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https://www.readbyqxmd.com/read/28230048/differential-regulation-of-the-epr3-receptor-coordinates-membrane-restricted-rhizobial-colonization-of-root-nodule-primordia
#1
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/28229543/developmental-trajectories-of-amphibian-microbiota-response-to-bacterial-therapy-depends-on-initial-community-structure
#2
Leyla R Davis, Laurent Bigler, Douglas C Woodhams
Improving host health through microbial manipulation requires untangling factors that shape the microbiome. There is currently little understanding of how initial community structure may drive the microbiota trajectory across host development or influence bacterial therapy. Probiotic baths of surface symbionts, Pseudomonas fluorescens and Flavobacterium johnsoniae were administered to 240 tadpoles of the midwife toad, Alytes obstetricans in semi-natural outdoor mesocosms originating from geographically and genetically distinct populations in Switzerland...
February 22, 2017: Environmental Microbiology
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
#3
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/28223991/the-comparison-of-expressed-candidate-secreted-proteins-from-two-arbuscular-mycorrhizal-fungi-unravels-common-and-specific-molecular-tools-to-invade-different-host-plants
#4
Laurent Kamel, Nianwu Tang, Mathilde Malbreil, Hélène San Clemente, Morgane Le Marquer, Christophe Roux, Nicolas Frei Dit Frey
Arbuscular mycorrhizal fungi (AMF), belonging to the fungal phylum Glomeromycota, form mutualistic symbioses with roots of almost 80% of land plants. The release of genomic data from the ubiquitous AMF Rhizophagus irregularis revealed that this species possesses a large set of putative secreted proteins (RiSPs) that could be of major importance for establishing the symbiosis. In the present study, we aimed to identify SPs involved in the establishment of AM symbiosis based on comparative gene expression analyses...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28222700/quantitative-evaluation-of-protocorm-growth-and-fungal-colonization-in-bletilla-striata-orchidaceae-reveals-less-productive-symbiosis-with-a-non-native-symbiotic-fungus
#5
Tatsuki Yamamoto, Chihiro Miura, Masako Fuji, Shotaro Nagata, Yuria Otani, Takahiro Yagame, Masahide Yamato, Hironori Kaminaka
BACKGROUND: In nature, orchid plants depend completely on symbiotic fungi for their nutrition at the germination and the subsequent seedling (protocorm) stages. However, only limited quantitative methods for evaluating the orchid-fungus interactions at the protocorm stage are currently available, which greatly constrains our understanding of the symbiosis. Here, we aimed to improve and integrate quantitative evaluations of the growth and fungal colonization in the protocorms of a terrestrial orchid, Blettila striata, growing on a plate medium...
February 21, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28221153/ultra-mini-pnl-ump-material-indications-technique-advantages-and-results
#6
Janak D Desai
Stone disease has afflicted mankind since centuries; records from ancient civilisations of India and Egypt have shown stones in human bodies. The scientific mind of humans has always made smart endeavours to remove the kidney stones. From large instruments made like the beaks of different animals and birds in 600 BC (Indian civilisation) to extremely sophisticated and miniaturised endoscopic intruments of today the human race has travelled a long way. The theme has always been to remove the stones with minimal morbidity and mortality and with minimum pain to the patient...
January 2017: Archivos Españoles de Urología
https://www.readbyqxmd.com/read/28219759/reevaluating-species-number-distribution-and-endemism-of-the-coral-genus-pocillopora-lamarck-1816-using-species-delimitation-methods-and-microsatellites
#7
P Gélin, B Postaire, C Fauvelot, H Magalon
Species delimitation methods based on genetic information, notably using single locus data, have been proposed as means of increasing the rate of biodiversity description, but can also be used to clarify complex taxonomies. In this study, we explore the species diversity within the cnidarian genus Pocillopora, widely distributed in the tropical belt of the Indo-Pacific Ocean. From 943 Pocillopora colonies sampled in the Western Indian Ocean, the Tropical Southwestern Pacific and Southeast Polynesia, representing a huge variety of morphotypes, we delineated Primary Species Hypotheses (PSH) applying the Automatic Barcode Gap Discovery method, the Poisson tree processes algorithm and the Generalized mixed Yule-coalescent model on two mitochondrial markers (Open Reading Frame and Dloop) and reconstructing a haploweb using one nuclear marker (Internal Transcribed Spacer 2)...
February 17, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28216337/identification-and-gene-expression-of-multiple-peptidoglycan-recognition-proteins-pgrps-in-the-deep-sea-mussel-bathymodiolus-azoricus-involvement-in-symbiosis
#8
Camille Détrée, François H Lallier, Arnaud Tanguy, Jean Mary
The relationship between the deep-sea mussel Bathymodiolus azoricus and its thiotrophic (SOX) and methanotrophic (MOX) symbionts has been ecologically and functionally well studied. Endosymbiosis is common in deep-sea hydrothermal vent fauna, yet little is known about the molecular mechanisms underlying the regulation of interactions between host and symbionts. In this study we focused on a group of pattern recognition receptors (PRR), called PGRPs that are able to recognize the peptidoglycan of bacterial cell wall...
February 12, 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28214450/in-silico-structural-and-functional-analysis-of-mesorhizobium-acc-deaminase
#9
Krishnendu Pramanik, Tithi Soren, Soumik Mitra, Tushar Kanti Maiti
Nodulation is one of the very important processes of legume plants as it is the initiating event of fixing nitrogen. Although ethylene has essential role in normal plant metabolism but it has also negative impact on plants particularly in nodule formation in legume plants. It is also produced due to a variety of biotic or abiotic stresses. 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase is a rhizobial enzyme which cleaves ACC (immediate precursor of ethylene) into α-ketobutyrate and ammonia. As a result, the level of ethylene from the plant cells is decreased and the negative impact of ethylene on nodule formation is reduced...
February 11, 2017: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/28214191/potential-of-different-am-fungi-native-from-as-contaminated-and-uncontaminated-soils-for-supporting-leucaena-leucocephala-growth-in-as-contaminated-soil
#10
Jerusa Schneider, Jochen Bundschuh, Wesley de Melo Rangel, Luiz Roberto Guimarães Guilherme
Arbuscular mycorrhizal (AM) fungi inoculation is considered a potential biotechnological tool for an eco-friendly remediation of hazardous contaminants. However, the mechanisms explaining how AM fungi attenuate the phytotoxicity of metal(oid)s, in particular arsenic (As), are still not fully understood. The influence of As on plant growth and the antioxidant system was studied in Leucaena leucocephala plants inoculated with different isolates of AM fungi and exposed to increasing concentrations of As (0, 35, and 75 mg dm(-3)) in a Typic Quartzipsamment soil...
February 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28214118/optimizing-peri-urban-ecosystems-pure-to-re-couple-urban-rural-symbiosis
#11
REVIEW
Yong-Guan Zhu, Brian J Reid, Andrew A Meharg, Steve A Banwart, Bo-Jie Fu
Globally, rapid urbanization, along with economic development, is dramatically changing the balance of biogeochemical cycles, impacting upon ecosystem services and impinging on United Nation global sustainability goals (inter alia: sustainable cities and communities; responsible consumption and production; good health and well-being; clean water and sanitation, and; to protect and conserve life on land and below water). A key feature of the urban ecosystems is that nutrient stocks, carbon (C), nitrogen (N) and phosphorus (P), are being enriched...
February 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28214058/phylogenetic-multilocus-sequence-analysis-of-indigenous-slow-growing-rhizobia-nodulating-cowpea-vigna-unguiculata-l-in-greece
#12
Anastasia P Tampakaki, Christos T Fotiadis, Georgia Ntatsi, Dimitrios Savvas
Cowpea (Vigna unguiculata) is a promiscuous grain legume, capable of establishing efficient symbiosis with diverse symbiotic bacteria, mainly slow-growing rhizobial species belonging to the genus Bradyrhizobium. Although much research has been done on cowpea-nodulating bacteria in various countries around the world, little is known about the genetic and symbiotic diversity of indigenous cowpea rhizobia in European soils. In the present study, the genetic and symbiotic diversity of indigenous rhizobia isolated from field-grown cowpea nodules in three geographically different Greek regions were studied...
February 2, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28213330/drug-discovery-strategies-in-the-field-of-tumor-energy-metabolism-limitations-by-metabolic-flexibility-and-metabolic-resistance-to-chemotherapy
#13
REVIEW
N D Amoedo, E Obre, R Rossignol
The search for new drugs capable of blocking the metabolic vulnerabilities of human tumors has now entered the clinical evaluation stage, but several projects already failed in phase I or phase II. In particular, very promising in vitro studies could not be translated in vivo at preclinical stage and beyond. This was the case for most glycolysis inhibitors that demonstrated systemic toxicity. A more recent example is the inhibition of glutamine catabolism in lung adenocarcinoma that failed in vivo despite a strong addiction of several cancer cell lines to glutamine in vitro...
February 14, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28196466/the-transcriptional-landscape-of-basidiosporogenesis-in-mature-pisolithus-microcarpus-basidiocarp
#14
Maíra de Freitas Pereira, André Narvaes da Rocha Campos, Thalita Cardoso Anastacio, Emmanuelle Morin, Sérgio Hermínio Brommonschenkel, Francis Martin, Annegret Kohler, Maurício Dutra Costa
BACKGROUND: Pisolithus microcarpus (Cooke & Massee) G. Cunn is a gasteromycete that produces closed basidiocarps in symbiosis with eucalypts and acacias. The fungus produces a complex basidiocarp composed of peridioles at different developmental stages and an upper layer of basidiospores free of the hyphae and ready for wind dispersal upon the rupture of the basidiocarp pellis. During basidiosporogenesis, a process that takes place inside the basidiocarp peridioles, a conspicuous reserve of fatty acids is present throughout development...
February 14, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28193479/effects-of-substrate-ant-and-fungal-species-on-plant-fiber-degradation-in-a-fungus-gardening-ant-symbiosis
#15
Alexandria M DeMilto, Monte Rouquette, Ulrich G Mueller, Katrin Kellner, Jon N Seal
Fungus-gardening or attine ants have outsourced most of their digestive function to a symbiotic fungus. The ants feed their fungus - essentially an external digestive organ - a variety of substrates of botanical origin, including fresh and dried flowers, leaves and insect frass (processed leaves). Although plant tissues are rich in fibers (lignocelluloses, hemicelluloses, pectins and starches) and the symbiotic fungus possesses the genetic and enzymatic machinery to metabolize these compounds, the highly derived attines, the leaf-cutters (Atta and Acromyrmex), are known to produce fiber-rich waste...
February 11, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28188662/population-genetics-of-reef-coral-endosymbionts-symbiodinium-dinophyceae
#16
D J Thornhill, E J Howells, D C Wham, T D Steury, S R Santos
Symbiodinium is a diverse genus of unicellular dinoflagellate symbionts associating with various marine protists and invertebrates. Although the broad-scale diversity and phylogenetics of the Symbiodinium complex is well established, there have been surprisingly few data on fine-scale population structure and biogeography of these dinoflagellates. Yet population level processes contribute strongly to the biology of Symbiodinium, including how anthropogenic-driven global climate change impacts these symbionts and their host associations...
February 11, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28186629/evolutionary-asymmetry-in-the-arbuscular-mycorrhizal-symbiosis-conservatism-in-fungal-morphology-does-not-predict-host-plant-growth
#17
Alexander M Koch, Pedro M Antunes, Hafiz Maherali, Miranda M Hart, John N Klironomos
Although arbuscular mycorrhizal (AM) fungi are obligate symbionts that can influence plant growth, the magnitude and direction of these effects are highly variable within fungal genera and even among isolates within species, as well as among plant taxa. To determine whether variability in AM fungal morphology and growth is correlated with AM fungal effects on plant growth, we established a common garden experiment with 56 AM fungal isolates comprising 17 genera and six families growing with three plant host species...
February 10, 2017: New Phytologist
https://www.readbyqxmd.com/read/28183772/complete-genome-sequence-of-bradyrhizobium-japonicum-j5-isolated-from-a-soybean-nodule-in-hokkaido-japan
#18
Kazuma Kanehara, Kiwamu Minamisawa
Soybean bradyrhizobia form root nodules on soybean plants and symbiotically fix N2 Strain J5 is phylogenetically far from well-known representatives within the Bradyrhizobium japonicum linage. The complete genome showed the largest single chromosomal (10.1 Mb) and symbiosis island (998 kb) among complete genomes of soybean bradyrhizobia.
February 9, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28182540/symbiosis-based-alternative-learning-multi-swarm-particle-swarm-optimization
#19
Ben Niu, Huali Huang, Lijing Tan, Qiqi Duan
Inspired by the ideas from the mutual cooperation of symbiosis in natural ecosystem, this paper proposes a new variant of PSO, named Symbiosis-based Alternative Learning Multi-swarm Particle Swarm Optimization (SALMPSO). A learning probability to select one exemplar out of the center positions, the local best position, and the historical best position including the experience of internal and external multiple swarms, is used to keep the diversity of the population. Two different levels of social interaction within and between multiple swarms are proposed...
January 2017: IEEE/ACM Transactions on Computational Biology and Bioinformatics
https://www.readbyqxmd.com/read/28181581/transcriptome-profiling-of-galaxea-fascicularis-and-its-endosymbiont-symbiodinium-reveals-chronic-eutrophication-tolerance-pathways-and-metabolic-mutualism-between-partners
#20
Zhenyue Lin, Mingliang Chen, Xu Dong, Xinqing Zheng, Haining Huang, Xun Xu, Jianming Chen
In the South China Sea, coastal eutrophication in the Beibu Gulf has seriously threatened reef habitats by subjecting corals to chronic physiological stress. To determine how coral holobionts may tolerate such conditions, we examined the transcriptomes of healthy colonies of the galaxy coral Galaxea fascicularis and its endosymbiont Symbiodinium from two reef sites experiencing pristine or eutrophied nutrient regimes. We identified 236 and 205 genes that were differentially expressed in eutrophied hosts and symbionts, respectively...
February 9, 2017: Scientific Reports
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