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  Subjects -> BIOLOGY (Total: 3156 journals)
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BIOLOGY (1497 journals)                  1 2 3 4 5 6 7 8 | Last

Showing 1 - 200 of 1720 Journals sorted alphabetically
AAPS Journal     Hybrid Journal   (Followers: 22)
Achievements in the Life Sciences     Open Access   (Followers: 5)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 24)
Acta Biologica Colombiana     Open Access   (Followers: 7)
Acta Biologica Hungarica     Full-text available via subscription   (Followers: 4)
Acta Biologica Sibirica     Open Access  
Acta Biomaterialia     Hybrid Journal   (Followers: 27)
Acta Biotheoretica     Hybrid Journal   (Followers: 4)
Acta Chiropterologica     Full-text available via subscription   (Followers: 6)
acta ethologica     Hybrid Journal   (Followers: 4)
Acta Limnologica Brasiliensia     Open Access   (Followers: 3)
Acta Médica Costarricense     Open Access   (Followers: 2)
Acta Musei Silesiae, Scientiae Naturales : The Journal of Silesian Museum in Opava     Open Access  
Acta Neurobiologiae Experimentalis     Open Access  
Acta Parasitologica     Hybrid Journal   (Followers: 10)
Acta Scientiarum. Biological Sciences     Open Access   (Followers: 2)
Acta Scientifica Naturalis     Open Access   (Followers: 3)
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis     Open Access  
Actualidades Biológicas     Open Access   (Followers: 1)
Advanced Health Care Technologies     Open Access   (Followers: 4)
Advanced Journal of Graduate Research     Open Access  
Advanced Studies in Biology     Open Access  
Advances in Antiviral Drug Design     Full-text available via subscription   (Followers: 2)
Advances in Bioinformatics     Open Access   (Followers: 17)
Advances in Biological Regulation     Hybrid Journal   (Followers: 4)
Advances in Biology     Open Access   (Followers: 8)
Advances in Biosensors and Bioelectronics     Open Access   (Followers: 7)
Advances in Cell Biology     Open Access   (Followers: 25)
Advances in Cellular and Molecular Biology of Membranes and Organelles     Full-text available via subscription   (Followers: 12)
Advances in Developmental Biology     Full-text available via subscription   (Followers: 11)
Advances in DNA Sequence-Specific Agents     Full-text available via subscription   (Followers: 5)
Advances in Ecological Research     Full-text available via subscription   (Followers: 43)
Advances in Environmental Sciences - International Journal of the Bioflux Society     Open Access   (Followers: 17)
Advances in Enzyme Research     Open Access   (Followers: 10)
Advances in Experimental Biology     Full-text available via subscription   (Followers: 7)
Advances in Genome Biology     Full-text available via subscription   (Followers: 8)
Advances in High Energy Physics     Open Access   (Followers: 19)
Advances in Human Biology     Open Access   (Followers: 3)
Advances in Life Science and Technology     Open Access   (Followers: 16)
Advances in Life Sciences     Open Access   (Followers: 6)
Advances in Marine Biology     Full-text available via subscription   (Followers: 14)
Advances in Molecular and Cell Biology     Full-text available via subscription   (Followers: 21)
Advances in Organ Biology     Full-text available via subscription   (Followers: 1)
Advances in Planar Lipid Bilayers and Liposomes     Full-text available via subscription   (Followers: 3)
Advances in Regenerative Biology     Open Access   (Followers: 1)
Advances in Space Biology and Medicine     Full-text available via subscription   (Followers: 5)
Advances in Structural Biology     Full-text available via subscription   (Followers: 5)
Advances in Virus Research     Full-text available via subscription   (Followers: 5)
African Journal of Range & Forage Science     Hybrid Journal   (Followers: 6)
AFRREV STECH : An International Journal of Science and Technology     Open Access   (Followers: 1)
Ageing Research Reviews     Hybrid Journal   (Followers: 10)
Aging Cell     Open Access   (Followers: 12)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat     Open Access  
AJP Cell Physiology     Hybrid Journal   (Followers: 15)
AJP Endocrinology and Metabolism     Hybrid Journal   (Followers: 23)
AJP Lung Cellular and Molecular Physiology     Hybrid Journal   (Followers: 3)
Al-Kauniyah : Jurnal Biologi     Open Access  
Alasbimn Journal     Open Access   (Followers: 1)
Alces : A Journal Devoted to the Biology and Management of Moose     Open Access  
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Biology Teacher     Full-text available via subscription   (Followers: 14)
American Fern Journal     Full-text available via subscription   (Followers: 1)
American Journal of Agricultural and Biological Sciences     Open Access   (Followers: 8)
American Journal of Bioethics     Hybrid Journal   (Followers: 10)
American Journal of Human Biology     Hybrid Journal   (Followers: 13)
American Journal of Medical and Biological Research     Open Access   (Followers: 8)
American Journal of Plant Sciences     Open Access   (Followers: 19)
American Journal of Primatology     Hybrid Journal   (Followers: 14)
American Malacological Bulletin     Full-text available via subscription   (Followers: 3)
American Naturalist     Full-text available via subscription   (Followers: 71)
Amphibia-Reptilia     Hybrid Journal   (Followers: 6)
Anadolu University Journal of Science and Technology : C Life Sciences and Biotechnology     Open Access  
Anaerobe     Hybrid Journal   (Followers: 4)
Analytical Methods     Full-text available via subscription   (Followers: 10)
Anatomical Science International     Hybrid Journal   (Followers: 2)
Animal Cells and Systems     Hybrid Journal   (Followers: 4)
Annales de Limnologie - International Journal of Limnology     Hybrid Journal   (Followers: 1)
Annales françaises d'Oto-rhino-laryngologie et de Pathologie Cervico-faciale     Full-text available via subscription   (Followers: 3)
Annales Henri Poincaré     Hybrid Journal   (Followers: 3)
Annales UMCS, Biologia     Open Access   (Followers: 1)
Annals of Applied Biology     Hybrid Journal   (Followers: 7)
Annals of Biomedical Engineering     Hybrid Journal   (Followers: 18)
Annals of Human Biology     Hybrid Journal   (Followers: 5)
Annual Review of Biomedical Engineering     Full-text available via subscription   (Followers: 15)
Annual Review of Biophysics     Full-text available via subscription   (Followers: 23)
Annual Review of Cancer Biology     Full-text available via subscription   (Followers: 1)
Annual Review of Cell and Developmental Biology     Full-text available via subscription   (Followers: 37)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 13)
Annual Review of Genomics and Human Genetics     Full-text available via subscription   (Followers: 23)
Annual Review of Phytopathology     Full-text available via subscription   (Followers: 10)
Anthropological Review     Open Access   (Followers: 23)
Anti-Infective Agents     Hybrid Journal   (Followers: 3)
Antibiotics     Open Access   (Followers: 9)
Antioxidants     Open Access   (Followers: 4)
Antioxidants & Redox Signaling     Hybrid Journal   (Followers: 8)
Antonie van Leeuwenhoek     Hybrid Journal   (Followers: 5)
Anzeiger für Schädlingskunde     Hybrid Journal   (Followers: 1)
Apidologie     Hybrid Journal   (Followers: 4)
Apmis     Hybrid Journal   (Followers: 1)
APOPTOSIS     Hybrid Journal   (Followers: 8)
Applied Bionics and Biomechanics     Open Access   (Followers: 8)
Applied Vegetation Science     Full-text available via subscription   (Followers: 10)
Aquaculture Environment Interactions     Open Access   (Followers: 2)
Aquaculture International     Hybrid Journal   (Followers: 23)
Aquaculture Reports     Open Access   (Followers: 3)
Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society     Open Access   (Followers: 6)
Aquatic Biology     Open Access   (Followers: 5)
Aquatic Ecology     Hybrid Journal   (Followers: 33)
Aquatic Ecosystem Health & Management     Hybrid Journal   (Followers: 14)
Aquatic Science and Technology     Open Access   (Followers: 3)
Aquatic Toxicology     Hybrid Journal   (Followers: 21)
Archaea     Open Access   (Followers: 3)
Archiv für Molluskenkunde: International Journal of Malacology     Full-text available via subscription   (Followers: 3)
Archives of Biological Sciences     Open Access  
Archives of Microbiology     Hybrid Journal   (Followers: 8)
Archives of Natural History     Hybrid Journal   (Followers: 6)
Archives of Oral Biology     Hybrid Journal   (Followers: 2)
Archives of Virology     Hybrid Journal   (Followers: 5)
Archivum Immunologiae et Therapiae Experimentalis     Hybrid Journal   (Followers: 2)
Arid Ecosystems     Hybrid Journal   (Followers: 2)
Arquivos do Instituto Biológico     Open Access   (Followers: 1)
Arquivos do Museu Dinâmico Interdisciplinar     Open Access  
Arthropod Structure & Development     Hybrid Journal   (Followers: 2)
Arthropods     Open Access   (Followers: 1)
Artificial DNA: PNA & XNA     Hybrid Journal   (Followers: 3)
Artificial Photosynthesis     Open Access   (Followers: 1)
Asian Bioethics Review     Full-text available via subscription   (Followers: 3)
Asian Journal of Biodiversity     Open Access   (Followers: 4)
Asian Journal of Biological Sciences     Open Access   (Followers: 3)
Asian Journal of Cell Biology     Open Access   (Followers: 5)
Asian Journal of Developmental Biology     Open Access   (Followers: 2)
Asian Journal of Medical and Biological Research     Open Access   (Followers: 3)
Asian Journal of Nematology     Open Access   (Followers: 4)
Asian Journal of Poultry Science     Open Access   (Followers: 3)
Atti della Accademia Peloritana dei Pericolanti - Classe di Scienze Medico-Biologiche     Open Access  
Australian Life Scientist     Full-text available via subscription   (Followers: 2)
Australian Mammalogy     Hybrid Journal   (Followers: 6)
Autophagy     Hybrid Journal   (Followers: 2)
Avian Biology Research     Full-text available via subscription   (Followers: 4)
Avian Conservation and Ecology     Open Access   (Followers: 11)
Bacteriology Journal     Open Access   (Followers: 1)
Bacteriophage     Full-text available via subscription   (Followers: 3)
Bangladesh Journal of Bioethics     Open Access  
Bangladesh Journal of Plant Taxonomy     Open Access  
Bangladesh Journal of Scientific Research     Open Access   (Followers: 1)
Batman Üniversitesi Yaşam Bilimleri Dergisi     Open Access  
Berita Biologi     Open Access   (Followers: 1)
Between the Species     Open Access   (Followers: 1)
Bio Tribune Magazine     Hybrid Journal  
BIO Web of Conferences     Open Access  
BIO-Complexity     Open Access  
Bio-Grafía. Escritos sobre la Biología y su enseñanza     Open Access  
Bioanalytical Reviews     Hybrid Journal   (Followers: 2)
Biocatalysis and Biotransformation     Hybrid Journal   (Followers: 6)
BioCentury Innovations     Full-text available via subscription   (Followers: 1)
Biochemistry and Cell Biology     Hybrid Journal   (Followers: 15)
Biochimie     Hybrid Journal   (Followers: 7)
BioControl     Hybrid Journal   (Followers: 5)
Biocontrol Science and Technology     Hybrid Journal   (Followers: 5)
Biodemography and Social Biology     Hybrid Journal  
BioDiscovery     Open Access   (Followers: 2)
Biodiversitas : Journal of Biological Diversity     Open Access  
Biodiversity : Research and Conservation     Open Access   (Followers: 26)
Biodiversity Data Journal     Open Access   (Followers: 3)
Biodiversity Informatics     Open Access   (Followers: 1)
Biodiversity Information Science and Standards     Open Access  
Bioedukasi : Jurnal Pendidikan Biologi FKIP UM Metro     Open Access  
Bioeksperimen : Jurnal Penelitian Biologi     Open Access  
Bioelectrochemistry     Hybrid Journal   (Followers: 2)
Bioelectromagnetics     Hybrid Journal   (Followers: 1)
Bioenergy Research     Hybrid Journal   (Followers: 2)
Bioengineering and Bioscience     Open Access   (Followers: 1)
BioEssays     Hybrid Journal   (Followers: 10)
Bioethics     Hybrid Journal   (Followers: 14)
BioéthiqueOnline     Open Access  
Biofabrication     Hybrid Journal   (Followers: 5)
Biofilms     Full-text available via subscription   (Followers: 1)
Biogeosciences (BG)     Open Access   (Followers: 10)
Biogeosciences Discussions (BGD)     Open Access   (Followers: 2)
Bioinformatics     Hybrid Journal   (Followers: 294)
Bioinformatics and Biology Insights     Open Access   (Followers: 11)
Bioinspiration & Biomimetics     Hybrid Journal   (Followers: 7)
Biointerphases     Open Access   (Followers: 1)
Biojournal of Science and Technology     Open Access  
Biologia     Hybrid Journal  
Biologia on-line : Revista de divulgació de la Facultat de Biologia     Open Access  
Biological Bulletin     Partially Free   (Followers: 6)
Biological Control     Hybrid Journal   (Followers: 4)
Biological Invasions     Hybrid Journal   (Followers: 19)
Biological Journal of the Linnean Society     Hybrid Journal   (Followers: 18)
Biological Letters     Open Access   (Followers: 5)
Biological Procedures Online     Open Access  
Biological Psychiatry     Hybrid Journal   (Followers: 46)
Biological Psychology     Hybrid Journal   (Followers: 7)
Biological Research     Open Access  
Biological Rhythm Research     Hybrid Journal   (Followers: 2)
Biological Theory     Hybrid Journal   (Followers: 2)
Biological Trace Element Research     Hybrid Journal  

        1 2 3 4 5 6 7 8 | Last

Journal Cover
Archives of Microbiology
Journal Prestige (SJR): 0.644
Citation Impact (citeScore): 2
Number of Followers: 8  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1432-072X - ISSN (Online) 0302-8933
Published by Springer-Verlag Homepage  [2351 journals]
  • New insights into the metabolic potential of the phototrophic purple
           bacterium Rhodopila globiformis DSM 161 T from its draft genome sequence
           and evidence for a vanadium-dependent nitrogenase
    • Authors: Johannes F. Imhoff; Tanja Rahn; Sven Künzel; Sven C. Neulinger
      Pages: 847 - 857
      Abstract: Rhodopila globiformis: is the most acidophilic anaerobic anoxygenic phototrophic purple bacterium and was isolated from a warm acidic sulfur spring in Yellowstone Park. Its genome is larger than genomes of other phototrophic purple bacteria, containing 7248 Mb with a G + C content of 67.1% and 6749 protein coding and 53 RNA genes. The genome revealed some previously unknown properties such as the presence of two sets of structural genes pufLMC for the photosynthetic reaction center genes and two types of nitrogenases (Mo-Fe and V-Fe nitrogenase), capabilities of autotrophic carbon dioxide fixation and denitrification using nitrite. Rhodopila globiformis assimilates sulfate and utilizes the C1 carbon substrates CO and methanol and a number of organic compounds, in particular, sugars and aromatic compounds. It is among the few purple bacteria containing a large number of pyrroloquinoline quinone-dependent dehydrogenases. It has extended capacities to resist stress by heavy metals, demonstrates different resistance mechanisms to antibiotics, and employs several toxin/antitoxin systems.
      PubDate: 2018-08-01
      DOI: 10.1007/s00203-018-1489-z
      Issue No: Vol. 200, No. 6 (2018)
       
  • Genotyping of Candidatus Syngnamydia salmonis ( chlamydiales; Simkaniaceae
           ) co-cultured in Paramoeba perurans (amoebozoa; Paramoebidae)
    • Authors: Are Nylund; Dario Pistone; Christiane Trösse; Steffen Blindheim; Linda Andersen; Heidrun Plarre
      Pages: 859 - 867
      Abstract: Candidatus Syngnamydia salmonis (Chlamydiales, Simkaniaceae) was described as an epitheliocystis-causing bacterium from the gills of Atlantic salmon (Salmo salar) in Norway. A bacterium showing 99.2% 16S rRNA identity to Cand. S. salmonis is able to multiply in Paramoeba perurans and based on the classification criteria this bacterium could represent the same species as Cand. S. salmonis. Sequencing the genome of the cultured bacterium has made it possible to fulfill the minimal standards for genetic characterization of species within the order Chlamydiales. The complete rRNA genes, the amino acid sequences of SucA, PepF, Adk, HemL, DnaA, FtsK and FabI, are presented in addition to the morphology of the Chlamydia-like morphs in the cytoplasm of P. perurans.
      PubDate: 2018-08-01
      DOI: 10.1007/s00203-018-1488-0
      Issue No: Vol. 200, No. 6 (2018)
       
  • Taxonomic structure and function of seed-inhabiting bacterial microbiota
           from common reed ( Phragmites australis ) and narrowleaf cattail ( Typha
           angustifolia L.)
    • Authors: Ting Gao; Xian-Yang Shi
      Pages: 869 - 876
      Abstract: The present study investigated the endophytic bacterial communities in the seeds of mature, natural common reed (Phragmites australis) and narrowleaf cattail (Typha angustifolia L.). Additionally, seed endophytic bacterial communities were compared with rhizospheric and root endophytic bacterial communities using Illumina-based sequencing. Seed endophytic bacterial communities were dominated by Proteobacteria (reed, 41.24%; cattail, 45.51%), followed by Bacteroidetes (reed, 12.01%; cattail, 10.41%), Planctomycetes (reed, 10.36%; cattail, 9.09%), Chloroflexi (reed, 8.72%; cattail, 6.45%), Thermotogae (reed, 5.43%; cattail, 6.11%), Tenericutes (reed, 3.63%; cattail, 3.97%) and Spirochaetes (reed, 3.32%; cattail, 3.90%). The dominant genera were Desulfobacter (reed, 8.02%; cattail, 8.96%), Geobacter (reed, 2.74%; cattail, 2.81%), Thiobacillus (reed, 2.71%; cattail, 2.41%), Sulfurimonas (reed, 2.47%; cattail, 2.31%), Methyloversatilis (reed, 2.29%; cattail, 2.05%) and Dechloromonas (reed, 1.13%; cattail, 1.48%). Obvious distinctions were observed among the respective rhizospheric, root endophytic and seed endophytic bacterial communities. Principal coordinate analysis with weighted UniFrac distance and the heat map analysis demonstrated that the seed endophytic bacterial communities were distinct assemblages rather than a subgroup of rhizobacterial communities or root endophytic bacterial communities. These results provide new information regarding endophytic bacteria associated with seeds of wetland plants and demonstrate a variety of genera that have a strong potential to enhance phytoremediation in the wetland ecosystem.
      PubDate: 2018-08-01
      DOI: 10.1007/s00203-018-1493-3
      Issue No: Vol. 200, No. 6 (2018)
       
  • Paucibacter aquatile sp. nov. isolated from freshwater of the Nakdong
           River, Republic of Korea
    • Authors: Young Ho Nam; Ahyoung Choi; Jung Moon Hwang; Kyung June Yim; Jee-Hwan Kim; Gang-Guk Choi; Eu Jin Chung
      Pages: 877 - 882
      Abstract: A Gram-negative, aerobic, motile, and rod-shaped bacterial strain designated CR182T was isolated from freshwater of the Nakdong River, Republic of Korea. Optimal growth conditions for this novel strain were found to be: 25–30 °C, pH 6.5–8.5, and 3% (w/v) NaCl. Phylogenetic analysis based on 16S rRNA gene sequence indicates that the strain CR182T belongs to type strains of genus Paucibacter. Strain CR182T showed 98.0% 16S rRNA gene sequence similarity with Paucibacter oligotrophus CHU3T and formed a robust phylogenetic clade with this species. The average nucleotide identity value between strain CR182T and P. oligotrophus CHU3T was 78.4% and the genome-to-genome distance was 22.2% on average. The genomic DNA G+C content calculated from the genome sequence was 66.3 mol%. Predominant cellular fatty acids of strain CR182T were summed feature 3 (C16:1 ω7c and/or C16:1 ω6c) (31.2%) and C16:0 (16.0%). Its major respiratory quinine was ubiquinone Q-8. Its polar lipids consisted of diphosphatidylglycerol, phosphatidylethanolamine, and two unidentified phospholipids. Its genomic DNA G+C content was 66.3%. Based on data obtained from this polyphasic taxonomic study, strain CR182T represents a novel species belonging to genus Paucibacter, for which a name of P. aquatile sp. nov. is proposed. The type strain is CR182T (= KCCM 90284T = NBRC 113032T).
      PubDate: 2018-08-01
      DOI: 10.1007/s00203-018-1494-2
      Issue No: Vol. 200, No. 6 (2018)
       
  • Mechanism of arsenic resistance in endophytic bacteria isolated from
           endemic plant of mine tailings and their arsenophore production
    • Authors: Brenda Román-Ponce; Juan Ramos-Garza; Ivan Arroyo-Herrera; Jessica Maldonado-Hernández; Yanelly Bahena-Osorio; María Soledad Vásquez-Murrieta; En Tao Wang
      Pages: 883 - 895
      Abstract: Arsenic contamination is an important environmental problem around the world since its high toxicity, and bacteria resist to this element serve as valuable resource for its bioremediation. Aiming at searching the arsenic-resistant bacteria and determining their resistant mechanism, a total of 27 strains isolated from roots of Prosopis laevigata and Spharealcea angustifolia grown in a heavy metal-contaminated region in Mexico were investigated. The minimum inhibitory concentration (MIC) and transformation abilities of arsenate (As5+) and arsenite (As3+), arsenophore synthesis, arsenate uptake, and cytoplasmatic arsenate reductase (arsC), and arsenite transporter (arsB) genes were studied for these strains. Based on these results and the 16S rDNA sequence analysis, these isolates were identified as arsenic-resistant endophytic bacteria (AREB) belonging to the genera Arthrobacter, Bacillus, Brevibacterium, Kocuria, Microbacterium, Micrococcus, Pseudomonas, and Staphylococcus. They could tolerate high concentrations of arsenic with MIC from 20 to > 100 mM for As5+ and 10–20 mM for As3+. Eleven isolates presented dual abilities of As5+ reduction and As3+ oxidation. As the most effective strains, Micrococcus luteus NE2E1 reduced 94% of the As5+ and Pseudomonas zhaodongensis NM2E7 oxidized 46% of As3+ under aerobic condition. About 70 and 44% of the test strains produced arsenophores to chelate As5+ and As3+, respectively. The AREB may absorb arsenate via the same receptor of phosphate uptake or via other way in some case. The cytoplasmic arsenate reductase and alternative arsenate reduction pathways exist in these AREB. Therefore, these AREB could be candidates for the bioremediation process.
      PubDate: 2018-08-01
      DOI: 10.1007/s00203-018-1495-1
      Issue No: Vol. 200, No. 6 (2018)
       
  • IcmF and DotU are required for the virulence of Acidovorax oryzae strain
           RS-1
    • Authors: Bin Li; Xiaoxuan Wang; Jie Chen; He Liu; Khattak Arif Ali; Yanli Wang; Wen Qiu; Guochang Sun
      Pages: 897 - 910
      Abstract: Acidovorax oryzae (Ao) cause bacterial brown stripe in rice that result in great economic loss. However, the pathogenic mechanism of this rice bacterial pathogen still remains unclear. Interestingly, transcriptomic and proteomic analysis of in vivo infection indicate that the pathogenicity of Ao strain RS-1 may be associated with the type six secretion system (T6SS), which was identified by in silico comparative genomic analysis in our previous studies. This makes it necessary to further examine the role of each core component of T6SS in the pathogenicity of Ao strain RS-1 to rice plants. Results from this study highlight the mutual interaction between IcmF and DotU, which was determined by bacterial two-hybrid and bimolecular fluorescence complementation assays. Furthermore, a difference was observed in bacterial pathogenicity, biofilm formation, secreted proteins identified by LC–MS/MS analysis and the expression of T6SS other genes examined by quantitative real-time PCR between the wild-type and both single-gene knockout mutants, which were respectively constructed based on the insertional mutagenesis of Ao strain RS-1 in this study. Overall, our results clearly revealed the importance of T6SS icmF and dotU in pathogenicity of Ao strain RS-1 to rice plants.
      PubDate: 2018-08-01
      DOI: 10.1007/s00203-018-1497-z
      Issue No: Vol. 200, No. 6 (2018)
       
  • Molecular identification of fungal isolates and hatching success of green
           turtle ( Chelonia mydas ) nests
    • Authors: Esra Deniz Candan
      Pages: 911 - 919
      Abstract: The aim of this study is to investigate the fungal diversity of green turtle nests and to examine phylogenetic relationships among these isolates. During the nesting season, samples of intra-nest sand and failed eggs were collected from 25% of the surviving nests in Sugözü Beaches, which are amongst the most important nesting beaches for endangered green turtles in the Mediterranean. Twenty-three fungi were identified by molecular techniques. Fungal isolates belonged to genera Aspergillus, Emericella, Rhizopus, Actinomucor and Apophysomyces with two undescribed species. Aspergillus variecolor, Aspergillus quadrilinieatus, Aspergillus tubingensis, Rhizopus oryzae, Actinomucor elegans and Apophysomyces variabilis were firstly detected in all sea turtle nests within this study. Our results demonstrate that 36.4% of the nests had fungal contamination. Also hatching success of the nests contaminated by fungi were significantly lower than the uncontaminated nests (P = 0.029). Also, this may represent a threat to marine turtles and a risk for the health of conservation workers. This study is the first molecular phylogenetic study associated with sea turtle nests in the eastern Mediterranean coast and contributes to the wider body of literature on fungal invasion of sea turtle nests with firstly isolated species. These findings are important for improving potential conservation measures for the nest sites.
      PubDate: 2018-08-01
      DOI: 10.1007/s00203-018-1496-0
      Issue No: Vol. 200, No. 6 (2018)
       
  • The growth-promoting effects of endophytic bacteria on Phyllostachys
           edulis
    • Authors: Zong-Sheng Yuan; Fang Liu; Bao-Gui Xie; Guo-Fang Zhang
      Pages: 921 - 927
      Abstract: The research results of the growth-promoting effects of endophytic bacteria on Phyllostachys edulis indicated that the growth-promoting endophytic bacteria could improve photosynthesis in P. edulis leaves. The photosynthetic rate, transpiration rate, and the stomatal conductance in P. edulis treated with endophytic bacteria were all higher than in the control group. Endophytic bacteria could also increase the chlorophyll content and the protective enzyme activities in P. edulis, improving their reactions to the adverse environmental conditions. Through injection treatments with growth-promoting endophytic bacteria, the catalase, superoxide dismutase (SOD), peroxidase activity, soluble protein content, and soluble sugar content in P. edulis were all higher than in the control group, except for the malondialdehyde content, which was lower than in the control group.
      PubDate: 2018-08-01
      DOI: 10.1007/s00203-018-1500-8
      Issue No: Vol. 200, No. 6 (2018)
       
  • Antibacterial activity of monoacetylated alkyl gallates against
           Xanthomonas citri subsp. citri
    • Authors: Abigail Savietto; Carlos Roberto Polaquini; Malgorzata Kopacz; Dirk-Jan Scheffers; Beatriz Carvalho Marques; Luís Octavio Regasini; Henrique Ferreira
      Pages: 929 - 937
      Abstract: Asiatic citrus canker (ACC) is an incurable disease of citrus plants caused by the Gram-negative bacterium Xanthomonas citri subsp. citri (X. citri). It affects all the commercially important citrus varieties in the major orange producing areas around the world. Control of the pathogen requires recurrent sprays of copper formulations that accumulate in soil and water reservoirs. Here, we describe the improvement of the alkyl gallates, which are potent anti-X. citri compounds, intended to be used as alternatives to copper in the control of ACC. Acetylation of alkyl gallates increased their lipophilicity, which resulted in potentiation of the antibacterial activity. X. citri exposed to the acetylated compounds exhibited increased cell length that is consistent with the disruption of the cell division apparatus. Finally, we show that inhibition of cell division is an indirect effect that seemed to be caused by membrane permeabilization, which is apparently the primary target of the acetylated alkyl gallates.
      PubDate: 2018-08-01
      DOI: 10.1007/s00203-018-1502-6
      Issue No: Vol. 200, No. 6 (2018)
       
  • Agromyces mangrovi sp. nov., a novel actinobacterium isolated from the
           rhizosphere of a mangrove
    • Authors: Moriyuki Hamada; Satomi Saitou; Tomohiko Tamura
      Pages: 939 - 943
      Abstract: A novel actinobacterium, designated HIr16-25T, was isolated from the rhizosphere soil of a mangrove growing on Iriomote Island in Japan. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain HIr16-25T fell within the cluster of the members of the genus Agromyces and the highest sequence similarity value was observed with Agromyces rhizospherae IFO 16236T (98.6%). Strain HIr16-25T possessed l-2,4-diaminobutyric acid as a diagnostic diamino acid of the peptidoglycan, and MK-12 and MK-11 as the predominant menaquinones. The major fatty acids were identified as iso-C16:0, anteiso-C15:0 and anteiso-C17:0 and the principal polar lipids were phosphatidylglycerol and one glycolipid. These chemotaxonomic features matched well those described for the members of the genus Agromyces. Meanwhile, the result of DNA–DNA hybridization and the presence of differential phenotypic characteristics between strain HIr16-25T and the type strain of A. rhizospherae indicated that strain HIr16-25T be classified as a novel species of the genus Agromyces. Therefore, we propose strain HIr16-25T to represent a novel species of the genus Agromyces, with the name Agromyces mangrovi sp. nov. The type strain is HIr16-25T (= NBRC 112812T = TBRC 7760T).
      PubDate: 2018-08-01
      DOI: 10.1007/s00203-018-1504-4
      Issue No: Vol. 200, No. 6 (2018)
       
  • The diversity of sulfate-reducing bacteria in the seven bioreactors
    • Authors: Ivan Kushkevych; Jozef Kováč; Monika Vítězová; Tomáš Vítěz; Milan Bartoš
      Pages: 945 - 950
      Abstract: Anaerobic technology has a wide scope of application in different areas such as manufacturing, food industry, and agriculture. Nowadays, it is mainly used to produce electrical and thermal energy from crop processing, solid waste treatment or wastewater treatment. More intensively, trend nowadays is usage of this technology biodegradable and biomass waste processing and biomethane or hydrogen production. In this paper, the diversities of sulfate-reducing bacteria (SRB) under different imputed raw material to the bioreactors were characterized. These diversities at the beginning of sampling and after cultivation were compared. Desulfovibrio, Desulfobulbus, and Desulfomicrobium genus as dominant among sulfate reducers in the bioreactors were detected. The Desulfobulbus species were dominant among other SRB genera before cultivation, but these bacteria were detected only in three out of the seven bioreactors after cultivation dominant.
      PubDate: 2018-08-01
      DOI: 10.1007/s00203-018-1510-6
      Issue No: Vol. 200, No. 6 (2018)
       
  • Antibacterial potential of secondary metabolites produced by Aspergillus
           sp., an endophyte of Mitrephora wangii
    • Authors: Sakon Monggoot; Tanakrit Pichaitam; Chutima Tanapichatsakul; Patcharee Pripdeevech
      Pages: 951 - 959
      Abstract: Mitrephora wangii, an ethnomedicinal plant, has been used as a natural antibiotic and immunity booster in Thailand. A total of 22 fungi were isolated from M. wangii flowers. The fungal isolates were categorized into six genera including Agrocybe, Aspergillus, Colletotrichum, Nigrospora, Puccinia and Ustilago. Most extracts exhibited antibacterial activity against at least one of the test bacteria. Aspergillus sp. MFLUCC16-0845 was identified as the most bioactive fungus. Chemical composition of Aspergillus sp. MFLUCC16-0845 investigated using gas chromatography–mass spectrometry indicated that the major antibacterial compound was β-thujaplicin. Moreover, the newly isolated Aspergillus sp. MFLUCC16-0845 could be exploited as a potential source of bioactive compounds and plant defense activators. In addition, it is the first time that strain of Aspergillus sp. isolated and cultured from M. wangii flowers could produce β-thujaplicin at high yield with strong antimicrobial spectrum, which may lead to wide utilization in producing cosmetics and clinical products.
      PubDate: 2018-08-01
      DOI: 10.1007/s00203-018-1511-5
      Issue No: Vol. 200, No. 6 (2018)
       
  • Polyunsaturated fatty acids from Phyllocaulis boraceiensis mucus block the
           replication of influenza virus
    • Authors: Ana Rita de Toledo-Piza; Maria Isabel de Oliveira; Giuseppina Negri; Ronaldo Zucatelli Mendonça; Cristina Adelaide Figueiredo
      Pages: 961 - 970
      Abstract: Influenza viruses cause worldwide outbreaks and pandemics in humans and animals every year with considerable morbidity and mortality. The molecular diversity of secondary metabolites extracted from mollusks is a good alternative for the discovery of novel bioactive compounds with unique structures and diverse biological activities. Phyllocaulis boraceiensis is a hermaphroditic slug that exudes mucus, in which was detected hydroxy polyunsaturated fatty acids that exhibited potent antiviral activity against measles virus. The objective of this study was to evaluate this property against Influenza viruses. Cell viability and toxicity of the mucus were evaluated on Madin–Darby canine kidney (MDCK) cells by MTT assay. Antiviral activity from mucus against influenza viruses was carried out by determination of the virus infection dose and by immunofluorescence assays. The crude mucus and its fractions exhibited low cytotoxicity on MDCK cells. A significant inhibition of viral replication, reduced by the order of eight times, was observed in influenza-induced cytopathic effect. In immunofluorescence assay was observed a decrease of more than 80% of the viral load on infected MDCK cell treated with mucus and its fractions. The viral glycoproteins hemagglutinin and neuraminidase located on the surface of the virus are crucial for the replications and infectivity of the influenza virus. Some authors demonstrated that lipids, such as, polyunsaturated fatty acids exhibited multiple roles in antiviral innate and adaptive responses, control of inflammation, and in the development of antiviral therapeutics. As corroborated by other studies, hydroxy polyunsaturated fatty acids interfered with the binding of influenza virus on host cell receptor and reduced viral titers. The results obtained indicated that polyunsaturated fatty acids from P. boraceiensis crude mucus and fractions 39 exerted antiviral activity against influenza virus.
      PubDate: 2018-08-01
      DOI: 10.1007/s00203-018-1507-1
      Issue No: Vol. 200, No. 6 (2018)
       
  • Dissolved oxygen-mediated enrichment of quorum-sensing phenomenon in the
           bacterial community to combat oxidative stress
    • Authors: Hitesh Tikariha; Anshuman A. Khardenavis; Hemant J. Purohit
      Abstract: Microbial community with their plasticity follows a course of changes that allow adaptation and survival in a particular habitat. In this study perturbations in microbial flora dwelling in two reactors with phenol as a carbon source under the limiting nitrogen and phosphorus conditions were monitored for 3 months with alterations of dissolved oxygen (DO). With the time, the shift in diversity and abundance of bacteria were observed with simultaneous increase in biofilm-forming bacteria like Pseudomonas, Escherichia, etc. Functional level screening revealed that the abundance of core metabolic genes were not much altered, however, the regulated level of increase in quorum sensing genes (acyl-homoserine lactone), biofilm-forming genes, catalase and ferroxidase enzymes at high DO suggest the survival mechanism of the community. This study sheds light on survival route followed by the bacterial community with abiotic stress, such as an increase in DO.
      PubDate: 2018-07-11
      DOI: 10.1007/s00203-018-1551-x
       
  • Aliibacillus thermotolerans gen. nov., sp. nov.: a thermophilic and
           heterotrophic ammonia-oxidizing bacterium from compost
    • Authors: Jie Xu; Xiu-Hong Xu; Meng-Qi Men; Qing-Xin Meng; Ben-Shu Xu
      Abstract: A novel moderately thermophilic and heterotrophic ammonia-oxidizing bacterium, designated strain BM62T, was isolated from compost in the thermophilic stage in Harbin, China. Phylogenetic analysis based on the 16S rRNA gene indicated that strain BM62T belongs to the family Bacillaceae within the class Bacilli and was most closely related to Alteribacillus iranensis X5BT (only 94.6% sequence similarity). Cells of strain BM62T were Gram-positive, rod-shaped, motile by periflagella, catalase-positive and oxidase-negative. Growth of strain BM62T was observed at salinities of 0–4% (optimum 2–3%), temperatures of 35–65 °C (optimum 50 °C) and pH values of 5–9 (optimum pH 7). The major cellular fatty acid was iso-C16:0, and the predominant ubiquinone was MK-7. The peptidoglycan type is A1γ, and meso-diaminopimelic acid was the diagnostic diamino acid. The major polar lipids were diphosphatidylglycerol, phospholipid and phosphatidylglycerol. The G + C content of its genomic DNA was 36.5 mol%. Data from this polyphasic taxonomy study suggested that strain BM62T should be classified as the type strain of the type species of a new genus within the family Bacillaceae for which the name Aliibacillus thermotolerans gen. nov., sp. nov. is proposed. The type strain of the species Aliibacillus thermotolerans sp. nov. is BM62T (= DSM 101851T = CGMCC 1.15790T). The respective DPD Taxon Number is GA00057.
      PubDate: 2018-07-04
      DOI: 10.1007/s00203-018-1550-y
       
  • Buttiauxella chrysanthemi sp. nov., isolated from a chrysanthemum
           plantation in Brazil
    • Authors: João Pedro Rueda Furlan; Vânia Santos Braz; Jonas Augusto Rizzato Paschoal; Eliana Guedes Stehling
      Abstract: A novel Gram-negative, rod-shaped, non-motile bacterium, designated C1BT was isolated from a soil sample of a chrysanthemum plantation in Campinas, Brazil. Strain C1BT formed white colonies on BHI medium, it produces acid from d-lactose, d-mannose, d-arabinose, but does not produce from d-adonitol, m-inositol, d-melibiose, d-raffinose and d-sorbitol and it is negative for lysine and ornithine decarboxylase, phenylalanine deaminase, and citrate. Phylogenetic analysis based on 16S rRNA and rpoB genes sequences showed that strain C1BT has a similarity of 98.2 and 96.8% with different species of Buttiauxella genus. Major fatty acids were C16:0, summed features 4 (C16:1 ω7c and iso-C15:0 2OH), summed features 7 (C18:1 ω7c, C18:1 ω9t, and/or C18:1 ω12t), C17:0 cyclo, summed features 3 (iso-C16:1 I and C14:0 3OH) and C14:0. The mole percent of G+C was 49.6 mol%. Based on these results, a new species Buttiauxella chrysanthemi is proposed. The type strain is C1BT (= CPQBA 1120/15T = CMRVSP5791T).
      PubDate: 2018-07-04
      DOI: 10.1007/s00203-018-1548-5
       
  • Phylogenetic diversity and metabolic potential of microbiome of natural
           healing clay from Chamliyal (J&K)
    • Authors: Sakshi Sharma; Simmi Grewal; Jyoti Vakhlu
      Abstract: Clay therapy for skin disease treatment is an ancient practice popular worldwide as a cheap alternative to pharmaceutical products. Effectiveness of clay against skin problems has been linked to its mineral composition and to microbial activity. The clay–water paste of a holy shrine Chamliyal in the Jammu region of J&K, India is used as an ointment to treat different skin disorders particularly psoriasis. Using the 16 SrDNA amplicon pyrosequencing and whole-metagenome direct shotgun Illumina sequencing, microbial phylogeny and potential metabolic functions were catalogued for Chamliyal’s clay. Microbial diversity profile of the Chamliyal’s clay is similar to other medicinal clays, particularly Dead Sea; there is some uniqueness as well. Although Proteobacteria, Actinomycetes and Firmicutes are common inhabitants of all the clay types, sulphur- and iron-reducing bacteria like Deferribacterales are particular to clays used for skin healing. In the present study it is proposed that healing properties of clay may be due to the microbes and microbial genes associated with metabolism of minerals like iron and sulphur, that lead to mineral acquisition in the Chamliyal’s clay.
      PubDate: 2018-07-04
      DOI: 10.1007/s00203-018-1549-4
       
  • The program of antiviral agents inhibits virus infection
    • Abstract: Virus infections are the root cause of epidemics in the world. Vaccines and antiviral agents have been the two important methods to control viral diseases; in recent times, RNA-mediated therapeutics and prevention have received much attention. In this review, we provide an overview of the current information regarding the use of vaccines, antiviral agents, and RNA-mediated methods in controlling or preventing viral infections. We stress specifically on the potential of existing RNA-mediated methods in clinical applications.
      PubDate: 2018-05-30
      DOI: 10.1007/s00203-018-1525-z
       
  • Effect of global transcriptional regulators on kinetic behavior of
           Escherichia coli under anaerobic fermentation conditions
    • Authors: Manika Kargeti; K. V. Venkatesh
      Abstract: The phenotype of Escherichia coli is governed by global transcriptional regulators under variable environmental conditions. Fnr, ArcA, IhfA-B, Crp, and Fis are amongst the major global transcription regulators that change their activity across the range of aeration, hence forming the core transcriptional network responsible for survival under changing aeration conditions. Effect of deletion of these global transcription factors on the kinetics of cell growth and mixed acid production under anaerobic fermentation conditions has not been characterized. To quantify the kinetic parameters in the absence of global transcription factors, experiments were performed using single deletion mutants of the above-mentioned global transcription regulators. The absence of global transcription regulators resulted in a relatively higher glucose uptake rate than that required for the observed growth rate. This further resulted in a higher yield of mixed acids per unit biomass in mutants as compared to the parent strain (E. coli BW25113). Thus, the increased channeling of carbon towards mixed acid secretion resulted in a lower growth rate in the mutants.
      PubDate: 2018-05-10
      DOI: 10.1007/s00203-018-1518-y
       
  • Molecular insights into the activity and mechanism of cyanide hydratase
           enzyme associated with cyanide biodegradation by Serratia marcescens
    • Authors: Madhulika Kushwaha; Virender Kumar; Rishi Mahajan; Tek Chand Bhalla; Subhankar Chatterjee; Yusuf Akhter
      Abstract: The present study provides molecular insights into the activity and mechanism of cyanide hydratase enzyme associated with degradation of cyanide compounds, using Serratia marcescens RL2b as a model organism. Resting cells harvested after 20 h achieved complete degradation of 12 mmol l− 1 cyanide in approximately 10 h. High-performance liquid chromatography analysis of reaction samples revealed formation of formamide as the only end product, which confirmed the presence of cyanide hydratase activity in S. marcescens RL2b. Comparative structural analysis with the other nitrilase family proteins, which was carried out using a sequence of cyanide hydratase from a phylogenetically related strain S. marcescens WW4, also revealed subtle but significant differences in amino acid residues of the substrate-binding pocket and catalytic triad (Cys-Lys-Glu).
      PubDate: 2018-05-09
      DOI: 10.1007/s00203-018-1524-0
       
 
 
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