keyword
MENU ▼
Read by QxMD icon Read
search

symbiosis

keyword
https://www.readbyqxmd.com/read/28548657/the-endobacterium-of-an-arbuscular-mycorrhizal-fungus-modulates-the-expression-of-its-toxin-antitoxin-systems-during-the-life-cycle-of-its-host
#1
Alessandra Salvioli di Fossalunga, Justine Lipuma, Francesco Venice, Laurence Dupont, Paola Bonfante
Arbuscular mycorrhizal fungi (AMF) are widespread root symbionts that perform important ecological services, such as improving plant nutrient and water acquisition. Some AMF from the Gigasporaceae family host a population of endobacteria, Candidatus Glomeribacter gigasporarum (Cagg). The analysis of the Cagg genome identified six putative toxin-antitoxin modules (TAs), consisting of pairs of stable toxins and unstable antitoxins that affect diverse physiological functions. Sequence analysis suggested that these TA modules were acquired by horizontal transfer...
May 26, 2017: ISME Journal
https://www.readbyqxmd.com/read/28546553/symbiont-community-stability-through-severe-coral-bleaching-in-a-thermally-extreme-lagoon
#2
E G Smith, G O Vaughan, R N Ketchum, D McParland, J A Burt
Coral reefs are threatened by climate change as coral-algal symbioses are currently living close to their upper thermal limits. The resilience of the algal partner plays a key role in determining the thermal tolerance of the coral holobiont and therefore, understanding the acclimatory limits of present day coral-algal symbioses is fundamental to forecasting corals' responses to climate change. This study characterised the symbiont community in a highly variable and thermally extreme (Max = 37.5 °C, Min = 16...
May 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28546156/ancestral-alliances-plant-mutualistic-symbioses-with-fungi-and-bacteria
#3
REVIEW
Francis M Martin, Stéphane Uroz, David G Barker
Within the plant microbiota, mutualistic fungal and bacterial symbionts are striking examples of microorganisms playing crucial roles in nutrient acquisition. They have coevolved with their hosts since initial plant adaptation to land. Despite the evolutionary distances that separate mycorrhizal and nitrogen-fixing symbioses, these associations share a number of highly conserved features, including specific plant symbiotic signaling pathways, root colonization strategies that circumvent plant immune responses, functional host-microbe interface formation, and the central role of phytohormones in symbiosis-associated root developmental pathways...
May 26, 2017: Science
https://www.readbyqxmd.com/read/28544363/expression-patterns-of-sterol-transporters-npc1-and-npc2-in-the-cnidarian-dinoflagellate-symbiosis
#4
Vincent Dani, Fabrice Priouzeau, Marjolijn Mertz, Magali Mondin, Sophie Pagnotta, Sandra Lacas-Gervais, Simon K Davy, Cécile Sabourault
The symbiotic interaction between cnidarians (e.g. corals and sea anemones) and photosynthetic dinoflagellates of the genus Symbiodinium is triggered by both host-symbiont recognition processes and metabolic exchange between the two partners. The molecular communication is crucial for homeostatic regulation of the symbiosis, both under normal conditions and during stresses that further lead to symbiosis collapse. It is therefore important to identify and fully characterize the key players of this intimate interaction at the symbiotic interface...
May 22, 2017: Cellular Microbiology
https://www.readbyqxmd.com/read/28542979/consequences-of-symbiont-co-infections-for-insect-host-phenotypes
#5
Ailsa H C McLean, Benjamin J Parker, Jan Hrček, James Kavanagh, Peter A D Wellham, H Charles J Godfray
1.Most animals host communities of symbiotic bacteria. In insects, these symbionts may have particularly intimate interactions with their hosts: many are intracellular and can play important roles in host ecology and evolution, including protection against natural enemies. 2.We investigated how interactions between different species or strains of endosymbiotic bacteria within an aphid host influence the outcome of symbiosis for both symbiont and host. 3.We first asked whether different combinations of facultative symbiont species or strains can exist in stable co-infections...
May 25, 2017: Journal of Animal Ecology
https://www.readbyqxmd.com/read/28535846/physical-contact-and-carbon-transfer-between-a-lichen-forming-trebouxia-alga-and-a-novel-alphaproteobacterium
#6
Mieko Kono, Hideyuki Tanabe, Yoshihito Ohmura, Yoko Satta, Yohey Terai
Recent progress in molecular techniques has begun to alter traditional recognition of lichens as symbiotic organisms comprised of a fungus and photosynthetic partners (green algae and/or cyanobacteria). Diverse organisms, especially various non-photosynthetic bacteria, are now indicated to be integral components of lichen symbiosis. Although lichen-associated bacteria are inferred to have functions that could support the symbiosis, little is known about their physical and nutritional interaction with fungi and algae...
May 23, 2017: Microbiology
https://www.readbyqxmd.com/read/28535447/application-of-a-life-cycle-assessment-to-compare-environmental-performance-in-coal-mine-tailings-management
#7
Joni Safaat Adiansyah, Nawshad Haque, Michele Rosano, Wahidul Biswas
This study compares coal mine tailings management strategies using life cycle assessment (LCA) and land-use area metrics methods. Hybrid methods (the Australian indicator set and the ReCiPe method) were used to assess the environmental impacts of tailings management strategies. Several strategies were considered: belt filter press (OPT 1), tailings paste (OPT 2), thickened tailings (OPT 3), and variations of OPT 1 using combinations of technology improvement and renewable energy sources (OPT 1A-D). Electrical energy was found to contribute more than 90% of the environmental impacts...
May 20, 2017: Journal of Environmental Management
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
#8
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/28533766/predicting-the-hma-lma-status-in-marine-sponges-by-machine-learning
#9
Lucas Moitinho-Silva, Georg Steinert, Shaun Nielsen, Cristiane C P Hardoim, Yu-Chen Wu, Grace P McCormack, Susanna López-Legentil, Roman Marchant, Nicole Webster, Torsten Thomas, Ute Hentschel
The dichotomy between high microbial abundance (HMA) and low microbial abundance (LMA) sponges has been observed in sponge-microbe symbiosis, although the extent of this pattern remains poorly unknown. We characterized the differences between the microbiomes of HMA (n = 19) and LMA (n = 17) sponges (575 specimens) present in the Sponge Microbiome Project. HMA sponges were associated with richer and more diverse microbiomes than LMA sponges, as indicated by the comparison of alpha diversity metrics. Microbial community structures differed between HMA and LMA sponges considering Operational Taxonomic Units (OTU) abundances and across microbial taxonomic levels, from phylum to species...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28530168/microbe-profile-akkermansia-muciniphila-a-conserved-intestinal-symbiont-that-acts-as-the-gatekeeper-of-our-mucosa
#10
Willem M de Vos
Akkermansia muciniphila is an abundant inhabitant of the intestinal tract of humans and many other animals. It is the sole intestinal representative of the verrucomicrobia in human stools and depleted in adults suffering from obesity, diabetes and several other diseases. A. muciniphila degrades intestinal mucin into mainly propionic and acetic acid, and lives in symbiosis with its host, marked by signalling to immune and metabolic pathways, priming trophic chains and likely providing competitive exclusion at the host-microbe interface...
May 22, 2017: Microbiology
https://www.readbyqxmd.com/read/28528390/colonization-by-nitrogen-fixing-frankia-bacteria-causes-short-term-increases-in-herbivore-susceptibility-in-red-alder-alnus-rubra-seedlings
#11
Daniel J Ballhorn, Jacob D Elias, M A Balkan, Rachel F Fordyce, Peter G Kennedy
Carbon allocation demands from root-nodulating nitrogen-fixing bacteria (NFB) can modulate the host plant's chemical phenotype, with strong bottom-up effects on herbivores. In contrast to well-studied rhizobia, the effects of other important NFB on plant chemistry and herbivory are much less understood. Here, combining field surveys in the Oregon Coast Range, USA with laboratory experiments, we analyzed how N2-fixing Frankia bacteria influenced plant growth, chemistry, and herbivory on Alnus rubra (red alder) seedlings...
May 20, 2017: Oecologia
https://www.readbyqxmd.com/read/28521336/chemical-ecology-of-antibiotic-production-by-actinomycetes
#12
Anne van der Meij, Sarah F Worsley, Matthew I Hutchings, Gilles P van Wezel
Actinomycetes are a diverse family of filamentous bacteria that produce a plethora of natural products relevant for agriculture, biotechnology and medicine, including the majority of the antibiotics we use in the clinic. Rather than as free-living bacteria, many actinomycetes have evolved to live in symbiosis with among others plants, fungi, insects and sponges. As a common theme, these organisms profit from the natural products and enzymes produced by the actinomycetes, for example, for protection against pathogenic microbes, for growth promotion or for the degradation of complex natural polymers such as lignocellulose...
May 1, 2017: FEMS Microbiology Reviews
https://www.readbyqxmd.com/read/28517039/genetics-of-mycorrhizal-symbiosis-in-winter-wheat-triticum-aestivum
#13
Heike Lehnert, Albrecht Serfling, Matthias Enders, Wolfgang Friedt, Frank Ordon
Bread wheat (Triticum aestivum) is a major staple food and therefore of prime importance for feeding the Earth's growing population. Mycorrhiza is known to improve plant growth, but although extensive knowledge concerning the interaction between mycorrhizal fungi and plants is available, genotypic differences concerning the ability of wheat to form mycorrhizal symbiosis and quantitative trait loci (QTLs) involved in mycorrhization are largely unknown. Therefore, a diverse set of 94 bread wheat genotypes was evaluated with regard to root colonization by arbuscular mycorrhizal fungi...
May 18, 2017: New Phytologist
https://www.readbyqxmd.com/read/28515076/vertically-transmitted-symbionts-as-mechanisms-of-transgenerational-effects
#14
Pedro E Gundel, Jennifer A Rudgers, Kenneth D Whitney
PREMISE OF THE STUDY: A transgenerational effect occurs when a biotic or abiotic environmental factor acts on a parental individual and thereby affects the phenotype of progeny. Due to the importance of transgenerational effects for understanding plant ecology and evolution, their underlying mechanisms are of general interest. Here, we introduce the concept that inherited symbiotic microorganisms could act as mechanisms of transgenerational effects in plants. METHODS: We define the criteria required to demonstrate that transgenerational effects are microbially mediated and review evidence from the well-studied, vertically transmitted plant-fungal symbiosis (grass-Epichloë spp...
May 17, 2017: American Journal of Botany
https://www.readbyqxmd.com/read/28512450/host-plant-compatibility-shapes-the-proteogenome-of-frankia-coriariae
#15
Amir Ktari, Abdellatif Gueddou, Imen Nouioui, Guylaine Miotello, Indrani Sarkar, Faten Ghodhbane-Gtari, Arnab Sen, Jean Armengaud, Maher Gtari
Molecular signaling networks in the actinorhizal rhizosphere select host-compatible Frankia strains, trigger the infection process and eventually the genesis of nitrogen-fixing nodules. The molecular triggers involved remain difficult to ascertain. Root exudates (RE) are highly dynamic substrates that play key roles in establishing the rhizosphere microbiome. RE are known to induce the secretion by rhizobia of Nod factors, polysaccharides, and other proteins in the case of legume symbiosis. Next-generation proteomic approach was here used to decipher the key bacterial signals matching the first-step recognition of host plant stimuli upon treatment of Frankia coriariae strain BMG5...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28510705/crystal-structure-of-octocoral-lectin-sll-2-complexed-with-forssman-antigen-tetrasaccharide
#16
Akiko Kita, Mitsuru Jimbo, Ryuichi Sakai, Yukio Morimoto, Ryota Takeuchi, Hiroshi Tanaka, Takashi Takahashi, Kunio Miki
A symbiosis-related lectin, SLL-2, from the octocoral Sinularia lochmodes, distributes densely on the cell surface of microalgae, Symbiodinium sp., an endosymbiotic dinoflagellate of the coral, and is also shown to be a chemical cue that transforms dinoflagellates into a non-motile (coccoid) symbiotic state. SLL-2 binds to the sugar chain of the molecule similar to Forssman antigen pentasaccharide (GalNAcα1-3GalNAcβ1-3 Galα1-4 Galβ1-4Glc) on the surface of microalgae with high affinity. Here we report the crystal structure of the complex between SLL-2 and Forssman antigen tetrasaccharide (GalNAcα1-3GalNAcβ1-3 Galα1-4 Galβ) at 3...
May 16, 2017: Glycobiology
https://www.readbyqxmd.com/read/28503742/the-ern1-transcription-factor-gene-is-a-target-of-the-ccamk-cyclops-complex-and-controls-rhizobial-infection-in%C3%A2-lotus-japonicus
#17
Marion R Cerri, Quanhui Wang, Paul Stolz, Jessica Folgmann, Lisa Frances, Katja Katzer, Xiaolin Li, Anne B Heckmann, Trevor L Wang, J Allan Downie, Andreas Klingl, Fernanda de Carvalho-Niebel, Fang Xie, Martin Parniske
Bacterial accommodation inside living plant cells is restricted to the nitrogen-fixing root nodule symbiosis. In many legumes, bacterial uptake is mediated via tubular structures called infection threads (ITs). To identify plant genes required for successful symbiotic infection, we screened an ethyl methanesulfonate mutagenized population of Lotus japonicus for mutants defective in IT formation and cloned the responsible gene, ERN1, encoding an AP2/ERF transcription factor. We performed phenotypic analysis of two independent L...
May 15, 2017: New Phytologist
https://www.readbyqxmd.com/read/28503376/toward-a-better-understanding-of-the-mechanisms-of-symbiosis-a-comprehensive-proteome-map-of-a-nascent-insect-symbiont
#18
François Renoz, Antoine Champagne, Hervé Degand, Anne-Marie Faber, Pierre Morsomme, Vincent Foray, Thierry Hance
Symbiotic bacteria are common in insects and can affect various aspects of their hosts' biology. Although the effects of insect symbionts have been clarified for various insect symbiosis models, due to the difficulty of cultivating them in vitro, there is still limited knowledge available on the molecular features that drive symbiosis. Serratia symbiotica is one of the most common symbionts found in aphids. The recent findings of free-living strains that are considered as nascent partners of aphids provide the opportunity to examine the molecular mechanisms that a symbiont can deploy at the early stages of the symbiosis (i...
2017: PeerJ
https://www.readbyqxmd.com/read/28501637/serial-endosymbiosis-or-singular-event-at-the-origin-of-eukaryotes
#19
Nick Lane
'On the Origin of Mitosing Cells' heralded a new way of seeing cellular evolution, with symbiosis at its heart. Lynn Margulis (then Sagan) marshalled an impressive array of evidence for endosymbiosis, from cell biology to atmospheric chemistry and Earth history. Despite her emphasis on symbiosis, she saw plenty of evidence for gradualism in eukaryotic evolution, with multiple origins of mitosis and sex, repeated acquisitions of plastids, and putative evolutionary intermediates throughout the microbial world...
May 10, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/28499469/phylogenetically-diverse-groups-of-bradyrhizobium-isolated-from-nodules-of-tree-and-annual-legume-species-growing-in-ethiopia
#20
Tulu Degefu, Endalkachew Wolde-Meskel, Kedir Woliy, Åsa Frostegård
Bacteria belonging to the genus Bradyrhizobium nodulate various leguminous woody plants and herbs, including economically important crops such as soybean, peanut and cowpea. Here we analysed 39 Bradyrhizobium strains originating from root nodules of the leguminous trees and crops Acacia saligna, Faidherbia albida, Erythrina brucei, Albizia gummifera, Millettia ferruginea, Cajanus cajan, Vigna unguiculata and Phaseolus vulgaris, growing in southern Ethiopia. Multilocus sequence analyses (MLSA) of the 16S rRNA, glnII, recA, gyrB and dnaK genes and the ITS region grouped the test strains into seven well-supported genospecies (I-VII), six of which occupied distinct positions excluding all hitherto defined Bradyrhizobium species...
April 26, 2017: Systematic and Applied Microbiology
keyword
keyword
46254
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"