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Archives of Microbiology

Chao Wang, Yanhua Cui, Xiaojun Qu
Lactobacillus delbrueckii subsp. bulgaricus is currently one of the most valuable lactic acid bacteria (LAB) and widely used in global dairy industry. The acid tolerance and adaptation ability of LAB is the key point of their survival and proliferation during fermentation process and in gastrointestinal tract of human body. Two component system (TCS) is one of the most important mechanisms to allow bacteria to sense and respond to changes of environmental conditions. TCS typically consists of a histidine protein kinase (HPK) and a corresponding response regulator (RR)...
July 18, 2018: Archives of Microbiology
Hitesh Tikariha, Anshuman A Khardenavis, Hemant J Purohit
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...
July 11, 2018: Archives of Microbiology
João Pedro Rueda Furlan, Vânia Santos Braz, Jonas Augusto Rizzato Paschoal, Eliana Guedes Stehling
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...
July 4, 2018: Archives of Microbiology
Jie Xu, Xiu-Hong Xu, Meng-Qi Men, Qing-Xin Meng, Ben-Shu Xu
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...
July 4, 2018: Archives of Microbiology
Ekaterine Zhgenti, Ping Hu, Gvantsa Chanturia, David Tsereteli, Merab Kekelidze, Svetlana Chubinidze, Ekaterine Zangaladze, Paata Imnadze, Gary Andersen, Tamas Torok
Yersinia pestis, the causative agent of plague, is a recently evolved clone of the enteropathogenic bacterium Yersinia pseudotuberculosis. Y. pestis has been extensively studied for decades; however, there are insufficient data about the intra-species diversity of this microorganism in certain parts of the world, including the Caucasus region. Using a high-density single-nucleotide polymorphism (SNP) microarray, we genotyped a total of 46 Y. pestis isolates from two plague foci in Georgia and neighboring Caucasus countries together with 12 Y...
July 4, 2018: Archives of Microbiology
Sakshi Sharma, Simmi Grewal, Jyoti Vakhlu
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...
July 4, 2018: Archives of Microbiology
Jianfei Chen, Ningning Li, Shuguang Xie, Chao Chen
It is known that both disinfection and water quality can influence the bacterial communities in a drinking water distribution system (DWDS). Here, we hypothesized that bacterial communities in a DWDS with untreated groundwater with no prior purification and disinfection might differ from those in a DWDS with disinfected surface water. The present study applied Illumina MiSeq sequencing to investigate biofilm and planktonic bacterial communities in a DWDS fed with untreated groundwater (receiving no prior purification and disinfection)...
June 28, 2018: Archives of Microbiology
Jaewoo Yoon, Mina Yasumoto-Hirose, Hiroaki Kasai
A novel marine bacterium, designated 04OKA-3-218T , was isolated from the hard coral Galaxea fascicularis L. collected in Japan. The strain was dark-brown-pigmented, Gram-negative, strictly aerobic, curved-rod-shaped and non-motile. Phylogenetic analysis based on the 16S rRNA gene sequence showed the affiliation of the isolate with members of the family Flavobacteriaceae of the phylum Bacteroidetes, with the highest sequence similarity (95.2%) to Spongiibacterium pacificum SW169T . The DNA G+C content was 42...
June 28, 2018: Archives of Microbiology
Ewa Sajnaga, Waldemar Kazimierczak, Marcin Skowronek, Magdalena Lis, Tomasz Skrzypek, Adam Waśko
Three strains of symbiotic bacteria were isolated from an entomopathogenic nematode Steinernema poinari retrieved from soil in eastern Poland. Using 16S rDNA, recA, gltX, gyrB, and dnaN gene sequences for phylogenetic analysis, these strains were shown to belong to the species Xenorhabdus bovienii. The nucleotide identity between the studied S. poinari microsymbionts and other X. bovienii strains calculated for 16S rDNA and concatenated sequences of four protein-coding genes was 98.7-100% and 97.9-99.5%, respectively...
June 26, 2018: Archives of Microbiology
Shobit Thapa, Radha Prasanna, Balasubramanian Ramakrishnan, Neelam Sheoran, Aundy Kumar, Kulandaivelu Velmourougane, Arun Kumar
Severity of plant diseases is often influenced by the availability of nutrients, particularly N; however, its effect on the phyllosphere microbiome in foliar pathogen challenged plants is less investigated in rice. The tripartite interaction among the fungal pathogen (Magnaporthe oryzae), rice cultivars (basmati and non-basmati, blast resistant or susceptible) and nitrogen (N) fertilization (0, 120 and 180 N) was investigated. Plant growth, elicitation of defense responses and abundance of microbial members in the rice phyllosphere were monitored using biochemical and molecular methods...
June 25, 2018: Archives of Microbiology
Tóshiko Takahashi-Íñiguez, Joana Barrios-Hernández, Marion Rodríguez-Maldonado, María Elena Flores
The oxidation of malate to oxaloacetate is catalysed only by a nicotinamide adenine dinucleotide-dependent malate dehydrogenase encoded by SCO4827 in Streptomyces coelicolor. A mutant lacking the malate dehydrogenase gene was isolated and no enzymatic activity was detected. As expected, the ∆mdh mutant was unable to grow on malate as the sole carbon source. However, the mutant grew less in minimal medium with glucose and there was a delay of 36 h. The same behaviour was observed when the mutant was grown on minimal medium with casamino acids or glycerol...
June 23, 2018: Archives of Microbiology
Yuta Kawasaki, Kaishi Kurosaki, Daisuke Kan, Isabele Kazahaya Borges, Ayumi Satake Atagui, Michio Sato, Keiko Kondo, Masato Katahira, Ichiro Suzuki, Minoru Takeda
Thiothrix nivea is a filamentous sulfur-oxidizing bacterium common in activated sludge and its filament is covered with a polysaccharide layer called sheath. In this study, we found that T. nivea aggregates under acidic conditions. A hexagonal lattice pattern, a typical morphological feature of proteinaceous S-layers, was newly observed on the surface of the sheath by transmission electron microscopy. The pattern and the acid-dependent aggregation were not observed in T. fructosivorans, a relative sheath-forming bacterium of T...
June 22, 2018: Archives of Microbiology
Adetomiwa Ayodele Adeniji, Olubukola Oluranti Babalola
This review presents biocontrol agents employed to alleviate the deleterious effect of the pathogen Fusarium graminearum on maize. The control of this mycotoxigenic phytopathogen remains elusive despite the elaborate research conducted on its detection, identification, and molecular fingerprinting. This could be attributed to the fact that in vitro and greenhouse biocontrol studies on F. graminearum have exceeded the number of field studies done. Furthermore, along with the variances seen among these F. graminearum suppressing biocontrol strains, it is also clear that the majority of research done to tackle F...
June 22, 2018: Archives of Microbiology
Amanda O Dos S Melo-Nascimento, Claudia Treumann, Camila Neves, Edmilson Andrade, Ana Camila Andrade, Robert Edwards, Elizabeth Dinsdale, Thiago Bruce
Overcoming recalcitrance of lignin has motivated bioprospecting of high-yielding enzymes from environmental ligninolytic microorganisms associated with lignocellulose degrading-systems. Here, we performed isolation of 21 ligninolytic strains belonging to the genus Klebsiella spp., driven by the presence of lignin in the media. The fastest-growing strains (FP10-5.23, FP10-5.22 and P3TM1) reached the stationary phase in approximately 24 h, in the media containing lignin as the main carbon source. The strains showed biochemical evidence of ligninolytic potential in liquid- and solid media-converting dyes, which the molecular structures are similar to lignin fragments...
June 11, 2018: Archives of Microbiology
Admir J Giachini, Thays S Sulzbach, Antônio L Pinto, Rafael D Armas, Douglas H Cortez, Emanuela P Silva, Elizandra B Buzanello, Álvaro G Soares, Cláudio R F S Soares, Márcio J Rossi
Sulfate-reducing bacteria (SRB) and a biochar array were used to reduce sulfate concentrations and the levels of metals in acid mine drainage (AMD) waters. Cow manure SRB-enriched biochar promoted sulfate reductions of 41% compared to original AMD, and 39% compared to other treatments (control, AMD sediment, sludge). Treatments reduced levels of all analyzed metals below Brazilian official standards. DGGE showed a significant relation between SRB-source and SRB-structural community, where cow manure and sludge presented the more cohesive community structure throughout the monitoring (180 days)...
June 11, 2018: Archives of Microbiology
Ruijie Gao, Zhecun Xu, Huaxiang Deng, Zhengbing Guan, Xiangru Liao, Ye Zhao, Xiaohui Zheng, Yujie Cai
Light is a very important signal for fungi since it influences many different physiological responses. The effects of dark or light at different wavelengths on growth, reproduction and hypocrellins of Shiraia sp. SUPER-H168 were studied: dark, white, red, yellow, green, blue and purple. All incubations under different light conditions had significant stimulating effects on aerial hyphae and suppressing effects on hypocrellin biosynthesis compared with dark incubation. Under blue and purple light especially blue light, the colonies with profuse growth of aerial mycelium were formed...
June 11, 2018: Archives of Microbiology
Lamia Abdellaziz, Marlène Chollet, Ahmed Abderrahmani, Max Béchet, Lamia Yaici, Gabrielle Chataigné, Anthony Arguelles Arias, Valérie Leclère, Philippe Jacques
Several Bacillus strains have been well studied for their ability to control soil-borne plant diseases. This property is linked to the production of several families of lipopeptides. Depending of their structure, these compounds show antifungal and/or plant systemic resistance inducing activities. In this work, the biodiversity of lipopeptides produced by different antifungal Bacillus strains isolated from seeds, rhizospheric, and non-rhizospheric soils in Algeria was analyzed. Sixteen active strains were characterized by PCR for their content in genes involved in lipopeptide biosynthesis and by MALDI-ToF for their lipopeptide production, revealing a high biodiversity of products...
June 9, 2018: Archives of Microbiology
Josiane Fukami, Francisco Javier Ollero, Clara de la Osa, Rocio Valderrama-Fernández, Marco Antonio Nogueira, Manuel Megías, Mariangela Hungria
We investigated the effects of Azospirillum brasilense strains Ab-V5 and Ab-V6 in the induction of mechanisms of systemic acquired resistance (SAR) and induced system resistance (ISR) on maize (Zea mays L.) plants. Under normal growth conditions, the treatments consisted of the standard inoculation of cells at sowing, and leaf spray of cells or their metabolites at the V2.5 growth stage; under saline stress (170 mM NaCl), the treatment consisted of standard single and co-inoculation of A. brasilense and Rhizobium tropici...
June 7, 2018: Archives of Microbiology
Sooyeon Park, Ji-Min Park, Jung-Sook Lee, Tae-Kwnag Oh, Jung-Hoon Yoon
A lipolytic bacterial strain, designated BPTF-M5T , was isolated from a tidal flat sediment of the Yellow Sea in Republic of Korea, and identified by a polyphasic taxonomic approach. It was Gram negative, aerobic, non-motile and rod shaped. Strain BPTF-M5T grew optimally at 30 °C and in the presence of 2.0-3.0% (w/v) NaCl. A neighbour-joining phylogenetic tree of 16S rRNA gene sequences showed that strain BPTF-M5T fell within the clade comprising the type strains of Pseudoruegeria species. The novel strain exhibited the highest 16S rRNA gene sequence similarity value (98...
June 7, 2018: Archives of Microbiology
Sooyeon Park, Ji-Min Park, Jung-Sook Lee, Jung-Hoon Yoon
A bacterial strain, designated GM-8T , which was isolated from seawater around Pohang in Republic of Korea, was subjected to a polyphasic taxonomic study. It was lipolytic, Gram-stain-negative, aerobic, non-motile and coccoid, ovoid, or rod-shaped. Strain GM-8T grew optimally at 30 °C and in the presence of 2.0-3.0% (w/v) NaCl. The phylogenetic trees of 16S rRNA gene sequences based on three algorithms showed that strain GM-8T joined the clade comprising the type strains of Zhongshania species. The novel strain exhibited the highest 16S rRNA gene sequence similarity value (98...
June 7, 2018: Archives of Microbiology
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