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Microbiological Research

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https://www.readbyqxmd.com/read/28454714/growth-promotion-of-peanut-arachis-hypogaea-l-and-maize-zea-mays-l-plants-by-single-and-mixed-cultures-of-efficient-phosphate-solubilizing-bacteria-that-are-tolerant-to-abiotic-stress-and-pesticides
#1
María Soledad Anzuay, María Gabriela Ruiz Ciancio, Liliana Mercedes Ludueña, Jorge Guillermo Angelini, Germán Barros, Nicolás Pastor, Tania Taurian
The aims of this study were, to analyze in vitro phosphate solubilization activity of six native peanut bacteria and to determine the effect of single and mixed inoculation of these bacteria on peanut and maize plants. Ability to produce organic acids and cofactor PQQ, to solubilize FePO4 and AlPO4 and phosphatase activity were analyzed. Also, the ability to solubilize phosphate under abiotic stress and in the presence of pesticides of the selected bacteria was determined. The effect of single and mixed bacterial inocula was analyzed on seed germination, maize plant growth and in a crop rotation plant assay with peanut and maize...
June 2017: Microbiological Research
https://www.readbyqxmd.com/read/28454713/fengycin-produced-by-bacillus-subtilis-9407-plays-a-major-role-in-the-biocontrol-of-apple-ring-rot-disease
#2
Haiyan Fan, Jinjiang Ru, Yuanyuan Zhang, Qi Wang, Yan Li
Apple ring rot, caused by Botryosphaeria dothidea, is a serious apple disease in China. Bacillus subtilis 9407 was isolated from healthy apples and showed strong antifungal activity against B. dothidea. To identify the primary antifungal compound of B. subtilis 9407 and determine its role in controlling apple ring rot, a transposon mutant library was constructed using TnYLB-1, and a mutant completely defective in antifungal activity was obtained. The gene inactivated in the antifungal activity mutant had 98...
June 2017: Microbiological Research
https://www.readbyqxmd.com/read/28454712/transcriptome-based-analysis-of-the-saprophytic-fungus-abortiporus-biennis-response-to-oxalic-acid
#3
Marcin Grąz, Anna Jarosz-Wilkołazka, Grzegorz Janusz, Andrzej Mazur, Jerzy Wielbo, Piotr Koper, Kamil Żebracki, Agnieszka Kubik-Komar
In this study, the transcriptomic-based response of the white rot fungus Abortiporus biennis to oxalic acid induction was reported. The whole transcriptome of A. biennis was analysed using the RNA-based sequencing technology and Solid 5500 platform. De novo assembly of reads generated 37,719 contigs. A molecular function for 26,280 unique transcripts was assigned. The analysis of the A. biennis transcriptome predicted 635 hypothetical open reading frames encoding carbohydrate active enzymes distributed in 122 families...
June 2017: Microbiological Research
https://www.readbyqxmd.com/read/28454711/microbial-interference-mitigates-meloidogyne-incognita-mediated-oxidative-stress-and-augments-bacoside-content-in-bacopa-monnieri-l
#4
Rupali Gupta, Akanksha Singh, P V Ajayakumar, Rakesh Pandey
Microbial interference plays an imperative role in plant development and response to various stresses. However, its involvement in mitigation of oxidative stress generated by plant parasitic nematode in plants remains elusive. In the present investigation, the efficacy of microbe's viz., Chitiniphilus sp. MTN22 and Streptomyces sp. MTN14 single and in combinations was examined to mitigate oxidative stress generated by M. incognita in medicinal plant, Bacopa monnieri. Microbial combination with and without pathogen also enhanced the growth parameters along with secondary metabolites (bacoside) of B...
June 2017: Microbiological Research
https://www.readbyqxmd.com/read/28454710/identification-of-putative-effector-genes-and-their-transcripts-in-three-strains-related-to-candidatus-phytoplasma-aurantifolia
#5
Ameneh Anabestani, Keramat Izadpanah, Simona Abbà, Luciana Galetto, Abozar Ghorbani, Sabrina Palmano, Majid Siampour, Flavio Veratti, Cristina Marzachì
Molecular mechanisms underlying phytoplasma interactions with host plants are largely unknown. In this study attempts were made to identify effectors of three phytoplasma strains related to 'Ca. P. aurantifolia', crotalaria phyllody (CrP), faba bean phyllody (FBP), and witches' broom disease of lime (WBDL), using information from draft genome of peanut witches' broom phytoplasma. Seven putative effectors were identified in WBDL genome (SAP11, SAP21, Eff64, Eff115, Eff197, Eff211 and EffSAP67), five (SAP11, SAP21, Eff64, Eff99 and Eff197) in CrP and two (SAP11, Eff64) in FBP...
June 2017: Microbiological Research
https://www.readbyqxmd.com/read/28454709/involvement-of-phenazine-1-carboxylic-acid-in-the-interaction-between-pseudomonas-chlororaphis-subsp-aureofaciens-strain-m71-and-seiridium-cardinale-in-vivo
#6
Aida Raio, Pierluigi Reveglia, Gerardo Puopolo, Alessio Cimmino, Roberto Danti, Antonio Evidente
Pseudomonas chlororaphis subsp. aureofaciens encompasses bacterial strains that effectively control phytopathogenic fungi through the production of the natural antibiotics named phenazines. In this work, the involvement of phenazine production in the interaction between the biological control agent P. chlororaphis subsp. aureofaciens M71 and the fungus Seiridium cardinale, a serious cypress pathogen, was investigated. Field trials were carried out to assess the role of phenazines in the control of S. cardinale in vivo...
June 2017: Microbiological Research
https://www.readbyqxmd.com/read/28454708/functional-characterisation-of-burkholderia-pseudomallei-biotin-protein-ligase-a-toolkit-for-anti-melioidosis-drug-development
#7
Thomas E H Bond, Alanna E Sorenson, Patrick M Schaeffer
Burkholderia pseudomallei (Bp) is the causative agent of melioidosis. The bacterium is responsible for 20% of community-acquired sepsis cases and 40% of sepsis-related mortalities in northeast Thailand, and is intrinsically resistant to aminoglycosides, macrolides, rifamycins, cephalosporins, and nonureidopenicillins. There is no vaccine and its diagnosis is problematic. Biotin protein ligase (BirA) which is essential for fatty acid synthesis has been proposed as a drug target in bacteria. Very few bacterial BirA have been characterized, and a better understanding of these enzymes is necessary to further assess their value as drug targets...
June 2017: Microbiological Research
https://www.readbyqxmd.com/read/28454707/piriformospora-indica-promotes-growth-seed-yield-and-quality-of-brassica-napus-l
#8
Zhen-Zhu Su, Ting Wang, Neeraj Shrivastava, You-Yuan Chen, Xiaoxi Liu, Chao Sun, Yufeng Yin, Qi-Kang Gao, Bing-Gan Lou
In current scenario, crop productivity is being challenged by decreasing soil fertility. To cope up with this problem, different beneficial microbes are explored to increase the crop productivity with value additions. In this study, Brassica napus L., an important agricultural economic oilseed crop with rich source of nutritive qualities, was interacted with Piriformospora indica, a unique root colonizing fungus with wide host range and multifunctional aspects. The fungus-treated plants showed a significant increase in agronomic parameters with plant biomass, lodging-resistance, early bolting and flowering, oil yield and quality...
June 2017: Microbiological Research
https://www.readbyqxmd.com/read/28454706/microbial-diversity-of-the-hypersaline-and-lithium-rich-salar-de-uyuni-bolivia
#9
Götz Haferburg, Janosch A D Gröning, Nadja Schmidt, Nicolai-Alexeji Kummer, Juan Carlos Erquicia, Michael Schlömann
Salar de Uyuni, situated in the Southwest of the Bolivian Altiplano, is the largest salt flat on Earth. Brines of this athalassohaline hypersaline environment are rich in lithium and boron. Due to the ever- increasing commodity demand, the industrial exploitation of brines for metal recovery from the world's biggest lithium reservoir is likely to increase substantially in the near future. Studies on the composition of halophilic microbial communities in brines of the salar have not been published yet. Here we report for the first time on the prokaryotic diversity of four brine habitats across the salar...
June 2017: Microbiological Research
https://www.readbyqxmd.com/read/28454705/two-low-complexity-ultra-high-throughput-methods-to-identify-diverse-chemically-bioactive-molecules-using-saccharomyces-cerevisiae
#10
Katarina Petrovic, Martin Pfeifer, Christian N Parker, Sven Schuierer, John Tallarico, Dominic Hoepfner, N Rao Movva, Gunther Scheel, Stephen B Helliwell
The budding yeast S. cerevisiae is widely used as a eukaryotic model organism to elucidate the mechanism of action of low molecular weight compounds. This report describes the development of two high throughput screening methods based on cell viability either by monitoring the reduction of alamarBlue(®) (resazurin) or by direct optical measurement of cell growth. Both methods can be miniaturized to allow screening of large numbers of samples, and can be performed using S. cerevisiae in 384 and 1536-well format...
June 2017: Microbiological Research
https://www.readbyqxmd.com/read/28454704/the-normal-vaginal-and-uterine-bacterial-microbiome-in-giant-pandas-ailuropoda-melanoleuca
#11
Xin Yang, Guangyang Cheng, Caiwu Li, Jiang Yang, Jianan Li, Danyu Chen, Wencheng Zou, SenYan Jin, Hemin Zhang, Desheng Li, Yongguo He, Chengdong Wang, Min Wang, Hongning Wang
While the health effects of the colonization of the reproductive tracts of mammals by bacterial communities are widely known, there is a dearth of knowledge specifically in relation to giant panda microbiomes. In order to investigate the vaginal and uterine bacterial diversity of healthy giant pandas, we used high-throughput sequence analysis of portions of the 16S rRNA gene, based on samples taken from the vaginas (GPV group) and uteri (GPU group) of these animals. Results showed that the four most abundant phyla, which contained in excess of 98% of the total sequences, were Proteobacteria (59...
June 2017: Microbiological Research
https://www.readbyqxmd.com/read/28285663/an-lrr-receptor-kinase-regulates-growth-development-and-pathogenesis-in-phytophthora-capsici
#12
Asma Safdar, Qi Li, Danyu Shen, Linlin Chen, Feng He, Rongbo Wang, Meixiang Zhang, Joseph Juma Mafurah, Sajid Aleem Khan, Daolong Dou
Leucine-rich repeats (LRRs) domain containing kinase proteins (LRR-RK) perform various functions in eukaryotic organisms. However, their functions in Oomycetes are still largely unknown. Here, we identified an LRR-RK (PcLRR-RK1) gene and characterized its functions in Phytophthora capsici, a model oomycete specie and a major plant destroyer of solanaceous and cucurbitaceous vegetable crops. We showed that PcLRR-RK1-silenced P. capsici transformants exhibited reduced growth and produced highly branched fluffy hyphae...
May 2017: Microbiological Research
https://www.readbyqxmd.com/read/28285662/corrigendum-to-cellulolytic-potential-of-probiotic-bacillus-subtilis-ams6-isolated-from-traditional-fermented-soybean-churpi-an-in-vitro-study-with-regards-to-application-as-an-animal-feed-additive-microbiol-res-186-187-2016-62-70
#13
Ajay K Manhar, Yasir Bashir, Devabrata Saikia, Dhrubajyoti Nath, Kuldeep Gupta, Bolin K Konwar, Rahul Kumar, Nima D Namsa, Manabendra Mandal
No abstract text is available yet for this article.
May 2017: Microbiological Research
https://www.readbyqxmd.com/read/28285661/colonization-and-beneficial-effects-on-annual-ryegrass-by-mixed-inoculation-with-plant-growth-promoting-bacteria
#14
Nádia L Castanheira, Ana Catarina Dourado, Isabel Pais, José Semedo, Paula Scotti-Campos, Nuno Borges, Gilda Carvalho, Maria Teresa Barreto Crespo, Paula Fareleira
Multi-strain inoculants have increased potential to accomplish a diversity of plant needs, mainly attributed to its multi-functionality. This work evaluated the ability of a mixture of three bacteria to colonize and induce a beneficial response on the pasture crop annual ryegrass. Pseudomonas G1Dc10 and Paenibacillus G3Ac9 were previously isolated from annual ryegrass and were selected for their ability to perform multiple functions related to plant growth promotion. Sphingomonas azotifigens DSMZ 18530(T) was included due to nitrogen fixing ability...
May 2017: Microbiological Research
https://www.readbyqxmd.com/read/28285660/genetic-and-biochemical-characterization-of-hyicin-3682-the-first-bacteriocin-reported-for-staphylococcus-hyicus
#15
Patrícia Carlin Fagundes, Ilana Nascimento de Sousa Santos, Márcia Silva Francisco, Rodolpho Mattos Albano, Maria do Carmo de Freire Bastos
Hyicin 3682, the first bacteriocin reported for Staphylococcus hyicus, is a BsaCOL variant produced by S. hyicus 3682, a strain isolated from bovine milk. Hyicin 3682 is found in the culture supernatant, is bactericidal and its producing strain exhibits a much broader spectrum of antimicrobial activity than the producing strain of BsaCOL against several Gram-positive bacteria, which include foodborne pathogens, food-spoilage microorganisms and bacterial species of medical and veterinary importance. Sequencing of the genome of S...
May 2017: Microbiological Research
https://www.readbyqxmd.com/read/28285659/candida-albicans-infection-and-intestinal-immunity
#16
REVIEW
Yiqing Tong, Jianguo Tang
Fungal infections cause high rates of morbidity and mortality in intensive care and immunocompromised patients, and can represent a life-threatening disease. As a microorganism commonly found in the intestine, Candida albicans (C. albicans) can invade the gut epithelium barrier via microfold cells and enter the bloodstream. The defensive potential of the intestinal barrier against invasive C. albicans is dependent on innate and adaptive immune responses which enable the host to eliminate pathogenic fungi. The lamina propria layer of the intestine contains numerous immune cells capable of inducing an innate cellular immune response against invasive fungi...
May 2017: Microbiological Research
https://www.readbyqxmd.com/read/28285658/competition-assays-revealed-paenibacillus-pasadenensis-strain-r16-as-a-novel-antifungal-agent
#17
Alessandro Passera, Giovanni Venturini, Giovanna Battelli, Paola Casati, Francesca Penaca, Fabio Quaglino, Piero Attilio Bianco
The development of new sustainable containment strategies of plant diseases is very important to guarantee food security while reducing the environmental impact of agriculture. Research of new biocontrol agents is a long and difficult process that involves several steps that start from the identification of possible candidates which, for example, show antibiotic activities, and ends with in field, large scale trials. In this study, the plant growth promoting potential and antifungal effect exerted by a novel, putative candidate biocontrol agent, strain R16, identified as Paenibacillus pasadenensis by sequence analysis of 16S rRNA and rpoB genes, against three important plant pathogenic fungi (Botrytis cinerea, Fusarium verticillioides, and Phomopsis viticola), were assessed...
May 2017: Microbiological Research
https://www.readbyqxmd.com/read/28285657/two-component-regulatory-system-acts-actr-is-required-for-sinorhizobium-meliloti-adaptation-to-oxidative-stress
#18
Guirong Tang, Sunjun Wang, Dawei Lu, Leqi Huang, Ningning Li, Li Luo
The two-component system ActS/ActR plays important roles in bacterial adaptation to abiotic stress, including acid tolerance and oxidant resistance. However, the underlying regulatory mechanism is not clear. In this study, we found that the ActS/ActR system is required for adaptation to oxidative stress by regulating the transcription of the genes actR, katB, gshA and gshB1. The actS and actR mutants were sensitive to low pH and oxidants such as H2O2, oxidized glutathione (GSSG) and sodium nitroprusside (SNP)...
May 2017: Microbiological Research
https://www.readbyqxmd.com/read/28219529/challenges-and-prospects-of-xylitol-production-with-whole-cell-bio-catalysis-a-review
#19
REVIEW
Diptarka Dasgupta, Sheetal Bandhu, Dilip K Adhikari, Debashish Ghosh
Xylitol, as an alternative low calorie sweetener is well accepted in formulations of various confectioneries and healthcare products. Worldwide it is industrially produced by catalytic hydrogenation of pure d-xylose solution under high temperature and pressure. Biotechnological xylitol production is a potentially attractive replacement for chemical process, as it occurs under much milder process conditions and can be based on sugar mixtures derived from low-cost industrial and agri-waste. However, microbial fermentation route of xylitol production is not so far practiced industrially...
April 2017: Microbiological Research
https://www.readbyqxmd.com/read/28219528/mycobacterium-tuberculosis-rv1987-induces-th2-immune-responses-and-enhances-mycobacterium-smegmatis-survival-in-mice
#20
Shanshan Sha, Xiaoxia Shi, Guoying Deng, Lina Chen, Yi Xin, Yufang Ma
Mycobacterium tuberculosis can interfere with host immune response and escape clearance through its specific antigens. M. tuberculosis Rv1987 encoded by region of difference (RD)-2 gene is a secretory protein with immunogenic potency. Here, we investigated the impact of Rv1987 on host cytokine responses and T cell polarization in mouse aerosol model. A recombinant M. smegmatis mc(2)155 strain that overexpressed Rv1987 protein (named MS1987) was constructed and used to infect C57BL/6 mice. The mc(2)155 harbored the empty vector (named MSVec) was as a control...
April 2017: Microbiological Research
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