Relevant bibliographies by topics / Symbiotic relation

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Symbiotic relation'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "Symbiotic relation"

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Li, Liang Xian. "The Motivation of Minor Enterprises Competition, Cooperation and Symbiosis." Advanced Materials Research 268-270 (July 2011): 732–36. http://dx.doi.org/10.4028/www.scientific.net/amr.268-270.732.

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The competition and symbiosis relation of minor enterprises results from their active participation and other factors. The main motivations of their symbiotic development are to integrate different resources of relavant enterprises, share benefits and risks, promote continuely rapid development. In network economy era, cooperative symbiosis is playing an important parts in enterprise strategic management and innovation.
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Stone, Dianna L., Julio C. Canedo, and Shay Tzafrir. "The symbiotic relation between organizations and society." Journal of Managerial Psychology 28, no. 5 (June 28, 2013): 432–51. http://dx.doi.org/10.1108/jmp-12-2012-0396.

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Lozano, Luis, Ismael Hernández-González, Patricia Bustos, Rosa I. Santamaría, Valeria Souza, J. Peter W. Young, Guillermo Dávila, and Víctor González. "Evolutionary Dynamics of Insertion Sequences in Relation to the Evolutionary Histories of the Chromosome and Symbiotic Plasmid Genes of Rhizobium etli Populations." Applied and Environmental Microbiology 76, no. 19 (July 30, 2010): 6504–13. http://dx.doi.org/10.1128/aem.01001-10.

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ABSTRACT Insertion sequences (IS) are mobile genetic elements that are distributed in many prokaryotes. In particular, in the genomes of the symbiotic nitrogen-fixing bacteria collectively known as rhizobia, IS are fairly abundant in plasmids or chromosomal islands that carry the genes needed for symbiosis. Here, we report an analysis of the distribution and genetic conservation of the IS found in the genome of Rhizobium etli CFN42 in a collection of 87 Rhizobium strains belonging to populations with different geographical origins. We used PCR to generate presence/absence profiles of the 39 IS found in R. etli CFN42 and evaluated whether the IS were located in consistent genomic contexts. We found that the IS from the symbiotic plasmid were frequently present in the analyzed strains, whereas the chromosomal IS were observed less frequently. We then examined the evolutionary dynamics of these strains based on a population genetic analysis of two chromosomal housekeeping genes (glyA and dnaB) and three symbiotic sequences (nodC and the two IS elements). Our results indicate that the IS contained within the symbiotic plasmid have a higher degree of genomic context conservation, lower nucleotide diversity and genetic differentiation, and fewer recombination events than the chromosomal housekeeping genes. These results suggest that the R. etli populations diverged recently in Mexico, that the symbiotic plasmid also had a recent origin, and that the IS elements have undergone a process of cyclic infection and expansion.
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Leonidas, Carolina, and Manoel Antônio dos Santos. "SYMBIOTIC ILLUSION AND FEMALE IDENTITY CONSTRUCTION IN EATING DISORDERS: A PSYCHOANALYTICAL PSYCHOSOMATICS’ PERSPECTIVE." Ágora: Estudos em Teoria Psicanalítica 23, no. 1 (April 2020): 84–93. http://dx.doi.org/10.1590/1809-44142020001010.

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Abstract: This study aims primarily to reflect on the role of symbiotic illusion in the construction of female identity in women with eating disorders (ED), using premises from psychoanalytic psychosomatics. Considering ED as psychopathologies related to the affective economy, Oedipal relations play crucial role in the process of identity constitution. Mother-daughter relationships in ED are shaped in the molds of symbiotic illusion, with weak father figures. We presented a case study to briefly illustrate the theoretical framework. The omissive posture of a father to interdict the symbiotic relation leads daughters to find themselves unable to libidinally invest in other objects.
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Cai, Ming, and Mankin Mak. "Symbiotic Relation between Planetary and Synoptic-Scale Waves." Journal of the Atmospheric Sciences 47, no. 24 (December 1990): 2953–68. http://dx.doi.org/10.1175/1520-0469(1990)047<2953:srbpas>2.0.co;2.

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Riquelme, Alejandro, and Patricio Hinrichsen. "Non-symbiotic hemoglobin and its relation with hypoxic stress." Chilean journal of agricultural research 75 (August 2015): 80–89. http://dx.doi.org/10.4067/s0718-58392015000300009.

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van Rossum, Diman, Arthur Muyotcha, Bram M. de Hoop, Henk W. van Verseveld, Adriaan H. Stouthamer, and Fred C. Boogerd. "Soil acidity in relation to groundnut-Bradyrhizobium symbiotic performance." Plant and Soil 163, no. 2 (June 1994): 165–75. http://dx.doi.org/10.1007/bf00007965.

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Canizales-Flores, H. M., A. P. Rodríguez-Troncoso, F. A. Rodríguez-Zaragoza, and A. L. Cupul-Magaña. "A Long-Term Symbiotic Relationship: Recruitment and Fidelity of the Crab Trapezia on Its Coral Host Pocillopora." Diversity 13, no. 9 (September 19, 2021): 450. http://dx.doi.org/10.3390/d13090450.

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The symbiotic relationship between the crab Trapezia spp. and pocilloporid corals has been characterized as obligate. Although this relationship is considered common and has been widely registered within the distribution areas of these corals, the initiation of this symbiotic relation and its potential persistence throughout the life cycle of the crustacean is still poorly described. To understand the Trapezia–Pocillopora symbiosis, determining the time and conditions when Trapezia recruits a coral colony and the factors influencing this process are key. Thus, in the present study, healthy, small and unrecruited coral fragments were attached to the substrates (using cable ties) of nearby adult Pocillopora colonies. All fragments were monitored for two years to measure their growth and size at the first evidence of Trapezia crab recruitment, as well as the abundance and permanence of the crabs on the coral fragments. Results showed a relation between the space available (coral volume) and crab recruitment as an increase in substrate complexity is required to provide protection for the crabs and hence maintain the symbiosis, while abiotic conditions such as sea temperature and the distance of the fragments from the adult coral colonies seemingly did not affect the recruitment process. In addition, crabs are able to move between colonies, thus discarding the theory that once recruited, crabs are obligate residents on this specific colony.
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Oliveira, Wladecir Salles de, Patrícia Perondi Anchão Oliveira, Moacyr Corsi, Fábio Rodrigo Sanches Duarte, and Siu Mui Tsai. "Alfalfa yield and quality as function of nitrogen fertilization and symbiosis with Sinorhizobium meliloti." Scientia Agricola 61, no. 4 (2004): 433–38. http://dx.doi.org/10.1590/s0103-90162004000400013.

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The efficiency of the symbiotic process between alfalfa (Medicago sativa L.) and Sinorhizobium meliloti can be drastically affected by soil nitrogen. This research evaluates how mineral fertilization affects the contribution of symbiosis to the yield and quality of alfalfa in two experiments under controlled conditions, and a third one in the field. Under controlled conditions, positive effect of nitrogen fertilizer was observed, whereas, in the field, negative effect of the mineral nitrogen (450 kg ha-1 year-1) on the symbiotic process was observed, with reduction of nodulation and nitrogenase activity. However, there was no effect on yield, total nitrogen concentration, crude protein, non-protein nitrogen and digestibility in relation to the treatment without mineral N. The cultivars showed similar performance under different conditions, with 'Crioula Brasileira' and 'Crioula Chilena' showing the highest yield and 'Pioneer-5454' the highest forage nutritive value.
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Weidmann, Stéphanie, Lisa Sanchez, Julie Descombin, Odile Chatagnier, Silvio Gianinazzi, and Vivienne Gianinazzi-Pearson. "Fungal Elicitation of Signal Transduction-Related Plant Genes Precedes Mycorrhiza Establishment and Requires the dmi3 Gene in Medicago truncatula." Molecular Plant-Microbe Interactions® 17, no. 12 (December 2004): 1385–93. http://dx.doi.org/10.1094/mpmi.2004.17.12.1385.

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Suppressive subtractive hybridization and expressed sequence tag sequencing identified 29 plant genes which are upregulated during the appressorium stage of mycorrhiza establishment between Medicago truncatula J5 (Myc+) and Glomus mosseae. Eleven genes coding plant proteins with predicted functions in signal transduction, transcription, and translation were investigated in more detail for their relation to early events of symbiotic interactions. Expression profiling showed that the genes are activated not only from the appressorium stage up to the fully established symbiosis in the Myc+ genotype of M. truncatula, but also when the symbionts are not in direct cell contact, suggesting that diffusible fungal molecules (Myc factors) play a role in the induction of a signal-transduction pathway. Transcript accumulation in roots of a mycorrhiza-defective Myc- dmi3 mutant of M. truncatula is not modified by appressorium formation or diffusible fungal molecules, indicating that the signal transduction pathway is required for a successful G. mosseae-M. truncatula interaction leading to symbiosis development. The symbiotic nodulating bacterium Sinorhizobium meliloti does not activate the 11 genes, which supposes early discrimination by plant roots between the microbial symbionts.
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Dissertations / Theses on the topic "Symbiotic relation"

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Cotin-Galvan, Laetitia. "Relation plante-hôte / Frankia dans les symbioses actinorhiziennes : cas particulier des souches non-isolables capables de sporuler in-planta." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10183/document.

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La sporulation est un phénomène présent chez de nombreux microorganismes, généralement impliqué dans les mécanismes de dispersion et/ou résistance en conditions environnementales défavorables. La sporulation observée chez certaines souches de Frankia (genre actinobactérien fixateur d'azote) lors de leur interaction symbiotique avec les plantes actinorhiziennes est donc paradoxale dans un contexte où la bactérie bénéficie d'une niche écologique favorable à son développement. Ces souches particulières de Frankia, dites Sp+, représentent un modèle unique de symbiote capable de sporulation au sein même des cellules de son hôte. Le rôle écologique et le sens évolutif de cette sporulation in-planta reste à ce jour peu élucidé. Les deux principaux objectifs de ce travail de thèse visent donc à (i) comprendre l'influence de la sporulation in-planta sur les capacités symbiotiques des souches Sp+, en termes d'infectivité et de compétitivité et (ii) appréhender l'impact de cette sporulation sur le fonctionnement du complexe symbiotique par une méthode de profilage métabolique. Ces travaux ont permis de confirmer les particularités symbiotiques des souches Sp+ (infectivité et compétitivité accrues) et de montrer des différences significatives dans le métabolisme primaire et secondaire du complexe symbiotique associées à la présence de spores de Frankia
Sporulation is a phenomenon present in many microorganisms, usually involved in the mechanisms of dispersion and/or resistance to unfavorable environmental conditions. Sporulation occurs in some Frankia strains (a diazotrophic actinobacteria) during their symbiotic interaction with actinorhizal plants, which is paradoxical in a context where the bacterium has a favorable ecological niche for its development. These particular Frankia strains, called Sp+, represent a unique model of symbiont capable of sporulation within the host cells. The ecological role and the evolutionary meanings of this in-planta sporulation still remain understood. The two main objectives of this thesis aimed to (i) understand the influence of in-planta sporulation on the symbiotic capacity of Sp+ strains in terms of infectivity and competitiveness and (ii) understand the impact of this sporulation on the functioning of the symbiotic complex by a metabolic profiling approach. These studies have confirmed the symbiotic characteristics of Sp+ strains (greater infectivity and competitiveness) and have shown significant differences in the primary and secondary metabolism of the symbiotic complex associated with the presence of Frankia spores
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Hayes, Roger. "Public relations and public diplomacy : symbiosis and reformulation." Thesis, University of Reading, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.557254.

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This thesis asks the question, how should public relations as a discipline evolve, bearing in mind the cross-frontier impact of new and traditional media and the impact of globalisation, with companies asked to do more and governments able to do less. It argues public relations theory is overly ethnocentric, despite dramatic changes in the communication, political and economic environment and that there is a need to embrace adjacent disciplines such as public diplomacy if it is to become more credible and strategically relevant. Following an interpretative paradigm in the qualitative tradition, data were collected using 56 in-depth interviews of senior practitioners of public relations and diplomacy, largely in two developing and two developed countries. Data were analysed using grounded methods and thematic content analysis, helping illustrate data and ease presentation for the reader. The findings indicated there is a convergence of disciplines and practice, including cross-transfer of diplomats to the private sector and public relations practitioners to government service. They showed that diplomats are engaging in more media relations, commercial activity and broader stakeholder outreach. While public relations practitioners need to add an understanding of international politics and culture to their knowledge of business and communication. However, despite growing opportunities for public relations as a result of new media, advising governments, a broader role for business, complex issues requiring 1. Introduction ii narrative development and more multi-faceted, empowered stakeholders, there are challenges. It has a poor reputation. It is seen as superficial, largely remains in a tactical box and there exists a skills deficit. In particular it requires navigation, negotiation and networking skills to be learned from diplomacy. But this will require a transformation of education and training practices, particularly in developing countries, where public relations is growing fast. This study makes a theoretical contribution by expanding the thinking on the overlap between the two disciplines. They both have to adapt to the new-networked environment, needing to develop relationship and collaborative engagement strategies. In particular public relations needs to possess contextual intelligence and cultural empathy. These themes form the basis on which to further develop public relations theory, which is sorely lacking. A conceptual model has been developed. Further research should be undertaken measuring the quality of relationships with different kinds of stakeholders in different cultures. This research makes a practical contribution by guiding the public relations academy and practice towards a more integrated and balanced education and training template, and developing a ‘best of both’ tool-kit. The symbiosis of the two disciplines indicated by this research and the further integration with public affairs and corporate responsibility should help public relations add value to its theory and practice. This would help it become more credible and strategically relevant for the 21st century global environment.
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Milligan, Roger Simon. "Searching for symbiosis : pastoralist-farmer relations in North-east Nigeria." Thesis, University of Sussex, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250010.

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Harzallah, Debbabi Sonia. "La relation symbiotique." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE3020/document.

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L’ubiquité de la symbiose bactérienne, et sa présence à tous les niveaux de l’organisation biologique, bouleverse toute la science du vivant. Aujourd’hui, malgré le profond renouvellement de la biologie, de la médecine et de la philosophie de la biologie, il manque une approche de la relation symbiotique même, de son établissement et de son évolution. Au cours de ce travail, nous montrons que l’ubiquité de la symbiose et sa diversité rendent difficile la détermination d’un modèle particulier pour répondre à toute la complexité de la relation. Pour pallier cette difficulté, proposons de suivre un caractère particulier : le métabolisme syntrophique, solution évolutionnaire commune à toutes les symbioses et l’utilisons comme base de l’analyse. Par une approche évolutionnaire des mécanismes moléculaires et cellulaires, nous démontrons le caractère obligatoire de toute symbiose en établissant la dépendance des partenaires les uns aux autres. Le microbiote, formé des communautés bactériennes symbiotiques, est un organe évolutionnaire intégré fonctionnellement à l’organisme hôte. Les bactéries symbiotiques sont des agents d’homéostasie qui permettent aux organismes hôtes de s’adapter aux fluctuations des conditions environnementales. Cette fonction homéostatique est à l’origine d’une structuration réciproque entre les partenaires symbiotiques, donnant lieu à un holobionte avec une reproduction hybride et une héritabilité étendue. En analysant la symbiose intestinale bactérienne chez l’humain, nous établissons l’interaction codéveloppementale et coévolutionnaire des partenaires, et démontrons l’extension de la structuration réciproque métabolique vers une structuration cognitive qui passe par les systèmes immunitaire et neurologique chez les organismes supérieurs. En démontrant l’intrication du métabolisme avec l’information nous proposons une perspective informationnelle de la symbiose. L’échange d’informations significatives entre l’hôte et son microbiote définit l’organisation informationnelle du holobionte
The pervasiveness of bacterial symbiosis and its omnipresence at every level of the biological organization deeply trouble life sciences. Today, despite biological, medical and philosophical renewal, a relational perspective analyzing the symbiotic relation, and the establishment and evolution of symbiosis is still lacking. In this work, we reveal difficulties to adopt an appropriate symbiosis model covering the complexity of the diverse and ubiquitous relation, and we propose to analyze the syntrophic metabolism as a common feature to all symbiosis. We apply an evolutionary approach to study molecular and cellular mechanisms, and we demonstrate the reciprocal dependency of symbiotic partners determining an obligatory symbiosis. The microbiota composed of symbiotic bacterial communities is an evolutionary homeostatic organ, functionally integrated in its host organism. Symbiotic bacteria are homeostatic agents that allow host organisms to adapt to fluctuations in environmental conditions. This homeostatic function enables the reciprocal scaffolding between symbiotic partners, resulting in a holobiont characterized by a hybrid reproduction and an extended inheritance. The analysis of bacterial symbiosis in human gut demonstrates the partner’s coevolutionary and codevelopmental interaction and determines the extension of the reciprocal metabolic scaffolding to a cognitive scaffolding based on immune and neurological systems in higher organisms. We demonstrate the entanglement of metabolism and information, and propose an informational perspective to define the symbiosis. This establishes an informational organization of the holobiont through the exchange of significant information between the host and its microbiota
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Fraga-Beddiar, Arifa. "Interactions entre les symbiotes mycorhiziens et les symbiotes fixateurs d'azote chez l'aulne glutineux (alnus glutinosa L. Gaertin)." Nancy 1, 1987. http://www.theses.fr/1987NAN10335.

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Keller, Jean. "La symbiose fixatrice d'azote au sein du genre Lupinus : histoire évolutive, aspects fonctionnels et gènes symbiotiques dans un contexte de spécificité hôte-symbiote." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1B036.

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La symbiose entre les légumineuses et les Rhizobiacées est la source d’azote fixé la plus importante pour le bon fonctionnement des écosystèmes naturels et agricoles. Très étudiée chez des légumineuses modèles, certains aspects de cette interaction restent peu connus ; c’est le cas des mécanismes génétiques et fonctionnels qui contrôlent la spécificité hôte-symbiote. Il n’y a que peu d’études globales consacrées à ce phénomène, et les gènes symbiotiques sont très peu connus chez les espèces non-modèles. Dans ce contexte, nous avons étudié un cas de changement de spécificité symbiotique remarquable chez des espèces phylogénétiquement proches du genre Lupinus (Fabacées). Tout d’abord, la reconstruction et l’analyse de génomes chloroplastiques complets a permis de camper le cadre évolutif de la symbiose en générant de nouveaux marqueurs d’intérêt pour clarifier la phylogénie et l’évolution des lupins. A partir d’une expérimentation d’inoculation croisée impliquant trois espèces de lupins méditerranéens et deux souches compatibles et incompatibles de Bradyrhizobium, une approche RNA-Seq a permis de produire les premiers nodulomes de lupin et d’identifier les gènes symbiotiques. L’analyse des gènes différentiellement exprimés a montré que la spécificité symbiotique affecte non seulement la voie de signalisation et de régulation de la symbiose, mais également une diversité de voies métaboliques associées. Enfin, l’étude de la dynamique évolutive et fonctionnelle de quelques gènes a mis en évidence l’impact et l’importance des phénomènes de duplication aux différents niveaux de la cascade génétique symbiotique
Legumes-Rhizobia symbiosis is the most important fixing nitrogen source for the good functioning of both natural and agricultural ecosystems. Although, it is extensively studied in model legumes, some aspects of this interaction remain unclear, such as the genetic and functional mechanisms controlling the host-symbiont specificity. Large scale studies of this process are scarce and symbiotic genes are not well described in non-model species. In this context, the effect of symbiotic specificity was investigated in phylogenetically close relative species belonging to the Lupinus genus (Fabaceae). First, the reconstruction and analysis of complete chloroplast genomes allowed us to generate new and useful markers for clarifying the Lupinus phylogeny in order to lighten the evolutionary context of the symbiosis. Following a cross-inoculation experiment of three Mediterranean lupine species with two compatible or incompatible Bradyrhizobium strains, a RNA-Seq approach allowed the reconstruction of the first lupine nodulomes and the identification of lupine symbiotic genes. The analysis of differentially expressed genes revealed that the symbiotic specificity affects not only the signalling and regulatory symbiotic pathways, but also diverse associated metabolic pathways. Finally, evaluating the evolutionary and functional dynamics of genes highlighted the importance of gene and genome duplication events at different steps of the symbiotic genetic pathway
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Sicard, Mathieu. "Modalités écologiques et évolutives des interactions entre les nématodes entomopathogènes Steinernema et leurs symbiotes bactériens Xenorhabdus." Montpellier 2, 2003. http://www.theses.fr/2003MON20193.

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Grellier, Brigitte. "Approche biotechnologique des mycorhizes : culture in vitro et physiologie des associations ectomycorhiziennes." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37605677t.

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Schmitz, Antonin. "Interactions immunité-parasitisme et immunité-symbiose chez les insectes : apport de deux modèles biologiques : drosophile-parasitoïde et puceron-symbiotes-parasitoïde." Nice, 2012. http://www.theses.fr/2012NICE4030.

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Le monde du vivant est caractérisé par une très grande diversité d’interactions biologiques qui diffèrent notamment par les bénéfices conférés aux différents protagonistes. Elles s’inscrivent ainsi dans un continuum d’effets phénotypiques allant du parasitisme au mutualisme. Le système immunitaire des organismes hôtes constitue un élément central de l’établissement et de l’évolution des associations entre organismes, notamment lorsque l’un des protagonistes vit à l’intérieur de l’autre (endoparasites et endosymbiotes). Mes travaux de thèse se sont articulés autour de l’étude des interactions immunitaires hôtes-parasitoïdes et hôtes-parasitoïtes-symbiotes chez deux espèces hôtes « modèles » : Drosophila melanogaster et le puceron du pois (Acyrthosiphon pisum. Ces espèces diffèrent par leur position phylogénétique, leur mode de reproduction et de développement et par l’état d’avancement des connaissances des acteurs moléculaires et cellulaires impliqués dans l’immunité. Les parasitoïdes sont des insectes dont les stades larvaires sont parasitaires d’un hôte qui mourra à l’issue de l’interaction. Dans le cas des endoparasitoïdes, les œufs sont pondus à l’intérieur du corps de l’hôte et le succès parasitaire dépend de la capacité du parasite à réguler les défenses immunitaires de l’hôte, généralement via l’injection du venin. Le système D. Melanogaster – L. Boulardi est des modèles hôte parasitoïde dont la résistance de l’hôte et la virulence du parasitoïde ont été les mieux caractérisés au niveau des facteurs impliqués. Certaines souches de ce parasitoïde sont extrêmement virulentes contre D. Melanogaster tandis que d’autres sont incapables de se développer sur cet hôte. Dans ce contexte, nous avons recherché l’origine du polymorphisme de virulence de L. Boulardi et montré qu’il est associé à des variations d’expression d’un facteur immunosuppresseur majeur du venin, une protéine RacGAP induisant une déformation des cellules immunitaires de D. Melanogaster. Le puceron A. Pisum vit en association obligatoire avec la bactérie Buchnera aphidicola et peut abriter différents symbiotes bactériens facultatifs. Certains peuvent conférer des traits phénotypiques remarquables à l’hôte tels que la spécialisation sur la plante hôte ou la résistance à des champignons pathogènes (Regiella insecticola ; Ri) , l’adaptation à la chaleur (Serratia symbiotica ; Ss) ou la résistance au parasitoïde Aphidius ervi (Hamiltonella defensa ; Hd). L’annotation récente du génome de A. Pisum a mis en évidence un répertoire immunitaire fortement réduit (notamment par rapport à D. Melanogaster) et il a été suggéré que ceci pourrait représenter une adaptation à la vie en symbiose. Dans ce contexte, j’ai entrepris d’améliorer notre connaissance de l’immunité cellulaire d’A. Pisum puis d’étudier l’immunocompétence de cette espèce en lien avec son « statut » symbiotique. J’ai tout d’abord caractérisé de façon détaillée les différents types hémocytaires de A. Pisum et montré qu’ils mettent en place une réponse immunitaire fonctionnelle. Mon travail prouve également que les hémocytes de puceron sont capables de phagocyter les différents symbiotes, leur devenir semblant différent selon le symbiote. J’ai ensuite analysé la composante cellulaire (nombre et aspect des hémocytes) et une composante importante de l’immunité humorale (l’activité phénoloxydase, PO en fonction du génotype de l’hôte et de la présence de Ri, Ss et Hd, grâce à l’utilisation de lignées de pucerons artificiellement infectées. Les résultats mettent en évidence de forts effets de la présence de certains symbiotes sur ces deux composantes immunitaires, ces effets étant variables suivant le symbiote considéré, et selon la souche de symbiote. Mon travail met donc en évidence une forte interaction entre capacité immunitaire de l’hôte et statut symbiotique chez les pucerons. Les interactions immunitaires entre le parasitoïde A. Ervi et A. Pisum ont été abordées de façon préliminaire et semblent compatibles avec l’hypothèse d’une stratégie d’immunoévasion de A. Ervi
This manuscript deals with immune interactions in host-parasitoid and host-parasitoid-symbionts systems in two host model species : Drosophila melanogaster and the pea aphid Acyrthosiphon pisum. The host-parasitoid system D. Melanogaster – L. Boulardi present both a polymorphism in host resistance and parasitoid virulence and factors involved are well characterized. We address the origin of the polymorphism of virulence of L. Boulardi, and shown to be associated with variations in expression of a major immunosuppressive factor from the venom, which induces a deformation of the immune cells of D. Melanogaster. A. Pisum lives in symbiosis with the mutualistic bacteria B. Aphidicola and can harbour different facultative secondary symbionts, some many confer different phenotypic traits to their host (eg resistance to parasitoids od fungal pathogens). The recent annotation of the genome of A. Pisum showed an apparently reduced immune repertoire which suggests an adaptation to symbiosis’ lifestyle. The first part of the work presented is a detailed characterization of A. Pisum cellular immunity (hemocytes’ types, functions, and response of the hemocytes to the presence of symbionts) and suggests an apparent functional immunity in the pea aphid. The second part of this work is a comparative study of the immunocompetence of A. Pisum (hemocytes and phenoloxidase activity), depending on host genotype, the presence of different symbionts, and the origin of the infection (natural vs. Artificial). It demonstrates a strong interaction between host immune capacities and symbiotic status in aphids
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Driscoll, Timothy. "Host-Microbe Relations: A Phylogenomics-Driven Bioinformatic Approach to the Characterization of Microbial DNA from Heterogeneous Sequence Data." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/50921.

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Plants and animals are characterized by intimate, enduring, often indispensable, and always complex associations with microbes. Therefore, it should come as no surprise that when the genome of a eukaryote is sequenced, a medley of bacterial sequences are produced as well. These sequences can be highly informative about the interactions between the eukaryote and its bacterial cohorts; unfortunately, they often comprise a vanishingly small constituent within a heterogeneous mixture of microbial and host sequences. Genomic analyses typically avoid the bacterial sequences in order to obtain a genome sequence for the host. Metagenomic analysis typically avoid the host sequences in order to analyze community composition and functional diversity of the bacterial component. This dissertation describes the development of a novel approach at the intersection of genomics and metagenomics, aimed at the extraction and characterization of bacterial sequences from heterogeneous sequence data using phylogenomic and bioinformatic tools. To achieve this objective, three interoperable workflows were constructed as modular computational pipelines, with built-in checkpoints for periodic interpretation and refinement. The MetaMiner workflow uses 16S small subunit rDNA analysis to enable the systematic discovery and classification of bacteria associated with a host genome sequencing project. Using this information, the ReadMiner workflow comprehensively extracts, assembles, and characterizes sequences that belong to a target microbe. Finally, AssemblySifter examines the genes and scaffolds of the eukaryotic genome for sequences associated with the target microbe. The combined information from these three workflows is used to systemically characterize a bacterial target of interest, including robust estimation of its phylogeny, assessment of its signature profile, and determination of its relationship to the associated eukaryote. This dissertation presents the development of the described methodology and its application to three eukaryotic genome projects. In the first study, the genomic sequences of a single, known endosymbiont was extracted from the genome sequencing data of its host. In the second study, a highly divergent endosymbiont was characterized from the assembled genome of its host. In the third study, genome sequences from a novel bacterium were extracted from both the raw sequencing data and assembled genome of a eukaryote that contained significant amounts of sequence from multiple competing bacteria. Taken together, these results demonstrate the usefulness of the described approach in singularly disparate situations, and strongly argue for a sophisticated, multifaceted, supervised approach to the characterization of host-associated microbes and their interactions.
Ph. D.
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Books on the topic "Symbiotic relation"

1

The symbiotic character. New York: W.W. Norton, 1991.

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Giovannini, Paolo, ed. Teorie sociologiche alla prova. Florence: Firenze University Press, 2009. http://dx.doi.org/10.36253/978-88-6453-045-1.

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Intellectual integrity and a challenge to rhetoric are the two strategic objectives of those who take up the hazardous path of sociological knowledge. This book does not presume to respond fully, but at least attempts to target these aims. The fruit of many years' teaching and research experience, it adopts a line of interpretation that highlights the point of view of the social agent considered in his close, symbiotic and procedural relation with the society in which he acts; this society is not abstract and generic but explored and construed in the tangible dimension of daily life and social relations. The book is organised with a practically identical layout in all the chapters: in dialogue format it proceeds from the identification of the categories central to the issue addressed through to its empirical application/s, hinging the two together with contributions from the sociological school or writer most relevant to the subject in question.
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1937-, Tōyama Jun, and Hashiuchi Takeshi 1944-, eds. Tabunka kyōsei shakai e no tenbō: Symbiotic multicultural societies : a perspective. Tōkyō: Nihon Hyōronsha, 2000.

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1974-, Watanabe Lisa, ed. Symbiotic realism: A theory of international relations in an instant and an interdependent world. Zürich: Lit, 2007.

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Abrami, Regina M. Gourou's symbiotic villages revisited: Inter-village relations, socioeconomic differentiation, and the place of the past in northern Vietnam. [Berkeley]: Institute of International Studies, University of California at Berkeley, 1995.

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Between Muslim and Jew: The problem of symbiosis under early Islam. Princeton, N.J: Princeton University Press, 1995.

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1937-, Yamazawa Ippei, Imai Kenʼichi, Ajia Keizai Kenkyūjo (Japan), and Nihon Bōeki Shinkōkai, eds. China enters WTO: Pursuing symbiosis with the global economy. Chiba-shi: Institute of Developing Economies, Japan External Trade Organization, 2001.

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Karapostolēs, Vasilēs. Symviōsē kai epikoinōnia stēn Hellada. Athēna: Ekdoseis "Gnōsē", 1987.

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Karapostolēs, Vasilēs. Symviōsē kai epikoinōnia stēn Hellada. 2nd ed. [Greece]: Ekdoseis Alexandreia, 1999.

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Karapostolēs, Vasilēs. Symviōsē kai epikoinōnia stēn Ellada. Athēna: Ekdoseis "Gnōsē", 1987.

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Book chapters on the topic "Symbiotic relation"

1

Tinker, P. B. "Conditions in the Rhizosphere in Relation to Microbial Development." In Recognition in Microbe-Plant Symbiotic and Pathogenic Interactions, 413–21. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-71652-2_41.

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de Greef, Tjerk, Kees van Dongen, Marc Grootjen, and Jasper Lindenberg. "Augmenting Cognition: Reviewing the Symbiotic Relation Between Man and Machine." In Foundations of Augmented Cognition, 439–48. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-73216-7_51.

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Cervone, F., G. De Lorenzo, L. Degrà, and G. Salvi. "Interaction of Fungal Polygalacturonase with Plant Proteins in Relation to Specificity and Regulation of Plant Defense Response." In Recognition in Microbe-Plant Symbiotic and Pathogenic Interactions, 253–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-71652-2_24.

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Gianinazzi-Pearson, V., A. Gollotte, C. Cordier, and S. Gianinazzi. "Root Defence Responses in Relation to Cell and Tissue Invasion by Symbiotic Microorganisms : Cytological Investigations." In Developments in Plant Pathology, 177–91. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0189-6_10.

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Gamberini, Luciano, and Anna Spagnolli. "Towards a Definition of Symbiotic Relations Between Humans and Machines." In Symbiotic Interaction, 1–4. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57753-1_1.

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Chalupa, Marek, Tomáš Jašek, Jakub Novák, Anna Řechtáčková, Veronika Šoková, and Jan Strejček. "Symbiotic 8: Beyond Symbolic Execution." In Tools and Algorithms for the Construction and Analysis of Systems, 453–57. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-72013-1_31.

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AbstractSymbiotic 8 extends the traditional combination of static analyses, instrumentation, program slicing, and symbolic execution with one substantial novelty, namely a technique mixing symbolic execution with k-induction. This technique can prove the correctness of programs with possibly unbounded loops, which cannot be done by classic symbolic execution.Symbiotic 8 delivers also several other improvements. In particular, we have modified our fork of the symbolic executorKleeto support the comparison of symbolic pointers. Further, we have tuned the shape analysis toolPredator(integrated already inSymbiotic 7) to perform better onllvmbitcode. We have also developed a light-weight analysis of relations between variables that can prove the absence of out-of-bound accesses to arrays.
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Cecchin, Andrea, Roberta Salomone, Pauline Deutz, Andrea Raggi, and Laura Cutaia. "Relating Industrial Symbiosis and Circular Economy to the Sustainable Development Debate." In Industrial Symbiosis for the Circular Economy, 1–25. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36660-5_1.

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Fultz, Micheal, and Amanda Smith. "Symbiotic Relations between ACS Local Sections and Student Member Chapters - A Case Study." In ACS Symposium Series, 15–24. Washington, DC: American Chemical Society, 2016. http://dx.doi.org/10.1021/bk-2016-1230.ch003.

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Li, Nan. "Explaining the Evolution of Civil-Military Relations from Symbiosis to Quasi-Institutionalization in China." In Civil-Military Relations in Post-Deng China, 217–39. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6442-0_6.

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Audet, Patrick. "Arbuscular Mycorrhizal Symbiosis and Other Plant–Soil Interactions in Relation to Environmental Stress." In Environmental Adaptations and Stress Tolerance of Plants in the Era of Climate Change, 233–64. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4614-0815-4_11.

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Conference papers on the topic "Symbiotic relation"

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Smits, Joris. "Shaping Forces; the symbiotic relation between structure and architecture." In IABSE Symposium, Vancouver 2017: Engineering the Future. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2017. http://dx.doi.org/10.2749/vancouver.2017.1369.

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Rotaru, Vladimir. "Efecutul rhizobacteriilor benefice asupra formării sistemului simbiotic Glycine Max-Bradyrhizobium Japonicum în funcţie de fertilizare şi nivelul de umiditate a solului." In International Scientific Symposium "Plant Protection – Achievements and Prospects". Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2020. http://dx.doi.org/10.53040/9789975347204.74.

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A pot experiment under controlled soil moisture conditions was accomplished with the aim to assess the effect of rhizobacteria application Bradyrhizobium japonicum alone or in conjuction with Pseudomonas putida strain on symbiotic system development of soybean in relation to phosphorus and manure fertilization under temporary drought conditions. Mineral and organic fertilizers were applied during filling pots with soil. A half of plants were subjected to moderate drought for 12 days at flowering stage. The experimental results showed that number of nodules increased after rhizobacteria application under mineral as well as under organic fertilization irrespective of soil moisture levels. The highest effect of rhizobacteria was registered in plants under normal irrigation conditions. Experimental data find out that combined application of two rhizobacteria strains displayed synergic effect on nodules development. Thus, the results suggested that application of B. japonicum and Pseudomonas putida strains as biofertilizer contributed to enhance tolerance of soybean plants and promote nodules development under water limited conditions.
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Hosoda, Ryusuke, Koichi Hanano, and Yoichi Fukutani. "Promotion of Symbiotic Relationship Between Human and Ecosystems in a Small Island." In ASME 2003 22nd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2003. http://dx.doi.org/10.1115/omae2003-37325.

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People have become aware that maintenance of symbiotic relations between people and their surrounding environment is important not only for people’s happiness but also for their own existence on the earth system. Facing up to reality, however, there have arisen matters of regret caused by the human lives and activities. One of big problems we have to consider is scatter of waste and debris on natural beaches, especially in the coastal area near the dense populated area. We have to remember that the scatter is the results of human activities mainly on the coastal land area. The problem had become serious on a small island located near the mouth of Osaka Bay, where rubbishes such as tins, bottles and plastic bottles, bags and sheets have been piled and remained on the beach for more than half a century. People living in a small community, who were worrying about the decline of the ecosystem of the small island, started the activity of beach cleaning more than ten years ago. Since then, the quality of the ecosystem on the island has been maintained in a permissible condition. They also started the field researches on the fauna and flora in and around the island to make an inventory of fauna and flora. Their activities were appreciated and they were honored with testimonials commending their contribution on the maintenance of symbiosis. In the present paper, people’s activities are introduced with the importance of promoting the symbiosis with ecosystem in surrounding natural environments.
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Luan, Xiaoying, and Yi Zhang. "A study on the mode of public participation in Chinese urban design under the concept of multi-body participation. Community building oriented with multi-age participation." In Post-Oil City Planning for Urban Green Deals Virtual Congress. ISOCARP, 2020. http://dx.doi.org/10.47472/gxie2200.

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With the society and economy of China entering the transition period, people's requirements for urban life show a trend of diversification and high standards. Urban design is no longer limited to physical space but starts to carry out multi-angle and multi-level comprehensive consideration on the social and spatial problems of symbiosis. In this context, the innovative social governance and the quality improvement of urban public space that highlights the role of the public have become hot topics. As the main body of city users, ordinary people entering into the deep and substantial participation from the superficial and symbolic is the only way for urban design to transform from the expert-led "optimal scheme" to the "reasonable scheme" recognized by pluralistic bodies. In the process of western democratic politics, the participation theory that focuses on the construction of micro democracy is prevalent, and the public participation based on pluralism has become the theoretical basis for the planning participation. Besides, the concept of communicative planning and collaborative planning, which emphasize cooperation and consultation, also enriches the connotation of multiple participation. Due to different systems and awareness, it is difficult to promote public participation under China's national conditions. Community building, the interdisciplinary product of urban design and social governance under communities, is regarded as the experimental field for participating in the reform. Therefore, under the current administrative system and regulations, this paper tries to make use of the grass-roots management mode with Chinese characteristics to establish an inclusive multi-participation mechanism. It allows residents of different ages can go deep into the process of community building by taking the family unit. Meanwhile, some suggestions and strategies are raised for effective participation. We hope the bottom-up process of urban design in microscale can be an effective instrument to reflect the public's will and repair social relations at the same time, while explore and solve urban problems in diverse cooperation.
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