keyword
MENU ▼
Read by QxMD icon Read
search

Root nodule bacteria

keyword
https://www.readbyqxmd.com/read/28401641/a-conserved-%C3%AE-proteobacterial-small-rna-contributes-to-osmoadaptation-and-symbiotic-efficiency-of-rhizobia-on-legume-roots
#1
Marta Robledo, Alexandra Peregrina, Vicenta Millán, Natalia I García-Tomsig, Omar Torres-Quesada, Pedro F Mateos, Anke Becker, José I Jiménez-Zurdo
Small non-coding RNAs (sRNAs) are expected to have pivotal roles in the adaptive responses underlying symbiosis of nitrogen-fixing rhizobia with legumes. Here, we provide primary insights into the function and activity mechanism of the Sinorhizobium meliloti trans-sRNA NfeR1 (Nodule Formation Efficiency RNA). Northern blot probing and transcription tracking with fluorescent promoter-reporter fusions unveiled high nfeR1 expression in response to salt stress and throughout the symbiotic interaction. The strength and differential regulation of nfeR1 transcription are conferred by a motif, which is conserved in nfeR1 promoter regions in α-proteobacteria...
April 12, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28394446/laser-ablation-electrospray-ionization-mass-spectrometry-with-ion-mobility-separation-reveals-metabolites-in-the-symbiotic-interactions-of-soybean-roots-and-rhizobia
#2
Sylwia A Stopka, Beverly J Agtuca, David W Koppenaal, Ljiljana Paša-Tolić, Gary Stacey, Akos Vertes, Christopher R Anderton
Technologies enabling in situ metabolic profiling of living plant systems are invaluable for understanding physiological processes and could be used for rapid phenotypic screening (e.g., to produce plants with superior biological nitrogen fixing ability). The symbiotic interaction between legumes and nitrogen-fixing soil bacteria results in a specialized plant organ (i.e., root nodule) where the exchange of nutrients between host and endosymbiont occurs. Laser ablation electrospray ionization mass spectrometry (LAESI-MS) is a method that can be performed under ambient conditions requiring minimal sample preparation...
April 10, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28386665/agrobacterium-deltaense-sp-nov-an-endophytic-bacteria-isolated-from-nodule-of-sesbania-cannabina
#3
Jun Yan, Yan Li, Xiao Zeng Han, Wen Feng Chen, Wen Xiu Zou, Zhihong Xie, Meng Li
A Gram-negative, non-spore-forming, aerobic rods, strain YIC4121(T), was isolated from root nodule of Sesbania cannabina grown in Dongying (Yellow River Delta), Shandong Province, PR China. Based on phylogenetic analysis of 16 S rRNA gene sequences, strain YIC4121(T) was assigned to the genus Agrobacterium with 99.7, 99.3, 99.0, 98.8 and 98.7% sequence similarities to Agrobacterium radiobacter LMG140(T), A. pusense NRCPB10(T), A. arsenijevicii KFB 330(T), A. nepotum 39/7(T) and A. larrymoorei ATCC51759(T)...
April 6, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28376308/differential-colonization-by-bioprospected-rhizobial-bacteria-associated-to-common-bean-in-different-cropping-systems-i-i
#4
Josiele Polzin de Oliveira-Francesquini, Mariangela Hungria, Daiani Cristina Savi, Chirlei Glienke, Rodrigo Aluizio, Vanessa Kava, Lygia Vitória Galli-Terasawa
In this study, we evaluated the diversity of rhizobia isolated from root nodules on common bean (<i>Phaseolus vulgaris</i>) derived from Andean and Mesoamerican centers and grown under field and greenhouse conditions. Genetic characterization of isolates was performed by sequencing analyses of the 16S rRNA and two housekeeping genes, <i>rec</i>A and <i>gln</i>II, and by the amplification of <i>nif</i>H. Symbiotic efficiency was evaluated by examining nodulation, plant-biomass production and plant-N accumulation...
April 4, 2017: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/28369229/legume-rhizobium-symbiotic-promiscuity-and-effectiveness-do-not-affect-plant-invasiveness
#5
Jan-Hendrik Keet, Allan G Ellis, Cang Hui, Johannes J Le Roux
Background and Aims: The ability to fix atmospheric nitrogen is thought to play an important role in the invasion success of legumes. Interactions between legumes and nitrogen-fixing bacteria (rhizobia) span a continuum of specialization, and promiscuous legumes are thought to have higher chances of forming effective symbioses in novel ranges. Using Australian Acacia species in South Africa, it was hypothesized that widespread and highly invasive species will be more generalist in their rhizobial symbiotic requirements and more effective in fixing atmospheric nitrogen compared with localized and less invasive species...
March 28, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28346361/specificity-in-legume-rhizobia-symbioses
#6
REVIEW
Mitchell Andrews, Morag E Andrews
Most species in the Leguminosae (legume family) can fix atmospheric nitrogen (N₂) via symbiotic bacteria (rhizobia) in root nodules. Here, the literature on legume-rhizobia symbioses in field soils was reviewed and genotypically characterised rhizobia related to the taxonomy of the legumes from which they were isolated. The Leguminosae was divided into three sub-families, the Caesalpinioideae, Mimosoideae and Papilionoideae. Bradyrhizobium spp. were the exclusive rhizobial symbionts of species in the Caesalpinioideae, but data are limited...
March 26, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28270909/high-quality-permanent-draft-genome-sequence-of-the-bradyrhizobium-elkanii-type-strain-usda-76-t-isolated-from-glycine-max-l-merr
#7
Wayne Reeve, Peter van Berkum, Julie Ardley, Rui Tian, Margaret Gollagher, Dora Marinova, Patrick Elia, T B K Reddy, Manoj Pillay, Neha Varghese, Rekha Seshadri, Natalia Ivanova, Tanja Woyke, Mohamed N Baeshen, Nabih A Baeshen, Nikos Kyrpides
Bradyrhizobium elkanii USDA 76(T) (INSCD = ARAG00000000), the type strain for Bradyrhizobium elkanii, is an aerobic, motile, Gram-negative, non-spore-forming rod that was isolated from an effective nitrogen-fixing root nodule of Glycine max (L. Merr) grown in the USA. Because of its significance as a microsymbiont of this economically important legume, B. elkanii USDA 76(T) was selected as part of the DOE Joint Genome Institute 2010 Genomic Encyclopedia for Bacteria and Archaea-Root Nodule Bacteria sequencing project...
2017: Standards in Genomic Sciences
https://www.readbyqxmd.com/read/28265280/interface-symbiotic-membrane-formation-in-root-nodules-of-medicago-truncatula-the-role-of-synaptotagmins-mtsyt1-mtsyt2-and-mtsyt3
#8
Aleksandr Gavrin, Olga Kulikova, Ton Bisseling, Elena E Fedorova
Symbiotic bacteria (rhizobia) are maintained and conditioned to fix atmospheric nitrogen in infected cells of legume root nodules. Rhizobia are confined to the asymmetrical protrusions of plasma membrane (PM): infection threads (IT), cell wall-free unwalled droplets and symbiosomes. These compartments rapidly increase in surface and volume due to the microsymbiont expansion, and remarkably, the membrane resources of the host cells are targeted to interface membrane quite precisely. We hypothesized that the change in the membrane tension around the expanding microsymbionts creates a vector for membrane traffic toward the symbiotic interface...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28255691/the-naringenin-induced-exoproteome-of-rhizobium-etli-ce3
#9
Niurka Meneses, Hermenegildo Taboada, Michael F Dunn, María Del Carmen Vargas, Natasha Buchs, Manfred Heller, Sergio Encarnación
Flavonoids excreted by legume roots induce the expression of symbiotically essential nodulation (nod) genes in rhizobia, as well as that of specific protein export systems. In the bean microsymbiont Rhizobium etli CE3, nod genes are induced by the flavonoid naringenin. In this study, we identified 693 proteins in the exoproteome of strain CE3 grown in minimal medium with or without naringenin, with 101 and 100 exoproteins being exclusive to these conditions, respectively. Four hundred ninety-two (71%) of the extracellular proteins were found in both cultures...
March 2, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28230048/differential-regulation-of-the-epr3-receptor-coordinates-membrane-restricted-rhizobial-colonization-of-root-nodule-primordia
#10
Yasuyuki Kawaharada, Mette W Nielsen, Simon Kelly, Euan K James, Kasper R Andersen, Sheena R Rasmussen, Winnie Füchtbauer, Lene H Madsen, Anne B Heckmann, Simona Radutoiu, Jens Stougaard
In Lotus japonicus, a LysM receptor kinase, EPR3, distinguishes compatible and incompatible rhizobial exopolysaccharides at the epidermis. However, the role of this recognition system in bacterial colonization of the root interior is unknown. Here we show that EPR3 advances the intracellular infection mechanism that mediates infection thread invasion of the root cortex and nodule primordia. At the cellular level, Epr3 expression delineates progression of infection threads into nodule primordia and cortical infection thread formation is impaired in epr3 mutants...
February 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28224000/co-inoculation-effect-of-rhizobia-and-plant-growth-promoting-rhizobacteria-on-common-bean-growth-in-a-low-phosphorus-soil
#11
Hezekiah Korir, Nancy W Mungai, Moses Thuita, Yosef Hamba, Cargele Masso
Nitrogen (N) fixation through legume-Rhizobium symbiosis is important for enhancing agricultural productivity and is therefore of great economic interest. Growing evidence indicates that other soil beneficial bacteria can positively affect symbiotic performance of rhizobia. Nodule endophytic plant growth promoting rhizobacteria (PGPR) were isolated from common bean nodules from Nakuru County in Kenya and characterized 16S rDNA partial gene sequencing. The effect of co-inoculation of rhizobium and PGPR, on nodulation and growth of common bean (Phaseolus vulgaris L...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28220509/a-novel-symbiovar-aegeanense-of-the-genus-ensifer-nodulates-vigna-unguiculata
#12
Anastasia P Tampakaki, Christos T Fotiadis, Georgia Ntatsi, Dimitrios Savvas
BACKGROUND: Cowpea (Vigna unguiculata) forms nitrogen-fixing root nodules with diverse symbiotic bacteria, mainly slow-growing rhizobial species belonging to the genus Bradyrhizobium, although few studies have reported the isolation of fast-growing rhizobia under laboratory and field conditions. Despite that much research has been done on cowpea-nodulating bacteria in various countries around the world, very limited information is available on cowpea rhizobia in European soils. The aim of this study was to study the genetic and phenotypic diversity of indigenous cowpea-nodulating rhizobia in Greece...
February 21, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28197135/cloning-and-characterization-of-the-autoinducer-synthase-gene-from-lipid-degrading-bacterium-cedecea-neteri
#13
Kian-Hin Tan, Kah-Yan How, Jia-Yi Tan, Wai-Fong Yin, Kok-Gan Chan
The process of intercellular communication among bacteria, termed quorum sensing (QS), is mediated by small diffusible molecules known as the autoinducers. QS allows the population to react to the change of cell density in unison, in processes such as biofilm formation, plasmid conjugation, virulence, motility and root nodulation. In Gram-negative proteobacteria, N-acyl homoserine lactone (AHL) is the common "language" to coordinate gene expression. This signaling molecule is usually synthesized by LuxI-type proteins...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28194158/role-and-regulation-of-acc-deaminase-gene-in-sinorhizobium-meliloti-is-it-a-symbiotic-rhizospheric-or-endophytic-gene
#14
Alice Checcucci, Elisa Azzarello, Marco Bazzicalupo, Anna De Carlo, Giovanni Emiliani, Stefano Mancuso, Giulia Spini, Carlo Viti, Alessio Mengoni
Plant-associated bacteria exhibit a number of different strategies and specific genes allow bacteria to communicate and metabolically interact with plant tissues. Among the genes found in the genomes of plant-associated bacteria, the gene encoding the enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase (acdS) is one of the most diffused. This gene is supposed to be involved in the cleaving of plant-produced ACC, the precursor of the plant stress-hormone ethylene toning down the plant response to infection...
2017: Frontiers in Genetics
https://www.readbyqxmd.com/read/28180951/bradyrhizobium-centrolobii-and-bradyrhizobium-macuxiense-sp-nov-isolated-from-centrolobium-paraense-grown-in-soil-of-amazonia-brazil
#15
Daniele C Michel, Samuel R Passos, Jean L Simões-Araujo, Alexandre C Baraúna, Krisle da Silva, Marcia M Parma, Itamar S Melo, Sofie E De Meyer, Graham O'Hara, Jerri E Zilli
Thirteen Gram-negative, aerobic, motile with polar flagella, rod-shaped bacteria were isolated from root nodules of Centrolobium paraense Tul. grown in soils from the Amazon region of Brazil. Growth of strains was observed at temperature range 20-36 °C (optimal 28 °C), pH ranges 5-11 (optimal 6.0-7.0), and 0.1-0.5%NaCl (optimal 0.1-0.3%). Analysis of 16S rRNA gene placed the strains into two groups within Bradyrhizobium. Closest neighbouring species (98.8%) for group I was B. neotropicale while for group II were 12 species with more than 99% of similarity...
February 8, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28167938/comparative-analysis-of-the-bacterial-membrane-disruption-effect-of-two-natural-plant-antimicrobial-peptides
#16
Attila Farkas, Gergely Maróti, Attila Kereszt, Éva Kondorosi
In the Medicago truncatula genome about 700 genes code for nodule-specific cysteine-rich (NCR) small peptides that are expressed in the symbiotic organ, the root nodule, where they control terminal differentiation of the endosymbiotic rhizobium bacteria to nitrogen-fixing bacteroids. Cationic NCR peptides were predicted to have antimicrobial activities. Here antibacterial activities of NCR247, NCR335, polymyxin B (PMB), and streptomycin were investigated and compared on two foodborne pathogens Salmonella enterica and Listeria monocytogenes as representatives of Gram-negative and Gram-positive bacteria...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28163823/draft-genome-sequence-of-type-strain-hbr26-t-and-description-of-rhizobium-aethiopicum-sp-nov
#17
Aregu Amsalu Aserse, Tanja Woyke, Nikos C Kyrpides, William B Whitman, Kristina Lindström
Rhizobium aethiopicum sp. nov. is a newly proposed species within the genus Rhizobium. This species includes six rhizobial strains; which were isolated from root nodules of the legume plant Phaseolus vulgaris growing in soils of Ethiopia. The species fixes nitrogen effectively in symbiosis with the host plant P. vulgaris, and is composed of aerobic, Gram-negative staining, rod-shaped bacteria. The genome of type strain HBR26(T) of R. aethiopicum sp. nov. was one of the rhizobial genomes sequenced as a part of the DOE JGI 2014 Genomic Encyclopedia project designed for soil and plant-associated and newly described type strains...
2017: Standards in Genomic Sciences
https://www.readbyqxmd.com/read/28116041/high-quality-draft-genome-sequence-of-rhizobium-mesoamericanum-strain-stm6155-a-mimosa-pudica-microsymbiont-from-new-caledonia
#18
Agnieszka Klonowska, Aline López-López, Lionel Moulin, Julie Ardley, Margaret Gollagher, Dora Marinova, Rui Tian, Marcel Huntemann, T B K Reddy, Neha Varghese, Tanja Woyke, Victor Markowitz, Natalia Ivanova, Rekha Seshadri, Mohamed N Baeshen, Nabih A Baeshen, Nikos Kyrpides, Wayne Reeve
Rhizobium mesoamericanum STM6155 (INSCD = ATYY01000000) is an aerobic, motile, Gram-negative, non-spore-forming rod that can exist as a soil saprophyte or as an effective nitrogen fixing microsymbiont of the legume Mimosa pudica L.. STM6155 was isolated in 2009 from a nodule of the trap host M. pudica grown in nickel-rich soil collected near Mont Dore, New Caledonia. R. mesoamericanum STM6155 was selected as part of the DOE Joint Genome Institute 2010 Genomic Encyclopedia for Bacteria and Archaea-Root Nodule Bacteria (GEBA-RNB) genome sequencing project...
2017: Standards in Genomic Sciences
https://www.readbyqxmd.com/read/28095877/deciphering-composition-and-function-of-the-root-microbiome-of-a-legume-plant
#19
Kyle Hartman, Marcel Ga van der Heijden, Valexia Roussely-Provent, Jean-Claude Walser, Klaus Schlaeppi
BACKGROUND: Diverse assemblages of microbes colonize plant roots and collectively function as a microbiome. Earlier work has characterized the root microbiomes of numerous plant species, but little information is available for legumes despite their key role in numerous ecosystems including agricultural systems. Legumes form a root nodule symbiosis with nitrogen-fixing Rhizobia bacteria and thereby account for large, natural nitrogen inputs into soils. Here, we describe the root bacteria microbiome of the legume Trifolium pratense combining culture-dependent and independent methods...
January 17, 2017: Microbiome
https://www.readbyqxmd.com/read/28074430/the-monomeric-gtpase-raba2-is-required-for-progression-and-maintenance-of-membrane-integrity-of-infection-threads-during-root-nodule-symbiosis
#20
Virginia Dalla Via, Soledad Traubenik, Claudio Rivero, O Mario Aguilar, María Eugenia Zanetti, Flavio Antonio Blanco
Progression of the infection canal that conducts rhizobia to the nodule primordium requires a functional Rab GTPase located in Golgi/trans-Golgi that also participate in root hair polar growth. Common bean (Phaseolus vulgaris) symbiotically associates with its partner Rhizobium etli, resulting in the formation of root nitrogen-fixing nodules. Compatible bacteria can reach cortical cells in a tightly regulated infection process, in which the specific recognition of signal molecules is a key step to select the symbiotic partner...
April 2017: Plant Molecular Biology
keyword
keyword
19548
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"