(-1) NaCl (optimum 25gl(-1)), and pH 5.5-7.1 (optimum 6.4). Growth occurred with molecular hydrogen as the electron donor and elemental sulfur, nitrate, or selenate as the electron acceptors. Formate could serve as an alternative electron donor with nitrate as an electron acceptor...
July 4, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28711161/role-of-fatty-acids-in-cold-adaptation-of-antarctic-psychrophilic-flavobacterium-spp
#2
Stanislava Králová
Cold-loving microorganisms developed numerous adaptation mechanisms allowing them to survive in extremely cold habitats, such as adaptation of the cell membrane. The focus of this study was on the membrane fatty acids of Antarctic Flavobacterium spp., and their adaptation response to cold-stress. Fatty acids and cold-response of Antarctic flavobacteria was also compared to mesophilic and thermophilic members of the genus Flavobacterium. The results showed that the psychrophiles produced more types of major fatty acids than meso- and thermophilic members of this genus, namely C15:1 iso G, C15:0 iso, C15:0 anteiso, C15:1ω6c, C15:0 iso 3OH, C17:1ω6c, C16:0 iso 3OH and C17:0 iso 3OH, summed features 3 (C16:1ω7cand/or C16:1ω6c) and 9 (C16:0 10-methyl and/or C17:1 iso ω9c)...
July 3, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28705596/isolation-and-characterization-of-aerobic-anoxygenic-phototrophs-from-exposed-soils-from-the-s%C3%A3-r-rondane-mountains-east-antarctica
#3
Guillaume Tahon, Anne Willems
This study investigated the culturable aerobic phototrophic bacteria present in soil samples collected in the proximity of the Belgian Princess Elisabeth Station in the Sør Rondane Mountains, East Antarctica. Until recently, only oxygenic phototrophic bacteria (Cyanobacteria) were well known from Antarctic soils. However, more recent non-cultivation-based studies have demonstrated the presence of anoxygenic phototrophs and, particularly, aerobic anoxygenic phototrophic bacteria in these areas. Approximately 1000 isolates obtained after prolonged incubation under different growth conditions were studied and characterized by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry...
June 27, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28648725/thaumasiovibrio-occultus-gen-nov-sp-nov-and-thaumasiovibrio-subtropicus-sp-nov-within-the-family-vibrionaceae-isolated-from-coral-reef-seawater-off-ishigaki-island-japan
#4
A K M Rohul Amin, Mami Tanaka, Nurhidayu Al-Saari, Gao Feng, Sayaka Mino, Yoshitoshi Ogura, Tetsuya Hayashi, Pedro M Meirelles, Fabiano L Thompson, Bruno Gomez-Gil, Toko Sawabe, Tomoo Sawabe
Two phylogenetically distinct Vibrionaceae strains C4II189(T) and C4V358(T) isolated from reef seawater off Ishigaki Island, Japan, in 2014 were studied with advanced genome-based taxonomy approaches. All aspects of phylogenetic (16S rRNA phylogeny, MLSA), phenotypic and genetic (ANI, DDH, AAI, and the number of core genes) cohesions between the two identified species were high enough to propose them as members of a new genus within the family Vibrionaceae. Consequently, an eighth genus Thaumasiovibrio gen...
July 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28641923/rhodobacteraceae-on-the-marine-brown-alga-fucus-spiralis-are-abundant-and-show-physiological-adaptation-to-an-epiphytic-lifestyle
#5
Marco Dogs, Bernd Wemheuer, Laura Wolter, Nils Bergen, Rolf Daniel, Meinhard Simon, Thorsten Brinkhoff
Macroalgae harbour specific microbial communities on their surface that have functions related to host health and defence. In this study, the bacterial biofilm of the marine brown alga Fucus spiralis was investigated using 16S rRNA gene amplicon-based analysis and isolation of bacteria. Rhodobacteraceae (Alphaproteobacteria) were the predominant family constituting 23% of the epibacterial community. At the genus level, Sulfitobacter, Loktanella, Octadecabacter and a previously undescribed cluster were most abundant, and together they comprised 89% of the Rhodobacteraceae...
June 15, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28625721/kiloniella-majae-sp-nov-isolated-from-spider-crab-maja-brachydactyla-and-pullet-carpet-shell-clam-venerupis-pullastra
#6
Diego Gerpe, Noemí Buján, Ana L Diéguez, Aide Lasa, Jesús L Romalde
Ten Gram-negative, rod-shaped and motile bacterial strains were isolated from spider crab (M27.10, M27.11a, F36.1, F36.4, M56.1, F76.17b, M146.1, M166.3 and M166.6) and pullet carpet shell clam (SBRF 1.10) collected in the coast of Galicia. Analyses of the 16S rRNA genes showed that the strains belong to the genus Kiloniella and have high similarity with the species Kiloniella spongiae (99.44-99.86%) and Kiloniella litopenaei (99.0-99.5%). Strains M56.1(T) (=CECT 9195, =LMG 29925), M146.1 (=CECT 9193, =LMG 29926) and SBRF 1...
July 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28688535/caballeronia-mineralivorans-sp-nov-isolated-from-oak-scleroderma-citrinum-mycorrhizosphere
#7
S Uroz, P Oger
Six bacterial strains were isolated from the oak-Scleroderma citrinum ectomycorrhizosphere in acidic and nutrient-poor forest soil for their high efficacy to weather minerals. Four of the six isolates, PML1(12)(T) and PML1(4), PML1(14) and PML1(16), were further characterized extensively. They were Gram negative, obligate aerobic, motile, non spore forming and rod-shaped. The major fatty acids of strain PML1(12)(T) were cyclo-C17:0, cyclo-C19:0-ω8c, C16:0 and C18:1-ω7c. The GC content of the DNA was 60.8%...
June 7, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28648724/nitrogen-fixing-rhizobial-strains-isolated-from-desmodium-incanum-dc-in-argentina-phylogeny-biodiversity-and-symbiotic-ability
#8
María Antonieta Toniutti, Laura Viviana Fornasero, Francisco Javier Albicoro, María Carla Martini, Walter Draghi, Florencia Alvarez, Antonio Lagares, José Francisco Pensiero, María Florencia Del Papa
Desmodium spp. are leguminous plants belonging to the tribe Desmodieae of the subfamily Papilionoideae. They are widely distributed in temperated and subtropical regions and are used as forage plants, for biological control, and in traditional folk medicine. The genus includes pioneer species that resist the xerothermic environment and grow in arid, barren sites. Desmodium species that form nitrogen-fixing symbiosis with rhizobia play an important role in sustainable agriculture. In Argentina, 23 native species of this genus have been found, including Desmodium incanum...
July 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28648723/a-protocol-for-the-simultaneous-identification-of-chitin-containing-particles-and-their-associated-bacteria
#9
Florencia Biancalana, Germán A Kopprio, Rubén J Lara, Cecilia Alonso
Chitin is the second most abundant polymer on Earth, playing a crucial role in the biogeochemical cycles. A core issue for studying its processing in aquatic systems is the identification and enumeration of chitin-containing particles and organisms, ideally in a manner that can be directly linked to bulk chitin quantification. The aim of this study was the development of such a technique. We successfully combined the methodology of bulk chitin determination using wheat germ agglutinin (FITC-WGA) for staining chitin-containing particles and organisms along with CARD-FISH staining of either chitin-containing eukaryotic cells or bacteria associated with them...
July 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28647304/phylogenies-of-symbiotic-genes-of-bradyrhizobium-symbionts-of-legumes-of-economic-and-environmental-importance-in-brazil-support-the-definition-of-the-new-symbiovars-pachyrhizi-and-sojae
#10
Jakeline Renata Marçon Delamuta, Pâmela Menna, Renan Augusto Ribeiro, Mariangela Hungria
Bradyrhizobium comprises most tropical symbiotic nitrogen-fixing strains, but the correlation between symbiotic and core genes with host specificity is still unclear. In this study, the phylogenies of the nodY/K and nifH genes of 45 Bradyrhizobium strains isolated from legumes of economic and environmental importance in Brazil (Arachis hypogaea, Acacia auriculiformis, Glycine max, Lespedeza striata, Lupinus albus, Stylosanthes sp. and Vigna unguiculata) were compared to 16S rRNA gene phylogeny and genetic diversity by rep-PCR...
July 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28645701/effect-of-phosphate-solubilizing-bacteria-on-phosphorus-dynamics-and-the-bacterial-community-during-composting-of-sugarcane-industry-waste
#11
German A Estrada-Bonilla, Cintia M Lopes, Ademir Durrer, Paulo R L Alves, Nicolle Passaglia, Elke J B N Cardoso
Sugarcane processing generates a large quantity of residues, such as filter cake and ashes, which are sometimes composted prior to their amendment in soil. However, important issues still have to be addressed on this subject, such as the description of bacterial succession that occurs throughout the composting process and the possibilities of using phosphate-solubilizing bacteria (PSB) during the process to improve phosphorus (P) availability in the compost end product. Consequently, this study evaluated the bacterial diversity and P dynamics during the composting process when inoculated with Pseudomonas aeruginosa PSBR12 and Bacillus sp...
July 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28629639/atp-synthesis-capacity-of-pulsed-light-exposed-bacteria
#12
B Kramer, J Wunderlich, P Muranyi
The ability of four different bacteria to synthesize new ATP upon exposure to different doses of pulsed-light (PL) irradiation was investigated. The bacterial cells were PL treated on a gel surface, resuspended in phosphate buffered saline (PBS) and subsequently incubated in Tryptic Soy Broth (TSB) at 37°C. Cellular ATP levels were monitored during a 2h incubation period and compared to the respective colony count data. Although PL affected ATP production in a dose dependent manner, the results showed that bacteria, which had rendered unculturable after PL exposure, are still capable of generating significant quantities of ATP...
June 7, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28622795/desulfamplus-magnetovallimortis-gen-nov-sp-nov-a-magnetotactic-bacterium-from-a-brackish-desert-spring-able-to-biomineralize-greigite-and-magnetite-that-represents-a-novel-lineage-in-the-desulfobacteraceae
#13
Elodie C T Descamps, Caroline L Monteil, Nicolas Menguy, Nicolas Ginet, David Pignol, Dennis A Bazylinski, Christopher T Lefèvre
A magnetotactic bacterium, designated strain BW-1(T), was isolated from a brackish spring in Death Valley National Park (California, USA) and cultivated in axenic culture. The Gram-negative cells of strain BW-1(T) are relatively large and rod-shaped and possess a single polar flagellum (monotrichous). This strain is the first magnetotactic bacterium isolated in axenic culture capable of producing greigite and/or magnetite nanocrystals aligned in one or more chains per cell. Strain BW-1(T) is an obligate anaerobe that grows chemoorganoheterotrophically while reducing sulfate as a terminal electron acceptor...
May 31, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28552245/pseudomonas-caspiana-sp-nov-a-citrus-pathogen-in-the-pseudomonas-syringae-phylogenetic-group
#14
Antonio Busquets, Margarita Gomila, Farid Beiki, Magdalena Mulet, Heshmat Rahimian, Elena García-Valdés, Jorge Lalucat
In a screening by multilocus sequence analysis of Pseudomonas strains isolated from diverse origins, 4 phylogenetically closely related strains (FBF58, FBF102(T), FBF103, and FBF122) formed a well-defined cluster in the Pseudomonas syringae phylogenetic group. The strains were isolated from citrus orchards in northern Iran with disease symptoms in the leaves and stems and its pathogenicity against citrus plants was demonstrated. The whole genome of the type strain of the proposed new species (FBF102(T)=CECT 9164(T)=CCUG 69273(T)) was sequenced and characterized...
July 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28499469/phylogenetically-diverse-groups-of-bradyrhizobium-isolated-from-nodules-of-tree-and-annual-legume-species-growing-in-ethiopia
#15
Tulu Degefu, Endalkachew Wolde-Meskel, Kedir Woliy, Åsa Frostegård
Bacteria belonging to the genus Bradyrhizobium nodulate various leguminous woody plants and herbs, including economically important crops such as soybean, peanut and cowpea. Here we analysed 39 Bradyrhizobium strains originating from root nodules of the leguminous trees and crops Acacia saligna, Faidherbia albida, Erythrina brucei, Albizia gummifera, Millettia ferruginea, Cajanus cajan, Vigna unguiculata and Phaseolus vulgaris, growing in southern Ethiopia. Multilocus sequence analyses (MLSA) of the 16S rRNA, glnII, recA, gyrB and dnaK genes and the ITS region grouped the test strains into seven well-supported genospecies (I-VII), six of which occupied distinct positions excluding all hitherto defined Bradyrhizobium species...
April 26, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28372899/phylogenetically-diverse-group-of-native-bacterial-symbionts-isolated-from-root-nodules-of-groundnut-arachis-hypogaea-l-in-south-africa
#16
Sanjay K Jaiswal, Levini A Msimbira, Felix D Dakora
Groundnut is an economically important N​2-fixing legume that can contribute about 100-190kgNha(-1) to cropping systems. In this study, groundnut-nodulating native rhizobia in South African soils were isolated from root nodules. Genetic analysis of isolates was done using restriction fragment length polymorphism (RFLP)-PCR of the intergenic spacer (IGS) region of 16S-23S rDNA. A total of 26 IGS types were detected with band sizes ranging from 471 to 1415bp. The rhizobial isolates were grouped into five main clusters with Jaccard's similarity coefficient of 0...
June 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28501448/pseudomonas-versuta-sp-nov-isolated-from-antarctic-soil
#17
Wah Seng See-Too, Sergio Salazar, Robson Ee, Peter Convey, Kok-Gan Chan, Álvaro Peix
In this study we analysed three bacterial strains coded L10.10(T), A4R1.5 and A4R1.12, isolated in the course of a study of quorum-quenching bacteria occurring in Antarctic soil. The 16S rRNA gene sequence was identical in the three strains and showed 99.7% pairwise similarity with respect to the closest related species Pseudomonas weihenstephanensis WS4993(T). Therefore, the three strains were classified within the genus Pseudomonas. Analysis of housekeeping genes (rpoB, rpoD and gyrB) sequences showed similarities of 84-95% with respect to the closest related species of Pseudomonas, confirming its phylogenetic affiliation...
April 18, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28495244/rumen-prokaryotic-communities-of-ruminants-under-different-feeding-paradigms-on-the-qinghai-tibetan-plateau
#18
Dan Xue, Huai Chen, Xinquan Zhao, Shixiao Xu, Linyong Hu, Tianwei Xu, Lin Jiang, Wei Zhan
Yak and Tibetan sheep are the major indigenous ruminants on the Qinghai-Tibetan Plateau in China. The aim of this work was to study the differences in ruminal fermentation parameters and rumen prokaryotic community composition between hosts and feeding paradigms. The 16S rRNA genes targeting bacteria and archaea were sequenced using the MiSeq platform. The results showed that the prokaryotic community structure between yak and Tibetan sheep was significantly different (P<0.01). A significant difference in structure was also found between groups of yaks barn fed with a total mixed ration (TMR) and those naturally grazing (NG) (P=0...
April 18, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28527624/understanding-aerobic-anaerobic-metabolism-in-caldibacillus-debilis-through-a-comparison-with-model-organisms
#19
Scott Wushke, Victor Spicer, Xiang Li Zhang, Brian Fristensky, Oleg V Krokhin, David B Levin, Nazim Cicek, Richard Sparling
Caldibacillus debilis GB1 is a facultative anaerobe isolated from a thermophilic aero-tolerant cellulolytic enrichment culture. There is a lack of representative proteomes of facultative anaerobic thermophilic Bacillaceae, exploring aerobic/anaerobic expression. The C. debilis GB1 genome was sequenced and annotated, and the proteome characterized under aerobic and anaerobic conditions while grown on cellobiose. The draft sequence of C. debilis GB1 contains a 3,340,752 bp chromosome and a 5,386 bp plasmid distributed over 49 contigs...
July 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28442158/diversity-and-evolutionary-aspects-of-mucin-binding-mucbp-domain-repeats-among-lactobacillus-plantarum-group-strains-through-comparative-genetic-analysis
#20
Sundru Manjulata Devi, Prakash M Halami
Mucin binding protein (Mub) of Lactobacillus plantarum- group (LPG) is considered as a potential marker gene due to its diversity and adherence property to host intestinal layer. We recently observed strain specific diversity in mub gene of LPG strains (n=8) and grouped them into Type I, II and III based on the insertion and/or deletion of MucBP domain repeats (Devi et al., 2016). The mub gene expression pattern noted by real-time PCR revealed 67.64 increased fold change in MTCC 9483 with four MucBP repeats...
April 12, 2017: Systematic and Applied Microbiology
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