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Plant microbial interaction

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https://www.readbyqxmd.com/read/28538678/effects-of-commercial-apple-varieties-on-human-gut-microbiota-composition-and-metabolic-output-using-an-in-vitro-colonic-model
#1
Athanasios Koutsos, Maria Lima, Lorenza Conterno, Mattia Gasperotti, Martina Bianchi, Francesca Fava, Urska Vrhovsek, Julie A Lovegrove, Kieran M Tuohy
Apples are a rich source of polyphenols and fiber. A major proportion of apple polyphenols escape absorption in the small intestine and together with non-digestible polysaccharides reach the colon, where they can serve as substrates for bacterial fermentation. Animal studies suggest a synergistic interaction between apple polyphenols and the soluble fiber pectin; however, the effects of whole apples on human gut microbiota are less extensively studied. Three commercial apple varieties-Renetta Canada, Golden Delicious and Pink Lady-were digested and fermented in vitro using a batch culture colonic model (pH 5...
May 24, 2017: Nutrients
https://www.readbyqxmd.com/read/28535261/recruitment-of-a-lineage-specific-virulence-regulatory-pathway-promotes-intracellular-infection-by-a-plant-pathogen-experimentally-evolved-into-a-legume-symbiont
#2
Delphine Capela, Marta Marchetti, Camille Clérissi, Anthony Perrier, Dorian Guetta, Carine Gris, Marc Valls, Alain Jauneau, Stéphane Cruveiller, Eduardo P C Rocha, Catherine Masson-Boivin
Ecological transitions between different lifestyles, such as pathogenicity, mutualism and saprophytism, have been very frequent in the course of microbial evolution, and often driven by horizontal gene transfer. Yet, how genomes achieve the ecological transition initiated by the transfer of complex biological traits remains poorly known. Here we used experimental evolution, genomics, transcriptomics and high-resolution phenotyping to analyze the evolution of the plant pathogen Ralstonia solanacearum into legume symbionts, following the transfer of a natural plasmid encoding the essential mutualistic genes...
May 23, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28515886/aquatic-microfauna-alter-larval-food-resources-and-affect-development-and-biomass-of-west-nile-and-saint-louis-encephalitis-vector-culex-nigripalpus-diptera-culicidae
#3
Dagne Duguma, Michael G Kaufman, Arthur B Simas Domingos
Ciliate protists and rotifers are ubiquitous in aquatic habitats and can comprise a significant portion of the microbial food resources available to larval mosquitoes, often showing substantial declines in abundance in the presence of mosquito larvae. This top-down regulation of protists is reported to be strong for mosquitoes inhabiting small aquatic containers such as pitcher plants or tree holes, but the nature of these interactions with larval mosquitoes developing in other aquatic habitats is poorly understood...
May 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28512464/insights-into-the-mechanism-of-proliferation-on-the-special-microbes-mediated-by-phenolic-acids-in-the-radix-pseudostellariae-rhizosphere-under-continuous-monoculture-regimes
#4
Hongmiao Wu, Junjian Xu, Juanying Wang, Xianjin Qin, Linkun Wu, Zhicheng Li, Sheng Lin, Weiwei Lin, Quan Zhu, Muhammad U Khan, Wenxiong Lin
As potent allelochemicals, phenolic acids are believed to be associated with replanting disease and cause microflora shift and structural disorder in the rhizosphere soil of continuously monocultured Radix pseudostellariae. The transcriptome sequencing was used to reveal the mechanisms underlying the differential response of pathogenic bacterium Kosakonia sacchari and beneficial bacterium Bacillus pumilus on their interactions with phenolic acids, the main allelochemicals in root exudates of R. pseudostellariae in the monoculture system...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28511691/tomato-root-microbiota-and-phytophthora-parasitica-associated-disease
#5
Marie Larousse, Corinne Rancurel, Camille Syska, Ferran Palero, Catherine Etienne, Benoît Industri, Xavier Nesme, Marc Bardin, Eric Galiana
BACKGROUND: Interactions between pathogenic oomycetes and microbiota residing on the surface of the host plant root are unknown, despite being critical to inoculum constitution. The nature of these interactions was explored for the polyphagous and telluric species Phytophthora parasitica. RESULTS: Composition of the rhizospheric microbiota of Solanum lycopersicum was characterized using deep re-sequencing of 16S rRNA gene to analyze tomato roots either free of or partly covered with P...
May 16, 2017: Microbiome
https://www.readbyqxmd.com/read/28508261/functional-roles-of-the-pepper-leucine-rich-repeat-protein-and-its-interactions-with-pathogenesis-related-and-hypersensitive-induced-proteins-in-plant-cell-death-and-immunity
#6
REVIEW
Jeum Kyu Hong, In Sun Hwang, Byung Kook Hwang
Pepper leucine-rich repeat protein (CaLRR1) interacts with defense response proteins to regulate plant cell death and immunity. This review highlights the current understanding of the molecular functions of CaLRR1 and its interactor proteins. Plant cell death and immune responses to microbial pathogens are controlled by complex and tightly regulated molecular signaling networks. Xanthomonas campestris pv. vesicatoria (Xcv)-inducible pepper (Capsicum annuum) leucine-rich repeat protein 1 (CaLRR1) serves as a molecular marker for plant cell death and immunity signaling...
May 15, 2017: Planta
https://www.readbyqxmd.com/read/28508070/decoupling-of-microbial-carbon-nitrogen-and-phosphorus-cycling-in-response-to-extreme-temperature-events
#7
Maria Mooshammer, Florian Hofhansl, Alexander H Frank, Wolfgang Wanek, Ieda Hämmerle, Sonja Leitner, Jörg Schnecker, Birgit Wild, Margarete Watzka, Katharina M Keiblinger, Sophie Zechmeister-Boltenstern, Andreas Richter
Predicted changes in the intensity and frequency of climate extremes urge a better mechanistic understanding of the stress response of microbially mediated carbon (C) and nutrient cycling processes. We analyzed the resistance and resilience of microbial C, nitrogen (N), and phosphorus (P) cycling processes and microbial community composition in decomposing plant litter to transient, but severe, temperature disturbances, namely, freeze-thaw and heat. Disturbances led temporarily to a more rapid cycling of C and N but caused a down-regulation of P cycling...
May 2017: Science Advances
https://www.readbyqxmd.com/read/28505582/plastic-potential-how-the-phenotypes-and-adaptations-of-pathogens-are-influenced-by-microbial-interactions-within-plants
#8
REVIEW
Kayleigh R O'Keeffe, Ignazio Carbone, Corbin D Jones, Charles E Mitchell
Predicting the effects of plant-associated microbes on emergence, spread, and evolution of plant pathogens demands an understanding of how pathogens respond to these microbes at two levels of biological organization: that of an individual pathogen and that of a pathogen population across multiple individual plants. We first examine the plastic responses of individual plant pathogens to microbes within a shared host, as seen through changes in pathogen growth and multiplication. We then explore the limited understanding of how within-plant microbial interactions affect pathogen populations and discuss the need to incorporate population-level observations with population genomic techniques...
May 12, 2017: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/28505068/a-new-method-for-the-fast-analysis-of-trihalomethanes-in-tap-and-recycled-waters-using-headspace-gas-chromatography-with-micro-electron-capture-detection
#9
Lydon D Alexandrou, Barry J Meehan, Paul D Morrison, Oliver A H Jones
Chemical disinfection of water supplies brings significant public health benefits by reducing microbial contamination. The process can however, result in the formation of toxic compounds through interactions between disinfectants and organic material in the source water. These new compounds are termed disinfection by-products (DBPs). The most common are the trihalomethanes (THMs) such as trichloromethane (chloroform), dichlorobromomethane, chlorodibromomethane and tribromomethane (bromoform); these are commonly reported as a single value for total trihalomethanes (TTHMs)...
May 15, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28498521/does-drought-stress-modify-the-effects-of-plant-growth-promoting-rhizobacteria-on-an-aboveground-chewing-herbivore
#10
Maite Fernández de Bobadilla, Julia Friman, Nurmi Pangesti, Marcel Dicke, Joop J A van Loon, Ana Pineda
Soil microbes have important effects on the interactions of plants with their environment, by promoting plant growth, inducing resistance to pests or by conferring tolerance to abiotic stress. However, their effects are variable and the factors responsible for this variation are mainly unknown. Our aim was to assess how drought stress modifies the effect of the non-pathogenic rhizobacterium Pseudomonas simiae WCS417r on plant growth and resistance against the generalist leaf-chewing caterpillar Mamestra brassicae...
May 12, 2017: Insect Science
https://www.readbyqxmd.com/read/28494759/time-resolved-dual-transcriptomics-reveal-early-induced-nicotiana-benthamiana-root-genes-and-conserved-infection-promoting-phytophthora-palmivora-effectors
#11
Edouard Evangelisti, Anna Gogleva, Thomas Hainaux, Mehdi Doumane, Frej Tulin, Clément Quan, Temur Yunusov, Kévin Floch, Sebastian Schornack
BACKGROUND: Plant-pathogenic oomycetes are responsible for economically important losses in crops worldwide. Phytophthora palmivora, a tropical relative of the potato late blight pathogen, causes rotting diseases in many tropical crops including papaya, cocoa, oil palm, black pepper, rubber, coconut, durian, mango, cassava and citrus. Transcriptomics have helped to identify repertoires of host-translocated microbial effector proteins which counteract defenses and reprogram the host in support of infection...
May 11, 2017: BMC Biology
https://www.readbyqxmd.com/read/28494084/the-use-of-high-throughput-dna-sequence-analysis-to-assess-the-endophytic-microbiome-of-date-palm-roots-grown-under-different-levels-of-salt-stress
#12
Mahmoud W Yaish, Ibtisam Al-Harrasi, Aliya S Alansari, Rashid Al-Yahyai, Bernard R Glick
Date palms are able to grow under diverse abiotic stress conditions including in saline soils, where microbial communities may be help in the plant's salinity tolerance. These communities able to produce specific growth promoting substances can enhance date palm growth in a saline environment. However, these communities are poorly defined. In the work reported here, the date palm endophytic bacterial and fungal communities were identified using the pyrosequencing method, and the microbial differential abundance in the root upon exposure to salinity stress was estimated...
September 2016: International Microbiology: the Official Journal of the Spanish Society for Microbiology
https://www.readbyqxmd.com/read/28491055/metagenomic-sequencing-of-diamondback-moth-gut-microbiome-unveils-key-holobiont-adaptations-for-herbivory
#13
Xiaofeng Xia, Geoff M Gurr, Liette Vasseur, Dandan Zheng, Huanzi Zhong, Bingcai Qin, Junhan Lin, Yue Wang, FengQin Song, Yong Li, Hailan Lin, Minsheng You
Herbivore specialists adapt to feed on a specific group of host plants by evolving various mechanisms to respond to plant defenses. Insects also possess complex gut microbiotas but their potential role in adaptation is poorly understood. Our previous study of the genome of diamondback moth, Plutella xylostella, revealed an intrinsic capacity to detoxify plant defense compounds, which is an important factor in its success as a pest. Here we expand on that work with a complete taxonomic and functional profile of the P...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28482226/microbially-and-phytofabricated-agnps-with-different-mode-of-bactericidal-action-were-identified-to-have-comparable-potential-for-surface-fabrication-of-central-venous-catheters-to-combat-staphylococcus-aureus-biofilm
#14
Roshmi Thomas, Shiji Mathew, A R Nayana, Jyothis Mathews, E K Radhakrishnan
In spite of newer innovations and process improvements, catheter related infections still pose serious threat to hospitalized patients. Silver nanoparticles (AgNPs) are well demonstrated to have antibacterial properties and also have been implemented for surface fabrication of many indwelling medical devices. So, herein we sought to compare the performance of AgNPs generated through biogenic routes using bacteria and plant extract for their antibacterial and antibiofilm potential against biofilm forming Staphylococcus aureus...
April 28, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28480539/plant-litter-chemistry-alters-the-content-and-composition-of-organic-carbon-associated-with-soil-mineral-and-aggregate-fractions-in-invaded-ecosystems
#15
Mioko Tamura, Vidya Suseela, Myrna Simpson, Brian Powell, Nishanth Tharayil
Through the input of disproportionate quantities of chemically distinct litter, invasive plants may potentially influence the fate of organic matter associated with soil mineral and aggregate fractions in some of the ecosystems they invade. Though context dependent, these native ecosystems subjected to prolonged invasion by exotic plants may be instrumental in distinguishing the role of plant-microbe-mineral interactions from the broader edaphic and climatic influences on the formation of soil organic matter (SOM)...
May 8, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28476862/the-natural-biotic-environment-of-caenorhabditis-elegans
#16
Hinrich Schulenburg, Marie-Anne Félix
Organisms evolve in response to their natural environment. Consideration of natural ecological parameters are thus of key importance for our understanding of an organism's biology. Curiously, the natural ecology of the model species Caenorhabditis elegans has long been neglected, even though this nematode has become one of the most intensively studied models in biological research. This lack of interest changed ∼10 yr ago. Since then, an increasing number of studies have focused on the nematode's natural ecology...
May 2017: Genetics
https://www.readbyqxmd.com/read/28470183/nodule-cysteine-rich-peptides-maintain-a-working-balance-during-nitrogen-fixing-symbiosis
#17
REVIEW
Huairong Pan, Dong Wang
The nitrogen-fixing symbiosis between legumes and rhizobia is highly relevant to human society and global ecology. One recent breakthrough in understanding the molecular interplay between the plant and the prokaryotic partner is that, at least in certain legumes, the host deploys a number of antimicrobial peptides, called nodule cysteine-rich (NCR) peptides, to control the outcome of this symbiosis. Under this plant dominance, the bacteria are subject to the sub-lethal toxicity of these antimicrobial peptides, resulting in limited reproductive potential...
May 4, 2017: Nature Plants
https://www.readbyqxmd.com/read/28470167/nodule-cysteine-rich-peptides-maintain-a-working-balance-during-nitrogen-fixing-symbiosis
#18
REVIEW
Huairong Pan, Dong Wang
The nitrogen-fixing symbiosis between legumes and rhizobia is highly relevant to human society and global ecology. One recent breakthrough in understanding the molecular interplay between the plant and the prokaryotic partner is that, at least in certain legumes, the host deploys a number of antimicrobial peptides, called nodule cysteine-rich (NCR) peptides, to control the outcome of this symbiosis. Under this plant dominance, the bacteria are subject to the sub-lethal toxicity of these antimicrobial peptides, resulting in limited reproductive potential...
May 4, 2017: Nature Plants
https://www.readbyqxmd.com/read/28469608/genome-centric-analysis-of-a-thermophilic-and-cellulolytic-bacterial-consortium-derived-from-composting
#19
Leandro N Lemos, Roberta V Pereira, Ronaldo B Quaggio, Layla F Martins, Livia M S Moura, Amanda R da Silva, Luciana P Antunes, Aline M da Silva, João C Setubal
Microbial consortia selected from complex lignocellulolytic microbial communities are promising alternatives to deconstruct plant waste, since synergistic action of different enzymes is required for full degradation of plant biomass in biorefining applications. Culture enrichment also facilitates the study of interactions among consortium members, and can be a good source of novel microbial species. Here, we used a sample from a plant waste composting operation in the São Paulo Zoo (Brazil) as inoculum to obtain a thermophilic aerobic consortium enriched through multiple passages at 60°C in carboxymethylcellulose as sole carbon source...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28464335/the-interacting-roles-of-climate-soils-and-plant-production-on-soil-microbial-communities-at-a-continental-scale
#20
M P Waldrop, M J Holloway, D B Smith, M B Goldhaber, R E Drenovsky, K M Scow, R Dick, D Howard, B Wylie, J B Grace
Soil microbial communities control critical ecosystem processes such as decomposition, nutrient cycling, and soil organic matter formation. Continental scale patterns in the composition and functioning of microbial communities are related to climatic, biotic, and edaphic factors such as temperature and precipitation, plant community composition, and soil carbon, nitrogen, and pH. Although these relationships have been well explored individually, the examination of the factors that may act directly on microbial communities versus those that may act indirectly through other ecosystem properties has not been well developed...
May 2, 2017: Ecology
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