keyword
MENU ▼
Read by QxMD icon Read
search

Sinorhizobium

keyword
https://www.readbyqxmd.com/read/28805544/rna-silencing-in-plant-symbiotic-bacteria-insights-from-a-protein-centric-view
#1
José I Jiménez-Zurdo, Marta Robledo
Extensive work in model enterobacteria has evidenced that the RNA chaperone Hfq and several endoribonucleases, such as RNase E or RNase III, serve pivotal roles in small RNA-mediated post-transcriptional silencing of gene expression. Characterization of these protein hubs commonly provide global functional and mechanistic insights into complex sRNA regulatory networks. The legume endosymbiont Sinorhizobium meliloti is a non-classical model bacterium with a very complex lifestyle in which riboregulation is expected to play important adaptive functions...
August 14, 2017: RNA Biology
https://www.readbyqxmd.com/read/28800133/adaptive-evolution-of-rhizobial-symbiotic-compatibility-mediated-by-co-evolved-insertion-sequences
#2
Ran Zhao, Li Xue Liu, Yun Zeng Zhang, Jian Jiao, Wen Jing Cui, Biliang Zhang, Xiao Lin Wang, Meng Lin Li, Yi Chen, Zhu Qing Xiong, Wen Xin Chen, Chang Fu Tian
Mutualism between bacteria and eukaryotes has essential roles in the history of life, but the evolution of their compatibility is poorly understood. Here we show that different Sinorhizobium strains can form either nitrogen-fixing nodules or uninfected pseudonodules on certain cultivated soybeans, while being all effective microsymbionts of some wild soybeans. However, a few well-infected nodules can be found on a commercial soybean using inocula containing a mixed pool of Tn5 insertion mutants derived from an incompatible strain...
August 11, 2017: ISME Journal
https://www.readbyqxmd.com/read/28768212/effects-of-biosolids-from-a-wastewater-treatment-plant-receiving-manufactured-nanomaterials-on-medicago-truncatula-and-associated-soil-microbial-communities-at-low-nanomaterial-concentrations
#3
Chun Chen, Olga V Tsyusko, Dave H McNear, Jonathan Judy, Ricky W Lewis, Jason M Unrine
Concern has grown regarding engineered nanomaterials (ENMs) entering agricultural soils through the application of biosolids and their possible effects on agroecosystems, even though the ENMs are extensively transformed. The effects of exposure to biosolids containing transformation products of these ENMs at low concentrations remain largely unexplored. We examined the responses of Medicago truncatula and its symbiotic rhizobia Sinorhizobium meliloti exposed to soil amended with biosolids from WWTP containing low added concentrations of ENMs (ENM Low), bulk/dissolved metals (bulk/dissolved Low), or no metal additions (control)...
July 30, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28765224/genome-wide-sensitivity-analysis-of-the-microsymbiont-sinorhizobium-meliloti-to-symbiotically-important-defensin-like-host-peptides
#4
Markus F F Arnold, Mohammed Shabab, Jon Penterman, Kevin L Boehme, Joel S Griffitts, Graham C Walker
The model legume species Medicago truncatula expresses more than 700 nodule-specific cysteine-rich (NCR) signaling peptides that mediate the differentiation of Sinorhizobium meliloti bacteria into nitrogen-fixing bacteroids. NCR peptides are essential for a successful symbiosis in legume plants of the inverted-repeat-lacking clade (IRLC) and show similarity to mammalian defensins. In addition to signaling functions, many NCR peptides exhibit antimicrobial activity in vitro and in vivo Bacterial resistance to these antimicrobial activities is likely to be important for symbiosis...
August 1, 2017: MBio
https://www.readbyqxmd.com/read/28756029/tripartite-symbiosis-of-sophora-tomentosa-rhizobia-and-arbuscular-mycorhizal-fungi
#5
Maíra Akemi Toma, Teotonio Soares de Carvalho, Amanda Azarias Guimarães, Elaine Martins da Costa, Jacqueline Savana da Silva, Fatima Maria de Souza Moreira
Sophora tomentosa is a pantropical legume species with potential for recovery of areas degraded by salinization, and for stabilization of sand dunes. However, few studies on this species have been carried out, and none regarding its symbiotic relationship with beneficial soil microorganisms. Therefore, this study aimed to evaluate the diversity of nitrogen-fixing bacteria isolated from nodules of Sophora tomentosa, and to analyze the occurrence of colonization of arbuscular mycorrhizal fungi on the roots of this legume in seafront soil...
June 29, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28745538/sinorhizobium-meliloti-chemotaxis-to-multiple-amino-acids-is-mediated-by-the-chemoreceptor-mcpu
#6
Benjamin A Webb, K Karl Compton, Julia S Martin Del Campo, Doris Taylor, Pablo Sobrado, Birgit E Scharf
The legume symbiont Sinorhizobium meliloti is chemoattracted to compounds exuded by germinating seeds of its host alfalfa. This response is mainly mediated by the S. meliloti chemoreceptor McpU. McpU also has a prominent contribution in sensing a synthetic amino acid (aa) mixture mimicking the amounts and composition observed in seed exudate. Here, we used the hydrogel capillary assay to quantify chemotactic responses of S. meliloti to individual aa exuded by germinating alfalfa seeds and to define the role of McpU in this behavior...
July 26, 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/28744732/medicago-truncatula-oleanolic-derived-saponins-are-correlated-with-caterpillar-deterrence
#7
Fanping Cai, Bonnie S Watson, David Meek, David V Huhman, Daniel J Wherritt, Cecile Ben, Laurent Gentzbittel, Brian T Driscoll, Lloyd W Sumner, Jacqueline C Bede
Plant resistance mechanisms to insect herbivory can potentially be bred into crops as an important strategy for integrated pest management. Medicago truncatula ecotypes inoculated with the rhizobium Ensifer medicae (Sinorhizobium medica) WSM419 were screened for resistance to herbivory by caterpillars of the beet armyworm, Spodoptera exigua, through leaf and whole plant choice studies; TN1.11 and F83005.5 are identified as the least and most deterrent ecotypes, respectively. In response to caterpillar herbivory, both ecotypes mount a robust burst of plant defensive jasmonate phytohormones...
July 25, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28729859/transcriptomic-insight-in-the-control-of-legume-root-secondary-infection-by-the-sinorhizobium-meliloti-transcriptional-regulator-clr
#8
Lan Zou, Amandine Gastebois, Céline Mathieu-Demazière, Fernando Sorroche, Catherine Masson-Boivin, Jacques Batut, Anne-Marie Garnerone
The cAMP-dependent transcriptional regulator Clr of Sinorhizobium meliloti regulates the overall number of infection events on Medicago roots by a so-far unknown mechanism requiring smc02178, a Clr-target gene of unknown function. In order to shed light on the mode of action of Clr on infection and potentially reveal additional biological functions for Clr, we inventoried genomic Clr target genes by transcriptome profiling. We have found that Clr positively controls the synthesis of cAMP-dependent succinoglycan as well as the expression of genes involved in the synthesis of a so-far unknown polysaccharide compound...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28713341/prevalence-host-range-and-comparative-genomic-analysis-of-temperate-ochrobactrum-phages
#9
Claudia Jäckel, Stefan Hertwig, Holger C Scholz, Karsten Nöckler, Jochen Reetz, Jens A Hammerl
Ochrobactrum and Brucella are closely related bacteria that populate different habitats and differ in their pathogenic properties. Only little is known about mobile genetic elements in these genera which might be important for survival and virulence. Previous studies on Brucella lysogeny indicated that active phages are rare in this genus. To gain insight into the presence and nature of prophages in Ochrobactrum, temperate phages were isolated from various species and characterized in detail. In silico analyses disclosed numerous prophages in published Ochrobactrum genomes...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28700717/integrated-analysis-of-zone-specific-protein-and-metabolite-profiles-within-nitrogen-fixing-medicago-truncatula-sinorhizobium-medicae-nodules
#10
Aaron J Ogden, Mahmoud Gargouri, JeongJin Park, David R Gang, Michael L Kahn
Symbiotic nitrogen fixation (SNF) between rhizobia and legumes requires metabolic coordination within specialized root organs called nodules. Nodules formed in the symbiosis between S. medicae and barrel medic (M. truncatula) are indeterminate, cylindrical, and contain spatially distinct developmental zones. Bacteria in the infection zone II (ZII), interzone II-III (IZ), and nitrogen fixation zone III (ZIII) represent different stages in the metabolic progression from free-living bacteria into nitrogen fixing bacteroids...
2017: PloS One
https://www.readbyqxmd.com/read/28686606/plant-fed-versus-chemicals-fed-rhizobacteria-of-lucerne-plant-only-teabags-culture-media-not-only-increase-culturability-of-rhizobacteria-but-also-recover-a-previously-uncultured-lysobacter-sp-novosphingobium-sp-and-pedobacter-sp
#11
Nabil A Hegazi, Mohamed S Sarhan, Mohamed Fayez, Sascha Patz, Brian R Murphy, Silke Ruppel
In an effort to axenically culture the previously uncultivable populations of the rhizobacteria of Lucerne (Medicago sativa L.), we propose plant-only teabags culture media to mimic the nutritional matrix available in the rhizosphere. Here, we show that culture media prepared from Lucerne powder teabags substantially increased the cultivability of Lucerne rhizobacteria compared with a standard nutrient agar, where we found that the cultivable populations significantly increased by up to 60% of the total bacterial numbers as estimated by Quantitative Real-time Polymerase Chain Reaction (qRT-PCR)...
2017: PloS One
https://www.readbyqxmd.com/read/28672885/characterization-of-sinorhizobium-sp-lm21-prophages-and-virus-encoded-dna-methyltransferases-in-the-light-of-comparative-genomic-analyses-of-the-sinorhizobial-virome
#12
Przemyslaw Decewicz, Monika Radlinska, Lukasz Dziewit
The genus Sinorhizobium/Ensifer mostly groups nitrogen-fixing bacteria that create root or stem nodules on leguminous plants and transform atmospheric nitrogen into ammonia, which improves the productivity of the plants. Although these biotechnologically-important bacteria are commonly found in various soil environments, little is known about their phages. In this study, the genome of Sinorhizobium sp. LM21 isolated from a heavy-metal-contaminated copper mine in Poland was investigated for the presence of prophages and DNA methyltransferase-encoding genes...
June 26, 2017: Viruses
https://www.readbyqxmd.com/read/28647122/effect-of-succinate-on-phosphate-solubilization-in-nitrogen-fixing-bacteria-harbouring-chick-pea-and-their-effect-on-plant-growth
#13
Bhagya Iyer, Mahendrapal Singh Rajput, Shalini Rajkumar
Diverse nitrogen fixing bacteria harbouring chick pea rhizosphere and root nodules were tested for multiple plant growth promoting traits like tricalcium phosphate (TCP) and rock phosphate (RP) solubilization, production of ammonia, indole 3-acetic acid, chitinase, phytase and alkaline phosphatase. Isolates belonged to diverse genus like Enterobacter, Acinetobacter, Erwinia, Pseudomonas, Rhizobium, Sinorhizobium, Ensifer, Klebsiella, etc. Most isolates solubilized TCP and RP along with the lowering of media pH, indicating acidification to be the chief mechanism behind this solubilization...
September 2017: Microbiological Research
https://www.readbyqxmd.com/read/28643473/can-the-propensity-of-protein-crystallization-be-increased-by-using-systematic-screening-with-metals
#14
REVIEW
Raghurama P Hegde, Pavithra G Chinnaswamy, Debayan Dey, Steven C Almo, S Ramakumar, Udupi A Ramagopal
Protein crystallization is one of the major bottlenecks in protein structure elucidation with new strategies being constantly developed to improve the chances of crystallization. Generally, well-ordered epitopes possessing complementary-surface and capable of producing stable inter-protein interactions generate a regular three-dimensional arrangement of protein molecules which eventually results in a crystal lattice. Metals, when used for crystallization, with their various coordination numbers and geometries, can generate such epitopes mediating protein oligomerization and/or establish crystal contacts...
June 23, 2017: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/28611764/interplay-of-pathogen-induced-defense-responses-and-symbiotic-establishment-in-medicago-truncatula
#15
Tao Chen, Liujian Duan, Bo Zhou, Haixiang Yu, Hui Zhu, Yangrong Cao, Zhongming Zhang
Suppression of host innate immunity appears to be required for the establishment of symbiosis between rhizobia and host plants. In this study, we established a system that included a host plant, a bacterial pathogen and a symbiotic rhizobium to study the role of innate immunity during symbiotic interactions. A pathogenic bacterium, Pseudomonas syringae pv. tomato strain DC3000 (Pst DC3000), was shown to cause chlorosis in Medicago truncatula A17. Sinorhizobium meliloti strain Sm2011 (Sm2011) and Pst DC3000 strain alone induced similar defense responses in M...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28607058/host-secreted-antimicrobial-peptide-enforces-symbiotic-selectivity-in-medicago-truncatula
#16
Qi Wang, Shengming Yang, Jinge Liu, Kata Terecskei, Edit Ábrahám, Anikó Gombár, Ágota Domonkos, Attila Szűcs, Péter Körmöczi, Ting Wang, Lili Fodor, Linyong Mao, Zhangjun Fei, Éva Kondorosi, Péter Kaló, Attila Kereszt, Hongyan Zhu
Legumes engage in root nodule symbioses with nitrogen-fixing soil bacteria known as rhizobia. In nodule cells, bacteria are enclosed in membrane-bound vesicles called symbiosomes and differentiate into bacteroids that are capable of converting atmospheric nitrogen into ammonia. Bacteroid differentiation and prolonged intracellular survival are essential for development of functional nodules. However, in the Medicago truncatula-Sinorhizobium meliloti symbiosis, incompatibility between symbiotic partners frequently occurs, leading to the formation of infected nodules defective in nitrogen fixation (Fix(-))...
June 27, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28607056/microsymbiont-discrimination-mediated-by-a-host-secreted-peptide-in-medicago-truncatula
#17
Shengming Yang, Qi Wang, Elena Fedorova, Jinge Liu, Qiulin Qin, Qiaolin Zheng, Paul A Price, Huairong Pan, Dong Wang, Joel S Griffitts, Ton Bisseling, Hongyan Zhu
The legume-rhizobial symbiosis results in the formation of root nodules that provide an ecological niche for nitrogen-fixing bacteria. However, plant-bacteria genotypic interactions can lead to wide variation in nitrogen fixation efficiency, and it is not uncommon that a bacterial strain forms functional (Fix(+)) nodules on one plant genotype but nonfunctional (Fix(-)) nodules on another. Host genetic control of this specificity is unknown. We herein report the cloning of the Medicago truncatula NFS1 gene that regulates the fixation-level incompatibility with the microsymbiont Sinorhizobium meliloti Rm41...
June 27, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28559882/bacterial-root-microbiome-of-plants-growing-in-oil-sands-reclamation-covers
#18
Eduardo K Mitter, J Renato de Freitas, James J Germida
Oil sands mining in northern Alberta impacts a large footprint, but the industry is committed to reclaim all disturbed land to an ecologically healthy state in response to environmental regulations. However, these newly reconstructed landscapes may be limited by several factors that include low soil nutrient levels and reduced microbial activity. Rhizosphere microorganisms colonize plant roots providing hosts with nutrients, stimulating growth, suppressing disease and increasing tolerance to abiotic stress...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28559336/arac-like-transcriptional-activator-cuxr-binds-c-di-gmp-by-a-pilz-like-mechanism-to-regulate-extracellular-polysaccharide-production
#19
Simon Schäper, Wieland Steinchen, Elizaveta Krol, Florian Altegoer, Dorota Skotnicka, Lotte Søgaard-Andersen, Gert Bange, Anke Becker
Cyclic dimeric GMP (c-di-GMP) has emerged as a key regulatory player in the transition between planktonic and sedentary biofilm-associated bacterial lifestyles. It controls a multitude of processes including production of extracellular polysaccharides (EPSs). The PilZ domain, consisting of an N-terminal "RxxxR" motif and a β-barrel domain, represents a prototype c-di-GMP receptor. We identified a class of c-di-GMP-responsive proteins, represented by the AraC-like transcription factor CuxR in plant symbiotic α-proteobacteria...
June 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28461447/bacterial-pero-permeases-transport-sulfate-and-related-oxyanions
#20
Marie-Christine Hoffmann, Yvonne Pfänder, Marc Tintel, Bernd Masepohl
Rhodobacter capsulatus synthesizes the high-affinity ABC transporters CysTWA and ModABC to specifically import the chemically related oxyanions sulfate and molybdate, respectively. In addition, R. capsulatus has the low-affinity permease PerO acting as a general oxyanion transporter, whose elimination increases tolerance to molybdate and tungstate. Although PerO-like permeases are widespread in bacteria, their function has not been examined in any other species to date. Here, we present evidence that PerO permeases from the alphaproteobacteria Agrobacterium tumefaciens, Dinoroseobacter shibae, Rhodobacter sphaeroides, and Sinorhizobium meliloti and the gammaproteobacterium Pseudomonas stutzeri functionally substitute for R...
July 15, 2017: Journal of Bacteriology
keyword
keyword
19550
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"