Search results for "Cinara"

showing 4 items of 4 documents

Metabolic complementation in bacterial communities: Necessary conditions and optimality

2016

Bacterial communities may display metabolic complementation, in which different members of the association partially contribute to the same biosynthetic pathway. In this way, the end product of the pathway is synthesized by the community as a whole. However, the emergence and the benefits of such complementation are poorly understood. Herein, we present a simple model to analyze the metabolic interactions among bacteria, including the host in the case of endosymbiotic bacteria. The model considers two cell populations, with both cell types encoding for the same linear biosynthetic pathway. We have found that, for metabolic complementation to emerge as an optimal strategy, both product inhib…

0301 basic medicineMicrobiology (medical)Cell typeSystems biology030106 microbiologyCelllcsh:QR1-502Computational biologyBiologyMicrobiologylcsh:Microbiology03 medical and health sciencesMetabolic complementationmetabolic modelingHypothesis and TheoryBotanymedicineCinara cedricross-feedingEndosymbiotic bacteriaHost (biology)biology.organism_classificationkinetic modelingComplementation030104 developmental biologymedicine.anatomical_structureProduct inhibitionendosymbiotic bacteriaMetabolic ModellingoptimizationBacteria
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Reinventing the Wheel and Making It Round Again: Evolutionary Convergence in Buchnera-Serratia Symbiotic Consortia between the Distantly Related Lach…

2016

International audience; Virtually all aphids (Aphididae) harbor Buchnera aphidicola as an obligate endosymbiont to compensate nutritional deficiencies arising from their phloem diet. Many species within the Lachninae subfamily seem to be consistently associated also with Serratia symbiotica We have previously shown that both Cinara (Cinara) cedri and Cinara (Cupressobium) tujafilina (Lachninae: Eulachnini tribe) have indeed established co-obligate associations with both Buchnera and S. symbiotica However, while Buchnera genomes of both Cinara species are similar, genome degradation differs greatly between the two S. symbiotica strains. To gain insight into the essentiality and degree of int…

0301 basic medicineSerratiaLachninaeBiodiversité et EcologieGenomeaphid endosymbiontBiodiversity and EcologyEvolution Molecular03 medical and health sciencesBuchneraPhylogeneticsRNA Ribosomal 16SBotanyGeneticsAnimalsSymbiosisPhylogenyEcology Evolution Behavior and SystematicsBuchnera aphidicola;Lachninae;Serratia symbiotica;aphid endosymbiont;co-obligate;symbiont settlementGeneticssymbiont settlementAphidbiologyObligategénomefood and beveragesbuchnera aphidicolaAphididaeSequence Analysis DNASerratia symbioticabiochemical phenomena metabolism and nutritionbiology.organism_classificationbactérie endosymbiotiqueTuberolachnus salignussymbiont030104 developmental biologypuceronAphidsCinaraévolution génomique[SDE.BE]Environmental Sciences/Biodiversity and EcologyBuchneraco-obligateGenome BacterialResearch Article
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Seasonal Changes in the Endosymbiotic Consortia of Aphids from the Genus <i>Cinara</i>

2016

Buchnera aphidicola is the primary endosymbiont of aphids with which it maintains an obligate mutualistic symbiotic relationship. Insects also maintain facultative symbiotic relationships with secondary symbionts, and Serratia symbiotica is the most common in aphids. The presence of both symbionts in aphids of the subfamily Lachninae has been widely studied by our group. We examined two closely related aphids, Cinara tujafilina and C. cedri in the present study. Even though both B. aphidicola strains have similar genome sizes and gene contents, the genomes of the two S. symbiotica strains were markedly different. The SCc strain has the smallest genome known for this species, while SCt posse…

0301 basic medicineeducation.field_of_studyFacultativebiologyObligatePopulationfood and beveragesSoil ScienceZoologyPlant ScienceGeneral Medicinebiochemical phenomena metabolism and nutritionbiology.organism_classificationSerratiaAcyrthosiphon pisum03 medical and health sciences030104 developmental biologySymbiosisBotanyCinaraeducationBuchneraEcology Evolution Behavior and SystematicsMicrobes and Environments
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Coexistence of Wolbachia with Buchnera aphidicola and a Secondary Symbiont in the Aphid Cinara cedri

2004

ABSTRACT Intracellular symbiosis is very common in the insect world. For the aphid Cinara cedri , we have identified by electron microscopy three symbiotic bacteria that can be characterized by their different sizes, morphologies, and electrodensities. PCR amplification and sequencing of the 16S ribosomal DNA (rDNA) genes showed that, in addition to harboring Buchnera aphidicola , the primary endosymbiont of aphids, C. cedri harbors a secondary symbiont (S symbiont) that was previously found to be associated with aphids (PASS, or R type) and an α-proteobacterium that belongs to the Wolbachia genus. Using in situ hybridization with specific bacterial probes designed for symbiont 16S rDNA seq…

Genetics and Molecular BiologyBacterial genome sizeBiologyDNA RibosomalPolymerase Chain ReactionMicrobiologyBuchneraRNA Ribosomal 16SBotanyAnimalsSymbiosisMolecular BiologyRibosomal DNAPhylogenyGeneticsAphidBacteriocytefungifood and beveragesbiochemical phenomena metabolism and nutritionbiology.organism_classificationMicroscopy ElectronAphidsCinarabacteriaWolbachiaBuchneraWolbachiaSymbiotic bacteriaJournal of Bacteriology
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