Subjects -> BIOLOGY (Total: 3419 journals)
    - BIOCHEMISTRY (265 journals)
    - BIOENGINEERING (141 journals)
    - BIOLOGY (1631 journals)
    - BIOPHYSICS (49 journals)
    - BIOTECHNOLOGY (266 journals)
    - BOTANY (249 journals)
    - CYTOLOGY AND HISTOLOGY (31 journals)
    - ENTOMOLOGY (75 journals)
    - GENETICS (171 journals)
    - MICROBIOLOGY (283 journals)
    - MICROSCOPY (12 journals)
    - ORNITHOLOGY (28 journals)
    - PHYSIOLOGY (72 journals)
    - ZOOLOGY (146 journals)

BIOLOGY (1631 journals)                  1 2 3 4 5 6 7 8 | Last

Showing 1 - 200 of 1720 Journals sorted alphabetically
AAPS Journal     Hybrid Journal   (Followers: 29)
Achievements in the Life Sciences     Open Access   (Followers: 8)
ACS Pharmacology & Translational Science     Hybrid Journal   (Followers: 2)
ACS Synthetic Biology     Hybrid Journal   (Followers: 31)
Acta Biologica Colombiana     Open Access   (Followers: 7)
Acta Biologica Hungarica     Full-text available via subscription   (Followers: 5)
Acta Biologica Sibirica     Open Access   (Followers: 2)
Acta Biologica Turcica     Open Access   (Followers: 1)
Acta Biologica Venezuelica     Open Access  
Acta Biomaterialia     Hybrid Journal   (Followers: 30)
Acta Biotheoretica     Hybrid Journal   (Followers: 3)
Acta Chiropterologica     Full-text available via subscription   (Followers: 6)
acta ethologica     Hybrid Journal   (Followers: 4)
Acta Fytotechnica et Zootechnica     Open Access   (Followers: 1)
Acta Limnologica Brasiliensia     Open Access   (Followers: 4)
Acta Médica Costarricense     Open Access   (Followers: 2)
Acta Musei Silesiae, Scientiae Naturales     Open Access   (Followers: 1)
Acta Neurobiologiae Experimentalis     Open Access  
Acta Parasitologica     Hybrid Journal   (Followers: 12)
Acta Scientiae Biological Research     Open Access   (Followers: 1)
Acta Scientiarum. Biological Sciences     Open Access   (Followers: 2)
Acta Scientifica Naturalis     Open Access   (Followers: 3)
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis     Open Access   (Followers: 1)
Actualidades Biológicas     Open Access   (Followers: 1)
Advanced Biosystems     Hybrid Journal  
Advanced Health Care Technologies     Open Access   (Followers: 10)
Advanced Journal of Graduate Research     Open Access   (Followers: 1)
Advanced Nonlinear Studies     Hybrid Journal  
Advanced Quantum Technologies     Hybrid Journal  
Advanced Studies in Biology     Open Access   (Followers: 1)
Advances in Antiviral Drug Design     Full-text available via subscription   (Followers: 2)
Advances in Bioinformatics     Open Access   (Followers: 20)
Advances in Biological Regulation     Hybrid Journal   (Followers: 4)
Advances in Biology     Open Access   (Followers: 12)
Advances in Cell Biology/ Medical Journal of Cell Biology     Open Access   (Followers: 30)
Advances in Cellular and Molecular Biology of Membranes and Organelles     Full-text available via subscription   (Followers: 14)
Advances in Developmental Biology     Full-text available via subscription   (Followers: 14)
Advances in DNA Sequence-Specific Agents     Full-text available via subscription   (Followers: 7)
Advances in Ecological Research     Full-text available via subscription   (Followers: 44)
Advances in Environmental Sciences - International Journal of the Bioflux Society     Open Access   (Followers: 18)
Advances in Enzyme Research     Open Access   (Followers: 11)
Advances in Experimental Biology     Full-text available via subscription   (Followers: 9)
Advances in Genome Biology     Full-text available via subscription   (Followers: 11)
Advances in High Energy Physics     Open Access   (Followers: 22)
Advances in Human Biology     Open Access   (Followers: 5)
Advances in Life Science and Technology     Open Access   (Followers: 20)
Advances in Life Sciences     Open Access   (Followers: 7)
Advances in Marine Biology     Full-text available via subscription   (Followers: 21)
Advances in Molecular and Cell Biology     Full-text available via subscription   (Followers: 26)
Advances in Organ Biology     Full-text available via subscription   (Followers: 2)
Advances in Planar Lipid Bilayers and Liposomes     Full-text available via subscription   (Followers: 3)
Advances in Space Biology and Medicine     Full-text available via subscription   (Followers: 7)
Advances in Structural Biology     Full-text available via subscription   (Followers: 6)
Advances in Tropical Biodiversity and Environmental Sciences     Open Access   (Followers: 3)
Advances in Virus Research     Full-text available via subscription   (Followers: 6)
African Journal of Range & Forage Science     Hybrid Journal   (Followers: 11)
AFRREV STECH : An International Journal of Science and Technology     Open Access   (Followers: 3)
Ageing Research Reviews     Hybrid Journal   (Followers: 12)
Aging Cell     Open Access   (Followers: 25)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat     Open Access  
AJP Cell Physiology     Hybrid Journal   (Followers: 18)
AJP Endocrinology and Metabolism     Hybrid Journal   (Followers: 25)
AJP Lung Cellular and Molecular Physiology     Hybrid Journal   (Followers: 3)
Al-Kauniyah : Jurnal Biologi     Open Access  
Alasbimn Journal     Open Access   (Followers: 2)
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: 9)
American Journal of Bioethics     Hybrid Journal   (Followers: 16)
American Journal of Human Biology     Hybrid Journal   (Followers: 18)
American Journal of Medical and Biological Research     Open Access   (Followers: 10)
American Journal of Plant Sciences     Open Access   (Followers: 21)
American Journal of Primatology     Hybrid Journal   (Followers: 16)
American Malacological Bulletin     Full-text available via subscription   (Followers: 3)
American Naturalist     Full-text available via subscription   (Followers: 81)
Amphibia-Reptilia     Hybrid Journal   (Followers: 6)
Anadol University Journal of Science and Technology B : Theoritical Sciences     Open Access  
Anadolu University Journal of Science and Technology : C Life Sciences and Biotechnology     Open Access   (Followers: 2)
Anaerobe     Hybrid Journal   (Followers: 4)
Anales de Biología     Open Access  
Analytical Methods     Full-text available via subscription   (Followers: 13)
Anatomical Science International     Hybrid Journal   (Followers: 3)
Animal Cells and Systems     Hybrid Journal   (Followers: 5)
Animal Models and Experimental Medicine     Open Access  
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 Universitatis Mariae Curie-Sklodowska, sectio C – Biologia     Open Access   (Followers: 1)
Annals of Applied Biology     Hybrid Journal   (Followers: 8)
Annals of Biomedical Engineering     Hybrid Journal   (Followers: 19)
Annals of Human Biology     Hybrid Journal   (Followers: 6)
Annals of Science and Technology     Open Access  
Annual Research & Review in Biology     Open Access   (Followers: 2)
Annual Review of Biomedical Engineering     Full-text available via subscription   (Followers: 15)
Annual Review of Biophysics     Full-text available via subscription   (Followers: 26)
Annual Review of Cancer Biology     Full-text available via subscription   (Followers: 4)
Annual Review of Cell and Developmental Biology     Full-text available via subscription   (Followers: 42)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 15)
Annual Review of Genomics and Human Genetics     Full-text available via subscription   (Followers: 27)
Annual Review of Phytopathology     Full-text available via subscription   (Followers: 13)
Anthropological Review     Open Access   (Followers: 24)
Antibiotics     Open Access   (Followers: 9)
Antioxidants     Open Access   (Followers: 5)
Antioxidants & Redox Signaling     Hybrid Journal   (Followers: 9)
Antonie van Leeuwenhoek     Hybrid Journal   (Followers: 5)
Anzeiger für Schädlingskunde     Hybrid Journal   (Followers: 1)
Apidologie     Hybrid Journal   (Followers: 5)
Apmis     Hybrid Journal   (Followers: 1)
APOPTOSIS     Hybrid Journal   (Followers: 9)
Applied Biology     Open Access   (Followers: 2)
Applied Bionics and Biomechanics     Open Access   (Followers: 7)
Applied Vegetation Science     Full-text available via subscription   (Followers: 10)
Aquaculture Environment Interactions     Open Access   (Followers: 4)
Aquaculture International     Hybrid Journal   (Followers: 26)
Aquaculture Reports     Open Access   (Followers: 3)
Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society     Open Access   (Followers: 7)
Aquatic Biology     Open Access   (Followers: 8)
Aquatic Ecology     Hybrid Journal   (Followers: 38)
Aquatic Ecosystem Health & Management     Hybrid Journal   (Followers: 16)
Aquatic Science and Technology     Open Access   (Followers: 4)
Aquatic Toxicology     Hybrid Journal   (Followers: 23)
Archaea     Open Access   (Followers: 4)
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: 10)
Archives of Natural History     Hybrid Journal   (Followers: 8)
Archives of Oral Biology     Hybrid Journal   (Followers: 3)
Archives of Virology     Hybrid Journal   (Followers: 5)
Archivum Immunologiae et Therapiae Experimentalis     Hybrid Journal   (Followers: 2)
Arid Ecosystems     Hybrid Journal   (Followers: 3)
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)
Asian Bioethics Review     Full-text available via subscription   (Followers: 3)
Asian Journal of Biodiversity     Open Access   (Followers: 5)
Asian Journal of Biological Sciences     Open Access   (Followers: 3)
Asian Journal of Biology     Open Access   (Followers: 2)
Asian Journal of Biotechnology and Bioresource Technology     Open Access   (Followers: 1)
Asian Journal of Cell Biology     Open Access   (Followers: 6)
Asian Journal of Developmental Biology     Open Access   (Followers: 3)
Asian Journal of Medical and Biological Research     Open Access   (Followers: 5)
Asian Journal of Nematology     Open Access   (Followers: 4)
Asian Journal of Poultry Science     Open Access   (Followers: 5)
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: 8)
Autophagy     Hybrid Journal   (Followers: 4)
Avian Biology Research     Full-text available via subscription   (Followers: 6)
Avian Conservation and Ecology     Open Access   (Followers: 14)
Bacterial Empire     Open Access   (Followers: 1)
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  
Bio-Lectura     Open Access  
BIO-SITE : Biologi dan Sains Terapan     Open Access   (Followers: 1)
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: 17)
Biochimie     Hybrid Journal   (Followers: 6)
BioControl     Hybrid Journal   (Followers: 6)
Biocontrol Science and Technology     Hybrid Journal   (Followers: 8)
Biodemography and Social Biology     Hybrid Journal  
BIODIK : Jurnal Ilmiah Pendidikan Biologi     Open Access   (Followers: 1)
BioDiscovery     Open Access   (Followers: 2)
Biodiversidade e Conservação Marinha : Revista CEPSUL     Open Access  
Biodiversitas : Journal of Biological Diversity     Open Access  
Biodiversity Data Journal     Open Access   (Followers: 4)
Biodiversity Informatics     Open Access   (Followers: 1)
Biodiversity Information Science and Standards     Open Access   (Followers: 2)
Biodiversity: Research and Conservation     Open Access   (Followers: 27)
Bioedukasi : Jurnal Pendidikan Biologi FKIP UM Metro     Open Access  
Bioeksperimen : Jurnal Penelitian Biologi     Open Access  
Bioelectrochemistry     Hybrid Journal   (Followers: 2)
Bioelectromagnetics     Hybrid Journal   (Followers: 2)
Bioenergy Research     Hybrid Journal   (Followers: 4)
Bioengineering and Bioscience     Open Access   (Followers: 3)
BioEssays     Hybrid Journal   (Followers: 11)
Bioethics     Hybrid Journal   (Followers: 18)
BioéthiqueOnline     Open Access  
Biofabrication     Hybrid Journal   (Followers: 5)
Biofilms     Full-text available via subscription   (Followers: 2)
Biogeosciences (BG)     Open Access   (Followers: 12)
Biogeosciences Discussions (BGD)     Open Access   (Followers: 3)
Bioinformatics     Hybrid Journal   (Followers: 386)

        1 2 3 4 5 6 7 8 | Last

Similar Journals
Journal Cover
Antonie van Leeuwenhoek
Journal Prestige (SJR): 0.834
Citation Impact (citeScore): 2
Number of Followers: 5  
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1572-9699 - ISSN (Online) 0003-6072
Published by Springer-Verlag Homepage  [2570 journals]
  • Antagonistic yeasts from a salt-lake region in Egypt: identification of a
           taxonomically distinct group of phylloplane strains related to Sporisorium
    • Abstract: Abstract Non-pathogenic yeasts antagonising microorganisms that cause pre- and postharvest diseases of plants have been found in diverse habitats. Their practical applicability as biocontrol agents (BCAs) depends on the strength of their antagonistic activity and/or spectrum of sensitive target microorganisms. In this study, yeasts were isolated from the phylloplane and fruits of plants growing in the alkaline water lake region Wadi El-Natrun, Egypt, and tested for antifungal and antibacterial activity. All phylloplane yeast isolates belonged to the Basidiomycota and most of them could antagonise at least certain test organisms. One group of isolates showing strong antagonism against almost all fungi and yeasts appears to represent a hitherto undescribed species distantly related to the smut genus Sporisorium. This is the first report of antagonistic activity in Sporisorium. The isolates assigned to Naganishia and Papiliotrema were more effective against bacteria. The broadest range and intensity of antagonism was observed in the fruit-associated strains belonging to the ascomycetous species Wickerhamomyces subpelliculosus. The Wickerhamomyces strains are good broad-spectrum BCA candidates, the Sporisorium strains could be used as efficient antifungal BCAs, whereas the Papiliotrema isolate can be exploited as an antibacterial biocontrol agent.
      PubDate: 2019-04-01
  • Short-term impact of biochar amendments on eukaryotic communities in three
           different soils
    • Abstract: Abstract This study determined the loading impacts of wood-based biochar on the eukaryotic community in three different soils (brown sandy loam—BSL, red loam—RL and a black clay loam—BCL) using a pot trial conducted over 10 months. Soil analysis and 18S rRNA gene sequencing performed using the Illumina MiSeq platform was carried out to evaluate the changes in eukaryotic community composition in relation to different added amounts of biochar. It was found that biochar addition had a negligible effect on diversity parameters in the brown sandy loam Kurosol (BSL) and red loam Dermosol (RL) soils. There were, however, significant changes in eukaryotic community composition of these biochar amended soils. These changes were most discernible in the lighter (low clay content) BSL soil for the fungal communities (F = 3.0106, p = 0.0003) present and also when total eukaryotes were considered (F = 2.3907, p = 0.0002). In this respect Glomeromycota seem to be slightly promoted in the lighter BSL soils, which might be due to increased soil porosity and soil chemical fertility. Clay rich BCL soil community structure correlated to a greater degree with soil chemistry influenced by biochar addition. The results showed that soil microeukaryotes were affected by short term carbon amendment, though to a limited extent. The limited effect of biochar loading rates on the soil microbiology could be due to the short incubation period, the lack of added fertiliser nutrients, and also the inherent stability of the soil eukaryotic community. The data suggested the impacts that were observed however included important plant symbiotic organisms. The results also imply biochar applications at different loading levels have differential effects on soil microeurokaryotes in relation to soil properties in particular clay content.
      PubDate: 2019-04-01
  • A teleomorph of the ustilaginalean yeast Moesziomyces antarcticus on
           barnyardgrass in Japan provides bioresources that degrade biodegradable
    • Abstract: Abstract The basidiomycetous yeast Moesziomyces antarcticus (often cited as Pseudozyma antarctica), originally isolated from a sediment sample obtained from Lake Vanda in Antarctica, was asexually typified but closely related to the smut fungus Moesziomyces bullatus (Ustilaginales). We found a smut fungus on an ovary of barnyardgrass (Echinochloa crus-galli) in Japan, which had been identified as M. bullatus. The teliospores germinated and formed yeast-like colonies. Physiological and phylogenetic studies revealed that the characteristics of the yeast-like isolates coincided with those of “P. antarctica.” We thus recognised the smut fungus as the teleomorph of M. antarcticus, and then emended the description of M. antarcticus based on the holomorph. The identified fungus could degrade certain biodegradable plastics and produce mannosylerythritol lipids (MELs) in similar qualities as the “P. antarctica” type strain. This discovery provides a significant bioresource, as genetically diverse M. antarcticus isolates could be obtained from the smut fungus.
      PubDate: 2019-04-01
  • Cupriavidus lacunae sp. nov., isolated from pond-side soil
    • Abstract: Abstract A Gram-stain negative, strictly aerobic, mesophilic bacterial strain, designated strain S23T, was isolated from pond-side soil of an artificial pond in South Korea. Cells were observed to be peritrichously flagellated short rods showing positive oxidase and catalase activities. Growth of strain S23T was observed at 15–37 °C (optimum, 30 °C), pH 5.0–9.0 (optimum, pH 7.0–8.0) and 0–2% (w/v) NaCl (optimum, 0–0.5%). The major respiratory quinone was identified as ubiquinone-8 and the major fatty acids were identified as C16:0, cyclo-C17:0, summed feature 3 (C16:1ω7c and/or C16:1ω6c) and summed feature 8 (C18:1ω7c and/or C18:1ω6c). The G + C content of the genomic DNA was determined to be 65.1 mol%. Phosphatidylglycerol, phosphatidylethanolamine and an unidentified phospholipid were detected as the major polar lipids. Phylogenetic analyses based on 16S rRNA gene sequences showed that strain S23T formed a phyletic lineage with Cupriavidus necator N-1T within the genus Cupriavidus. Strain S23T is closely related to C. necator N-1T (99.2%), Cupriavidus basilensis DSM 11853T (98.8%), Cupriavidus alkaliphilus ASC-732T (98.8%) and Cupriavidus numazuensis TE26T (98.7%), based on 16S rRNA gene sequence similarities. However, the DNA–DNA relatedness values between strain S23T and the closely related type strains were less than 46%. On the basis of phenotypic, chemotaxonomic and molecular properties, strain S23T represents a novel species of the genus Cupriavidus, for which the name Cupriavidus lacunae sp. nov. is proposed. The type strain is S23T (KACC 19624T = JCM 32674T).
      PubDate: 2019-04-01
  • Mucilaginibacter xinganensis sp. nov., a phenanthrene-degrading bacterium
           isolated from wetland soil
    • Abstract: Abstract An aerobic, Gram-stain negative, rod-shaped and non-motile strain, BJC16-A31T, was isolated from the wetland soil sample taken from Daxing’anling, Heilongjiang, People’s Republic of China. Strain BJC16-A31T was found to be oxidase- and catalase-positive, and produced light orange colonies on modified R2A agar. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain BJC16-A31T is closely related to Mucilaginibacter gotjawali SA3-7T with 96.54% sequence similarity and it formed a separate lineage in the genus Mucilaginibacter. Strain BJC16-A31T contained menaquinone-7 (MK-7) as the predominant isoprenoid quinine. Anteiso-C15:0, C16:0 and anteiso-C15:0 were the major fatty acids. The major polar lipids were phosphatidylethanolamine, six unidentified polar lipid, two unidentified aminophospholipids and one unidentified aminolipid. The genome is composed of a circular 5,301,339 bp chromosome with average G + C percentage of 42.25%. The Average Nucleotide Identity (ANI) between strain BJC16-A31T and M. gotjawali SA3-7T was 77.51%. Combined phenotypic, chemotaxonomic, phylogenetic and genomic characteristics support the conclusion that strain BJC16-A31T represents a novel species of the genus Mucilaginibacter, for which the name Mucilaginibacter xinganensis sp. nov. is proposed. The type strain is BJC16-A31T (= CGMCC 1.12728T = NBRC 110384T).
      PubDate: 2019-04-01
  • Response of the microbial community associated with sweet potato ( Ipomoea
           batatas ) to Bacillus safensis and Bacillus velezensis strains
    • Abstract: Abstract Sweet potato is a subsistence crop cultivated worldwide. Although it is generally considered tolerant to different diseases, it is quite susceptible to the fungus Plenodomus destruens that causes foot-rot disease. Plant growth-promoting bacteria associated with sweet potato remain poorly studied, but some Bacillus strains may have potential as biological control agents. Here, we evaluate the persistence of two bacterial strains—Bacillus safensis T052-76 and Bacillus velezensis T149-19—in pot experiments and assess their impact on indigenous bacterial and fungal communities associated with sweet potato. Numbers of cells of both strains introduced into pots remained stable in the rhizosphere of sweet potato over the 180-day experiment. Denaturing gradient gel electrophoresis based on the rrs gene encoding bacterial 16S rRNA and the fungal ribosomal internal transcribed spacer region showed that bands corresponding to the introduced strains were not detected in plant endosphere. PERMANOVA and non-metric multidimensional scaling statistical analyses showed that: (1) strain T052-76 altered the structure of the indigenous bacterial community (rhizosphere and soil) more than strain T149-19; (2) T052-76 slightly altered the structure of the indigenous fungal community (rhizosphere and soil) and (3) strain T149-19 did not disturb the fungal community. Our results demonstrate the stability of both Bacillus strains in the sweet potato rhizosphere and, apart from the influence of B. safensis T052-76 on the bacterial community, their limited impact on the microbial community associated with this important crop plant.
      PubDate: 2019-04-01
  • Yeasts and bacteria associated with kocho, an Ethiopian fermented food
           produced from enset ( Ensete ventricosum )
    • Abstract: Abstract Enset (Ensete ventricosum) is the basis of the staple food consumed by about 20% of the Ethiopian population. Kocho is one of the food products generated from enset by spontaneous fermentation of decorticated and pulverized pseudostem and corm sections. We isolated culturable microbes associated with kocho from different stages of fermentation. Twelve yeast species, six lactic acid bacteria (LABs) species and eleven species of aerobic bacteria were identified by sequencing ITS/D1D2 regions of 26S rDNA of yeasts and 16S rDNA of bacteria, respectively. More yeast species were identified in fresh (fermented for 2–5 days) kocho, compared to long-term (7–12 months) fermented kocho, while we observed an opposite trend for LABs. In fresh kocho, the most frequently isolated yeast species were Pichia exigua, Galactomyces geotrichum, and Pichia fermentans. From mid-term (3–4 months) kocho most frequently Candida cabralensis, G. geotrichum, and Candida ethanolica were isolated. In the long-term fermentations, the most frequently isolated yeast was Saturnispora silva. Lactobacillus plantarum was the most frequently isolated LAB in both fresh and mid-term kocho. In long-term fermented kocho, Acetobacter pasteurianus and L. plantarum were most frequently isolated. L. plantarum was consistently isolated from all the three stages of fermentation. Aerobic bacteria in fresh kocho were mostly gram-negative, with Raoultella planticola and Pantoea agglomerans being the most frequently isolated species. In long-term fermented kocho, mainly gram-positive, spore-forming bacteria of the genus Bacillus were found, among them also species of the Bacillus cereus group, Bacillus anthracis and Bacillus thurigiensis.
      PubDate: 2019-04-01
  • A phylogenomic and molecular markers based taxonomic framework for members
           of the order Entomoplasmatales : proposal for an emended order
           Mycoplasmatales containing the family Spiroplasmataceae and emended family
           Mycoplasmataceae comprised of six genera
    • Abstract: Abstract The “Spiroplasma cluster” is a taxonomically heterogeneous assemblage within the phylum Tenericutes encompassing different Entomoplasmatales species as well as the genus Mycoplasma, type genus of the order Mycoplasmatales. Within this cluster, the family Entomoplasmataceae contains two non-cohesive genera Entomoplasma and Mesoplasma with their members exhibiting extensive polyphyletic branching; additionally, the genus Mycoplasma is also embedded within this family. Genome sequences are now available for all 19 Entomoplasmataceae species with validly published names, as well as 6 of the 7 species from the genus Mycoplasma. With the aim of developing a reliable phylogenetic and taxonomic framework for the family Entomoplasmataceae, exhaustive phylogenetic and comparative genomic studies were carried out on these genome sequences. Phylogenetic trees were constructed based on concatenated sequences of 121 core proteins for this cluster, 67 conserved proteins shared with the phylum Firmicutes, 40 ribosomal proteins, three major subunits of RNA polymerase (RpoA, B and C) by different means and also for the 16S rRNA gene sequences. The interspecies relationships as well as different species groups observed in these trees were identical and robustly resolved. In all of these trees, members of the genera Mesoplasma and Entomoplasma formed three and two distinct clades, respectively, which were interspersed among the members of the other genus. The observed species groupings in the phylogenetic trees are independently strongly supported by our identification of 103 novel molecular markers or synapomorphies in the forms of conserved signature indels and conserved signature proteins, which are uniquely shared by the members of different observed species clades. To account for the different observed species clades, we are proposing a division of the genus Mesoplasma into an emended genus Mesoplasma and two new genera Tullyiplasma gen. nov. and Edwardiiplasma gen. nov. Likewise, to recognize the distinct species groupings of Entomoplasma, we are proposing its division into an emended genus Entomoplasma and a new genus Williamsoniiplasma gen. nov. Lastly, to rectify the long-existing taxonomic anomaly caused by the presence of genus Mycoplasma (order Mycoplasmatales) within the Entomoplasmatales, we are proposing an emendation of the family Mycoplasmataceae to include both Entomoplasmataceae plus Mycoplasma species and an emendation of the order Mycoplasmatales, which now comprises of the emended family Mycoplasmataceae and the family Spiroplasmataceae. The taxonomic reclassifications proposed here accurately reflect the species relationships within this group of Tenericutes and they should lead to a better understanding of their biological and pathogenic characteristics.
      PubDate: 2019-04-01
  • Mucilaginibacter formosus sp. nov., a bacterium isolated from road-side
    • Abstract: Abstract A Gram-stain negative, aerobic, non-motile and rod-shaped novel bacterial strain, designated as MAH-5T, was isolated from a road-side soil sample and was characterised by using a polyphasic taxonomic approach. The colonies were observed to be yellowish orange in colour, smooth, circular and 0.3–0.7 mm in diameter when grown on nutrient agar for 2 days. Strain MAH-5T was found to be able to grow at 15–35 °C and at pH 4.0–8.0. The strain was observed to be positive for both the catalase and oxidase tests. Cells were found to be able to hydrolyse aesculin, gelatin and starch. By 16S rRNA gene sequence comparisons, the isolate was identified as a member of the genus Mucilaginibacter and to be closely related to Mucilaginibacter panaciglaebae BXN5-31T (98.35%), Mucilaginibacter soyangensis HME6664T (97.82%), Mucilaginibacter antarcticus S14-88T (97.49%) and Mucilaginibacter ximonensis XM-003T (97.06%). In DNA–DNA hybridization tests, the DNA relatedness values between strain MAH-5T and its close phylogenetic neighbors were below 45.0%. The genomic DNA G + C content of strain MAH-5T was determined to be 41.5 mol% and the predominant isoprenoid quinine was identified as MK-7. The major fatty acids were identified as C15:0 iso and summed feature 3 (comprising C16:1ω7c and/or C16:1ω6c). The genetic characteristics, in combination with chemotaxonomic and physiological data, demonstrated that the isolated strain MAH-5T represents a novel species within the genus Mucilaginibacter, for which the name Mucilaginibacter formosus sp. nov. is proposed, with MAH-5T as the type strain (= KACC 19291T = CGMCC1.16489T).
      PubDate: 2019-04-01
  • Haloprofundus halophilus sp. nov., isolated from the saline soil of Tarim
    • Abstract: Abstract A novel halophilic archaeon, designated NK23T, was isolated from an inland saline soil sampled from Xinjiang, China. The cells of strain NK23T were observed to be pleomorphic, to stain Gram-negative and form red-pigmented colonies on agar plates. The strain can grow at 25–50 °C (optimum 37 °C), at 0.9–4.8 M NaCl (optimum 2.1 M), at 0–1.0 M MgCl2 (optimum 0.05 M) and at pH 6.5–9.5 (optimum pH 7.0). The polar lipids were found to be phosphatidic acid, phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester, mannosyl glucosyl diether, sulfated mannosyl glucosyl diether, and three minor unidentified glycolipids, which were chromatographically identical to those detected in Haloprofundus (Hpf.) marisrubri CGMCC 1.14959T. On the basis of 16S rRNA gene and rpoB′ gene sequence similarities and phylogenetic analysis, strain NK23T was found to be related to Hpf. marisrubri CGMCC 1.14959T (97.8% and 94.1% similarities, respectively). The average nucleotide identity values and in silico DNA–DNA hybridization values between strain NK23T and Hpf. marisrubri SB9T were 85.22% and 29.3%, respectively. The DNA G+C content of the novel strain was determined to be 65.29 mol%. Based on the phenotypic and chemotaxonomic data, together with phylogenetic relationships, strain NK23T (= CGMCC 1.14944T = JCM 30670T) is considered to represent a new species of the genus Haloprofundus, for which the name Haloprofundus halophilus sp. nov. is proposed.
      PubDate: 2019-04-01
  • Lentzea isolaginshaensis sp. nov., an actinomycete isolated from desert
    • Abstract: Abstract A novel actinomycete, designated strain NX62T, was isolated from desert soil obtained from Isolaginsha, Ningxia Hui Autonomous Region, China. Its taxonomic position was determined using a polyphasic approach. The strain shows the typical morphological and chemotaxonomic features of members of the genus Lentzea: slight to dark yellow substrate mycelia and white to greyish white aerial hyphae fragmenting into rod-shaped elements; meso-diaminopimelic acid in the cell wall peptidoglycan; MK-9(H4) and MK-9(H2) as menaquinones; diphosphatidylglycerol, phosphatidylethanolamine, hydroxy-phosphatidylethanolamine and phosphatidylinositol as main polar lipids; iso-C16:0 and iso-C17:0 as major cellular fatty acids; and DNA G+C content of 70.1 mol%. 16S rRNA gene sequence analysis indicated that strain NX62T shows high similarity to Lentzea cavernae SYSU K10001T (99.3%) and Lentzea albida IFO 16102T (98.9%), and formed a monophyletic clade with L. cavernae SYSU K10001T in the phylogenetic tree. Based on a comparison of the phenotypic properties and the low level of DNA–DNA relatedness, strain NX62T can be distinguished from phylogenetically related Lentzea species. Therefore, it is concluded that strain NX62T represents a novel species of the genus Lentzea, for which the name Lentzea isolaginshaensis sp. nov. is proposed. The type strain is NX62T (= CGMCC 4.7522T = KCTC 49179T).
      PubDate: 2019-04-01
  • Yeast molecular chaperone gene SSB2 is involved in the endoplasmic
           reticulum stress response
    • Abstract: Abstract The Saccharomyces cerevisiae chaperone gene SSB2 belongs to the Hsp70 family. Unlike other HSP70 genes, SSB2 gene expression is reduced after heat shock. It has been reported that Ssb2p can be cross-linked to ribosome-bound nascent polypeptide chains, suggesting a potential role of SSB2 in the endoplasmic reticulum (ER) stress response. In this study, SSB2-deletion and SSB2-overexpression yeast strains were generated and applied to explore the potential mechanism by which SSB2 is involved in the tunicamycin (TM)-induced ER stress response. We demonstrate for the first time that SSB2 deficiency results in reduced resistance to TM, while overexpression of SSB2 increases resistance to TM in an IRE1-HAC1 pathway-dependent manner; these observations are related to changes in intracellular unfolded protein response activities (under the TM-stressed condition). Additionally, SSB2 deletion induces early apoptosis and it may play a causal role in the shortened replicative life span of ssb2Δ mutants observed in this study. These findings highlight the involvement of SSB2 in ER stress responses and ageing in yeast.
      PubDate: 2019-04-01
  • Characterization of a strain representing a new Enterobacter species,
           Enterobacter chengduensis sp. nov.
    • Abstract: Abstract An Enterobacter strain, WCHECl-C4, was recovered from a human blood sample in China in 2015. Phylogenetic analysis based on multi-locus sequence analysis of the rpoB, gyrB, infB and atpD housekeeping genes revealed that the strain is distinct from any previously described species of the genus Enterobacter. The whole genome sequence of strain WCHECl-C4 has an 80.48–93.34% average nucleotide identity with those of type strains of all known Enterobacter species. In silico DNA–DNA hybridization (isDDH) values between strain WCHECl-C4 and type strains of all known Enterobacter species range from 23.2 to 52.4%. The major cellular fatty acids of strain WCHECl-C4 are C16:0, C17:0 cyclo and C18:1ω7c, which are in the range of Enterobacter species. The genomic DNA G + C content was 55.7 mol%. Strain WCHECl-C4 can be distinguished from all known Enterobacter species by its ability to ferment d-sorbitol, l-rhamnose and melibiose but with a negative Voges–Proskauer reaction. Genotypic and phenotypic characteristics from this study indicate that strain WCHECl-C4 represents a novel species of the genus Enterobacter, for which the name Enterobacter chengduensis sp. nov. is proposed. The type strain is WCHECl-C4T (= GDMCC1.1216T = CCTCC AB 2017105T = KCTC 52993T).
      PubDate: 2019-04-01
  • Population structure and genetic diversity of Vibrio parahaemolyticus from
           a coastal area of China based on a multi-locus sequence typing (MLST)
    • Abstract: Abstract The Gram-negative marine bacterium Vibrio parahaemolyticus has been identified as a major cause of bacterial food poisoning in China. Here, the population structure and genetic diversity of V. parahaemolyticus from Weihai, a coastal city in China, was studied by the multi-locus sequence typing (MLST) method. In this survey, we isolated 40 strains including environmental and clinical samples of patients with acute gastroenteritis or diarrhea; isolates from other countries were also included for comparison. DnaSP Version5, START V2, eBURST version3 and Mega 6 were used to analyse the data. We found that ST3 and ST332 were the most prevalent clones and that they were closely associated with acute diarrhoeal diseases. These STs showed a low dN/dS ratio and significant linkage disequilibrium. All isolates were divided into four clonal complexes, six groups and nine singletons, showing a high degree of genetic diversity. 18 STs, mostly from environmental isolates, were recognised by the MLST analysis for the first time. In conclusion, ST3 and ST332 were the epidemic STs in the coastal area. ST332 might be a region-specific ST, which needs to be confirmed by further analysis. Thus, the long-term monitoring of V. parahaemolyticus plays an important role in preventing and controlling the transmission between environment and people in Weihai.
      PubDate: 2019-03-15
  • Mesorhizobium carboni s sp. nov., isolated from coal bed water
    • Abstract: Abstract A Gram-stain negative, aerobic, motile, short rod-shaped bacterium, designated as B2.3T, was isolated from coal bed water collected from Jincheng, Shanxi Province, China. The strain was able to grow at 10–40 °C (optimum 28–30 °C), pH 4.0–10.0 (optimum 7.0), and in the presence of 0–5.0% NaCl (optimum 3.0%, w/v). Phylogenetic analysis based on the 16S rRNA and concatenated housekeeping gene recA, atpD and glnA sequences showed strain B2.3T belongs to the genus Mesorhizobium, with Mesorhizobium oceanicum B7T as the closely related type strain. Strain B2.3T exhibited ANI value of 77.5% and GGDC value of 21.5% to M. oceanicum B7T. The major fatty acids were identified as summed feature 8 (C18:1ω7c and/or C18:1ω6c) and 11-methyl C18:1ω7c. The major polar lipids were found to consist of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine and an unidentified aminophospholipid. The predominant ubiquinone was identified as Quinone 10. Phenotypic and biochemical analysis results indicated that strain B2.3T can be distinguished from closely related type strains. On the basis of phenotypic, genotypic and chemotaxonomic characteristics, strain B2.3T is concluded to represent a novel species in the genus Mesorhizobium, for which the name Mesorhizobium carbonis sp. nov. is proposed. The type strain is B2.3T (=CGMCC 1.15730T = KCTC 52461T).
      PubDate: 2019-03-14
  • Emended description of the genus Tabrizicola and the species Tabrizicola
           aquatica as aerobic anoxygenic phototrophic bacteria
    • Abstract: Abstract The genus Tabrizicola with its type species and strain Tabrizicola aquatica RCRI19T was previously described as a purely chemotrophic genus of Gram-negative, aerobic, non-motile and rod-shaped bacteria. With the present study, we expand the description of the metabolic capabilities of this genus and the T. aquatica type strain to include chlorophyll-dependent phototrophy. Our results confirmed that T. aquatica, does not grow under anaerobic photoautotrophic or photoheterotrophic conditions. However, the presence of the photosynthesis-related genes pufL and pufM could be demonstrated in the genomes of several Tabrizicola strains. Additionally, photosynthetic pigments (bacteriochlorophyll a) were formed under aerobic, heterotrophic and low light conditions in T. aquatica strain RCRI19T. Furthermore, all the genes necessary for a fully operational photosynthetic apparatus and bacteriochlorophyll a are present in the T. aquatica type strain genome. Therefore, we suggest categorising T. aquatica RCRI19T, isolated from freshwater environment of Qurugöl Lake, as an aerobic anoxygenic phototrophic (AAP) bacterium.
      PubDate: 2019-03-12
  • Assessment of Rhodopirellula rubra as a supplementary and nutritional food
           source to the microcrustacean Daphnia magna
    • Abstract: Abstract The daily use of the planctomycete Rhodopirellula rubra as an alternative or supplementary food source for Daphnia magna and its feasibility in the nutrition of transgenerational populations were studied. The life history parameters, fatty acids (saturated, mono- and polyunsaturated; SFAs, MUFAs and PUFAs), glycogen and protein contents of organisms during feeding assays and of the first generation were analysed. An increase in the yields of D. magna with the increase of the cell concentration of R. rubra was evident, but overall, bacteria supplied as the only food source was nutritionally insufficient as observed for all the parameters analysed. However, when R. rubra was added as supplement to the microalgae Raphidocelis subcapitata a significant improvement in the life history parameters was observed namely in the reproductive output and the somatic growth rate. The identified SFAs, MUFAs and PUFAs were the fatty acids more abundant in daphniids, and the feed regimens influenced daphniids fatty acid profiles. Additionally, the mixed diet resulted in a larger number and size of offspring in the different F1 broods as also observed with the results of F0 generation. The pink colouration present in D. magna body and eggs confirmed that bacteria were absorbed, the pigment(s) retained and passed on to the next generation. Our results showed that R. rubra can play an essential role in D. magna diet as a nutritional supplement showing potential biotechnological applications.
      PubDate: 2019-03-11
  • Pseudoxanthomonas composti sp. nov., isolated from compost
    • Abstract: Abstract A Gram-staining negative bacterium, designated as GSS15T, was isolated from compost in Guangzhou, China. Cells of strain GSS15T were rod-shaped and non-motile. The isolate was able to grow at 15–42 °C (optimum 30 °C) and pH 6.0–11.0 (optimum pH 8.0), and tolerate up to 6.0% NaCl (w/v). When the 16S rRNA gene sequence of the isolate was compared with those of other bacteria, the highest similarity was observed with Pseudoxanthomonas helianthi roo10T (96.9%). Furthermore, strain GSS15T showed low ANI (75.7–79.5%) and DDH (24.2–18.3%) values to the closely related species. Q-8 was the predominant respiratory quinone. The major cellular fatty acids ( > 5%) were iso-C15:0 (18.7%), C16:1ω7c (18.6%), anteiso-C15:0 (13.2%), C16:0 (9.8%), and iso-C16:0 (8.8%). The polar lipids consisted of phosphatidylethanolamine, phosphatidylglycerol, and diphosphatidylglycerol. Based on its phenotypic, chemotaxonomic and genotypic data, strain GSS15T (= KCTC 52974T = MCCC 1K03334T) is designated as the type strain of a novel species of the genus Pseudoxanthomonas, for which the name Pseudoxanthomonas composti sp. nov. is proposed.
      PubDate: 2019-03-09
  • Sugarcane must fed-batch fermentation by Saccharomyces cerevisiae: impact
           of sterilized and non-sterilized sugarcane must
    • Abstract: Abstract The presence of microbial contaminants is common in the sugarcane ethanol industry and can decrease process yield, reduce yeast cell viability and induce yeast cell flocculation. To evaluate the effect of microbial contamination on the fermentation process, we compared the use of sterilized and non-sterilized sugarcane must in the performance of Saccharomyces cerevisiae with similar fermentation conditions to those used in Brazilian mills. Non-sterilized sugarcane must had values of 103 and 108 CFU mL−1 of wild yeast and bacterial contamination, respectively; decreased total reducing sugar (TRS); and increased lactic and acetic acids, glycerol and ethanol concentrations during storage. During fermentation cycles with sterilized and non-sterilized sugarcane must, S. cerevisiae viability did not change, whereas ethanol yield varied from 74.1 to 80.2%, but it did not seem to be related to must microbial contamination. Ethanol productivity decreased throughout the fermentation cycles and was more pronounced in the last two fermentation cycles with non-sterilized must, but that may be related to the decrease in must TRS. High values of the ratio of total acid production per ethanol were reported at the end of the last two fermentation cycles conducted with non-sterilized must. Additionally, the values of wild yeast contamination increased from 102 to 103 CFU mL−1 and bacterial contamination increased from 104 to 106 CFU mL−1 when comparing the first and last fermentation cycles with non-sterilized must. In addition to the increase in microbial contamination and acid concentration, ethanol yield and yeast viability rates were not directly affected by the microbial contamination present in the non-sterilized sugarcane must.
      PubDate: 2019-03-04
  • Variation of bacterial biodiversity from saline soils and estuary
           sediments present near the Mediterranean Sea coast of Camargue (France)
    • Abstract: Abstract Salinity is an important environmental factor influencing microbial community composition. To better understand this influence, we determined the bacterial communities present in 17 different sites of brackish sediment (underwater) and soil (surface) samples from the Camargue region (Rhône river delta) in southern France during the fall of 2013 and 2014 using pyrosequencing of the V3–V4 regions of the 16S rRNA genes amplified by PCR. This region is known for abundant flora and fauna and, though saline, 30% of rice consumed in France is grown here. We found that bacterial abundance in 1 g of soil or sediment, calculated by qPCR, was higher in sediments than in surface soil samples. Members belonging to the Proteobacteria, Bacteroidetes, Chloroflexi and Firmicutes phyla dominated the bacterial communities of sediment samples, while members belonging to the Proteobacteria, Bacteroidetes, Gemmatimonadetes, Actinobacteria, Firmicutes and Acidobacteria phyla dominated the bacterial communities of the soil samples. The most abundant bacterial genera present in the saline sediments and soils from the Camargue belonged mostly to halophilic and sulphate reducing bacteria, suggesting that the Camargue may be a valuable system to investigate saline, yet agriculturally productive, sediment and soil microbial ecosystem.
      PubDate: 2019-03-01
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Tel: +00 44 (0)131 4513762

Your IP address:
Home (Search)
About JournalTOCs
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-