Dissertations / Theses on the topic 'Bacterial symbiont'
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Russell, Shelbi Lianne. "Mode and Fidelity of Bacterial Symbiont Transmission and Its Impact on Symbiont Genome Evolution." Thesis, Harvard University, 2016. http://nrs.harvard.edu/urn-3:HUL.InstRepos:33493576.
Full textBiology, Organismic and Evolutionary
Beinart, Roxanne Abra. "Linking bacterial symbiont physiology to the ecology of hydrothermal vent symbioses." Thesis, Harvard University, 2013. http://dissertations.umi.com/gsas.harvard:11270.
Full textPeterson, Brittany F., and Michael E. Scharf. "Metatranscriptome analysis reveals bacterial symbiont contributions to lower termite physiology and potential immune functions." BIOMED CENTRAL LTD, 2016. http://hdl.handle.net/10150/621516.
Full textGibson, Cara. "Heritable Microbial Endosymbionts in Insects: Insights from the Study of a Parasitic Wasp and its Cockroach Host." Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/195875.
Full textHansen, Thorsten. "IDENTIFYING MECHANISMS OF HOST PLANT SPECIALIZATION IN APHIS CRACCIVORA AND ITS BACTERIAL SYMBIONTS." UKnowledge, 2018. https://uknowledge.uky.edu/entomology_etds/42.
Full textWilson, Alex, Helen Dunbar, Gregory Davis, Wayne Hunter, David Stern, and Nancy Moran. "A dual-genome microarray for the pea aphid, Acyrthosiphon pisum, and its obligate bacterial symbiont, Buchnera aphidicola." BioMed Central, 2006. http://hdl.handle.net/10150/610396.
Full textKönig, Sten. "The bacterial symbiont in the shallow water lucinids Codakia orbicularis and C. orbiculata analyzed by physiological proteogenomics." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066700.
Full textThe shallow water bivalves Codakia orbicularis and Codakia orbiculata, both belonging to the family Lucinidae, harbor endosymbiotic sulfur-oxidizing gamma-Proteobacteria in their gills. The bivalves live in seagrass beds of Thalassia testudinum and harbor the same bacterial symbionts according to 16S rDNA sequence analysis. During starvation, the symbiont population decreases while no release of symbionts were observed. We observed lysosomal enzyme activity during sulfide and food starvation with cytochemical staining methods. We suggest that the host uses symbionts as a nutrient source to survive a hunger crisis. The carbon transfer from the symbionts to the host could be flexible and could consist in transfer of organic matter, "milking", under normal feeding conditions and digestion of the symbionts, "farming", under starved conditions. Until now the symbiont alone is not cultivable. Therefore, cultivation-independent techniques, like -omics approaches were used to analyze the physiology of the symbiont. Next generation sequencing (NGS) was employed to sequence the genomes of symbionts from both hosts, display the backbone for proteomics. The soluble- and membrane-associated symbiont proteomes were analyzed during different conditions. The oxidation of sulfide is one key metabolic pathway of the Codakia symbiont, most probably using the periplasmic Sox-system, a cytoplasmatic sulfite reductase (DsrAB), an APS reductase (AprAB) and an ATP sulfurylase (SopT). Furthermore, indications for two additional putative sulfide oxidation systems in the periplasmic space, the sulfide quinone reductase (Sqr) and the sulfide dehydrogenase (FccAB), could be found. The Calvin Benson Bassham cycle (CBB) of the symbiont is not completely encoded in the genome. The key genes, RuBisCO, are abundantly expressed. It is assumed that the regeneration of the ribulose-1,5-bisphosphate is performed unconventionally via a PPi-dependent phosphofructokinase. Another feature of the CBB is that two different forms of RuBisCO are encoded in the genome. Both are expressed at the same time, but RuBisCO form I is about 50x times more expressed. Additional to the autotrophic lifestyle, all genes for the heterotrophic lifestyle are encoded in the genome. In the proteome, the enzymes related to glycolysis and TCA-cycle were low expressed. Interestingly, proteins for glycogen metabolism were identified in the proteome. Additionally, several types of transporters like ABC, TRAP and PTS are encoded in the genome. In the proteome several indications were found for an expression of these transporters, even in the endosymbiotic lifestyle. Unexpectedly, in the genome a nif gene cluster is encoded for gaseous nitrogen fixation as ammonium source. The key genes, the nitrogenase NifH/K/D, were abundantly identified in proteome. Further, the proteome analyses indicate a strictly down-regulation of these proteins under starvation conditions. Rubrerythrin, a strongly expressed protein and is predicted to protect the nitrogenase against oxygen stress. The bacterial endosymbionts encode a specialized secretion system type 6 (T6SS) for the transport of bacterial effector molecules through the membranes to the host cytoplasm and display one possibility for a direct "communication" with the host. In summary, genomics and proteomics analyses of the Codakia symbiont improved the knowledge about the metabolism of the symbiont in lucinid bivalves.. The genomics and proteomics data generated in this study can be used as a basis for further in-depth analyses of the physiology of the symbionts and interaction with the host
Flórez, Laura Victoria [Verfasser], Martin [Gutachter] Kaltenpoth, Christian [Gutachter] Hertweck, and Martha S. [Gutachter] Hunter. "Burkholderia as bacterial symbionts of Lagriinae beetles : symbiont transmission, prevalence and ecological significance in Lagria villosa and Lagria hirta (Coleoptera: Tenebrionidae) / Laura Victoria Flórez ; Gutachter: Martin Kaltenpoth, Christian Hertweck, Martha S. Hunter." Jena : Friedrich-Schiller-Universität Jena, 2017. http://d-nb.info/117760261X/34.
Full textWilkinson, Peter Graham. "Characterisation of the bacterial flora associated with the grey field slug Deroceras reticulatum and assessment of its suitability as a target for biological control." Thesis, University of Edinburgh, 2011. http://hdl.handle.net/1842/5276.
Full textAndam, Cheryl Marie Palacay. "Role of lateral gene transfer in the evolution of legume nodule symbionts." Diss., Online access via UMI:, 2007.
Find full textBLACUTT, JACOB. "GENOME ANALYSIS OF BACTERIAL SYMBIONTS ASSOCIATED WITH HAPTOPHYTE PRYMNESIUM PARVUM." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/612639.
Full textOliver, Kerry M. "The role of pea aphid bacterial symbionts in resistance to parasitism." Diss., Tucson, Arizona : University of Arizona, 2005. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu%5Fetd%5F1031%5F1%5Fm.pdf&type=application/pdf.
Full textMcGinley, Susan. "Better Parasitic Wasps for Biological Control: Bacterial Symbionts Make a Difference." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2006. http://hdl.handle.net/10150/622173.
Full textHanekom, Thea. "Screening bacterial symbionts of marine invertebrates for ribosomally synthesized natural products." University of the Western Cape, 2016. http://hdl.handle.net/11394/5441.
Full textPharmaceutical research and development strategies rely on the constant discovery of novel natural products as potential drugs. Recent studies have shown that the microorganisms associated with sponges are the true producers of some previously isolated compounds. This study created a large collection of bacterial symbionts associated with the South African marine sponge, Hamacantha esperioides. The bioactivity assays performed, showed that 44 isolates produced compounds with antimicrobial or anti-inflammatory activity. The successful identification of novel species that produce potential natural products highlights the importance of cultivation-dependent methods. To further screen for natural products, a cultivation-independent approach was used. A sequenced-based method, based on the biosynthetic genes of polytheonamide, was developed to screen for proteusins in sponge metagenomic DNA and the genomes of bacterial symbionts. The degenerate primers could amplify the targeted genes from DNA known to contain homologues. Evaluation of the primers' specificity showed non-specific amplification of genes, some containing similar conserved domains as the target genes. This study demonstrated that the use and development of cultivation-dependent and -independent screens are important for the discovery of novel natural products from the symbiotic bacteria of South African sponges.
National Research Foundation (NRF)
Geniez, Sandrine. "Investigation of Wolbachia symbiosis in isopods and filarial nematodes by genomic and interactome studies." Thesis, Poitiers, 2013. http://www.theses.fr/2013POIT2277/document.
Full textBacteria of the genus Wolbachia are gram-negative alpha-proteobacteria present in many arthropods and filarial nematodes. These obligate intracellular bacteria are maternally inherited and induce a large number of phenotypes across the symbiosis continuum from mutualism to parasitism, including feminization (F), cytoplasmic incompatibility (CI) or male killing. Studying Wolbachia symbioses is therefore of particular interest in the investigation of symbiotic relationships.In Brugia malayi and other filarial nematodes, they are obligate leading to a loss of worm fertility, and eventual death upon their depletion with antibiotic. In arthropods, they rather are parasitic. In the isopod crustacean Armadillidium vulgare they cause feminization when present: genetic males develop as functional female leading to female biased sex-ratio progenies.In order to understand the molecular mechanisms of these two symbioses, we set up a new capture procedure to catch Wolbachia DNA and performed whole-genome sequencing on 8 Wolbachia strains, symbionts of isopods (F & CI). Comparative genomics led to the establishment of the Wolbachia pan-genome as well as the identification of phenotype related gene patterns. We identified 2, 5 and 3 genes that are only found in mutualist, feminizing and male killing strains, respectively. Expression of genes potentially involved in feminization and mutualism were also analyzed throughout host post-embryonic development. Host-symbiont interactome approach was then initiated by protein-protein interaction studies using bacterial proteins with eukaryote like motifs as bait in order to identify Wolbachia host targets involved in symbiosis
Scates, Sara Stuart. "Symbiont-Mediated Modification of Mosquitocide Toxicity in the Dengue Vector, Aedes aegypti." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/64171.
Full textMaster of Science in Life Sciences
Young, Simon. "Genetic features of Sodalis glossinidius, a symbiont bacterium of tsetse flies." Thesis, University of Glasgow, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274255.
Full textHe, Hongjun. "Thermal adaptation in Xenorhabdus spp., bacterial symbionts of entomopathogenic nematodes, Steinernema spp." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0014/MQ42392.pdf.
Full textKlein, Timothy Matsiko Ninsiima. "The isolation and characterisation of novel natural products from marine bacterial symbionts." University of the Western Cape, 2015. http://hdl.handle.net/11394/4747.
Full textDrug-resistant infections are a global health crisis and drastically hinder the treatment options to effectively combat disease. Today, natural products remain an important source of novel drug candidates. Micro-organisms, in addition to being a source of bioactive natural products, represent a sustainable source of these compounds. As the marine environment is largely underexplored, the oceans represent a potential source of novel NPs. This study aimed at the discovery of novel NPs from bacteria associated with novel marine invertebrate species endemic to the South African coast, including a sponge Spongia (Spongia) sp. 001RSASPN and a tunicate, Pseudodistoma africanum Millar, 1954. The methodology comprised of culture-dependent and culture-independent strategies. The former involved the isolation of bacteria associated with the invertebrate species and subsequent screening for anti-microbial activity against a panel of indicator strains including a multi-drug resistant E. coli strain. Anti-bacterial activity was detected in 6.1% and 4% of bacterial isolates from the sponge and tunicate isolates respectively. The culture-independent strategy involved the use of PCR to select bioactive strains likely to contain novel NRPS or PKS secondary metabolite pathways. An NRPS A- domain exhibiting low sequence identity (65%) to reference sequences in the NCBI database was amplified from isolate PE8-15, a strain belonging to the genus Bacillus. This predicted a novel NRPS pathway within this strain. In addition, this isolate exhibited the most diverse anti-microbial profile including anti-bacterial and anti-fungal activity (A.fumigatus ATCC 46645). Therefore, as the most promising candidate, the genome of PE8-15 was sequenced following which 10 secondary metabolite pathways including bacteriocins (5), NRPS (3), siderophore (1) and a terpene pathway were identified. The A-domain amplified from PE8-15 originated from Cluster 4, and NRPS pathway predicted to encode a lipopeptide. Lipopeptides are an important class of compounds with a range of industrial applications in the pharmaceutical, cosmetic as well as food industry. The identification of potentially novel secondary metabolite pathways from even well- studied groups of organisms demonstrates the importance of sequence-based methods in natural product discovery. Furthermore, this study highlights the South African coast as a rich source of microbial natural products and should be exploited further for drug discovery.
Salerno, Jennifer L. "Transmission and Nutritional Contribution of Dual Bacterial Symbionts in Deep-Sea Mussels." W&M ScholarWorks, 2003. https://scholarworks.wm.edu/etd/1539626398.
Full textTreanor, David. "Symbionts in societies : the biology of Wolbachia in social insects." Thesis, University of Sussex, 2018. http://sro.sussex.ac.uk/id/eprint/76440/.
Full textHu, Kaiji. "Nematicidal properties of Xenorhabdus spp. and Photorhabdus spp., bacterial symbionts of entomopathogenic nematodes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0013/NQ52710.pdf.
Full textMatcher, Gwynneth F., Samantha C. Waterworth, Tara A. Walmsley, Tendayi Matsatsa, Shirley Parker-Nance, Michael Trevor Davies-Coleman, and Rosemary Dorrington. "Keeping it in the family: coevolution of latrunculid sponges and their dominant bacterial symbionts." John Wiley and Sons Ltd, 2016. http://hdl.handle.net/10962/65603.
Full textThe Latrunculiidae are a family of cold water sponges known for their production of bioactive pyrroloiminoquinone alkaloids. Previously it was shown that the bacterial community associated with a Tsitsikamma sponge species comprises unusual bacterial taxa and is dominated by a novel Betaproteobacterium. Here, we have characterized the bacterial communities associated with six latrunculid species representing three genera (Tsitsikamma, Cyclacanthia, and Latrunculia) as well as a Mycale species, collected from Algoa Bay on the South African southeast coast. The bacterial communities of all seven sponge species were dominated by a single Betaproteobacterium operational taxonomic unit (OTU0.03), while a second OTU0.03 was dominant in the Mycale sp. The Betaproteobacteria OTUs from the different latrunculid sponges are closely related and their phylogenetic relationship follows that of their hosts. We propose that the latrunculid Betaproteobacteria OTUs are members of a specialized group of sponge symbionts that may have coevolved with their hosts. A single dominant Spirochaetae OTU0.03 was present in the Tsitsikamma and Cyclacanthia sponge species, but absent from the Latrunculia and Mycale sponges. This study sheds new light on the interactions between latrunculid sponges and their bacterial communities and may point to the potential involvement of dominant symbionts in the biosynthesis of the bioactive secondary metabolites.
This research was supported by a SARChI grant from the South African National Research Foundation (NRF, GUN: 87583) and the Rhodes University Sandisa Imbewu Programme. S. C. W. was supported by an NRF Innovation PhD Scholarship and a Rhodes University Henderson PhD Scholarship. T. A. W. was supported by PhD Fellowships from the NRF and the German Academic Exchange Service (DAAD)
Rolim, Adrian Augusto Sosa Gómez. "Microbiota intestinal e assinatura isotópica de adultos de Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) como marcadores para a identificação da fonte alimentar de imaturos." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-05012015-155654/.
Full textThe correct insect resistant management has been a topic of constant concern, even for the newer technologies available, such as genetically modified crops expressing Bacillus thuringiensis (Bt) toxins. The use of refuge areas with non-Bt crops to avoid the fast selection for resistant insects is proposed for maintaining the efficiency of Bt-crops. The implementation of refuge areas for polyphagous insects can consider non-commercial and non-Bt crops as sources of susceptible insects. The identification of the food source used during immature development can make the implementation of refuge areas safer and more efficient and allow for better estimates of risk assessment for insect resistance development. The objective of this study is to determine the potential use of, the isotopic signature and gut microbiota of adults as biological markers to allow for the identification of the food source during the larval stage of Spodoptera frugiperda (J.E. Smith) (Lepidoptera, Noctuidae). Adults were obtained from larval rearing on 12 food sources, six host-plants with a C3 photosynthetic metabolism and six host-plants with a C4 metabolism. Part of the adults obtained and the food source used during their immature development were lyophilized and macerated, and subjected to ?13C e ?15N isotopic analysis. The remaining adults of S. frugiperda were used to determine the composition of the gut microbiota by metagenomic analysis of the V1-V3 region of the 16S rRNA gene using a 454 sequencing platform. The carbon isotopic signatures obtained for the hostplants used as food source were between -31.37? and -25.07? for C3 plants, and - 13.03? and -12.26? for C4 plants. Adults of S. frugiperda obtained from larval rearing on C3 plants had a carbon isotopic signature between -30.36? and -23.72?, while those from C4 host-plants has between -18.25? and -13.28?. The metagenomic sequencing yielded 126,970 reads with an average of 421bp. The larval food source substantially influenced the diversity of the adult gut microbiota regardless of the plant\'s photosynthesis metabolism. Comparative analysis among gut microbiota in which the relative abundance was taken into account (weight- Unifrac) allowed the discrimination of the majority of the communities. Several OTUs were identified as exclusive to the adult gut microbiota from different food sources, but most of these OTUs were minor components of the community. OTUs 1199 and 2255, both exclusively associated with corn, were the only ones to represent at least 2.5% of their community.
Lesueur, Didier. "Optimisation de la fixation d'azote dans la symbiose acacia mangium-bradyrhizobium : relations de la plante-hote et de la bacterie symbiote avec l'acidite et les oligoelements." Paris 6, 1992. http://www.theses.fr/1992PA066545.
Full textRahoo, Ali Murad. "Studies on the Pesticidal Potential of Entomopathogenic nematodes, their bacterial symbionts and the toxins they produce." Thesis, University of Reading, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.519862.
Full textRodrigues, Pedro A. D. P., and Pedro A. D. P. Rodrigues. "Bacterial Symbionts at the Colony and Individual Levels: Integration through Behavior and Morphology in a Social Insect." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/621295.
Full textVala, Salvador Filipa De Freitas. "Genetic conflicts between cytoplasmic bacteria and their mite host." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2001. http://dare.uva.nl/document/59417.
Full textConway, James G., and James G. Conway. "The Effects of the Symbiont Rickettsia on the Interactions Between a Whitefly Pest (Bemisia Tabaci) and a General Fungal Pathogen (Beauveria Bassiana)." Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/626379.
Full textWentrup, Cécilia [Verfasser], Nicole [Akademischer Betreuer] Dubilier, and Monika [Akademischer Betreuer] Bright. "Acquisition and activity of bacterial symbionts in marine invertebrates / Cécilia Wentrup. Gutachter: Nicole Dubilier ; Monika Bright. Betreuer: Nicole Dubilier." Bremen : Staats- und Universitätsbibliothek Bremen, 2012. http://d-nb.info/1072046628/34.
Full textHAGNERE, CATHERINE. "Symbioses d'amibes libres et de bacteries de l'environnement hydrique induisant une mercuri-resistance et une limitation de la proliferation de bacteries pathogenes." Strasbourg 1, 1993. http://www.theses.fr/1993STR15011.
Full textPõlajev, Aleksei. "Selfish, mobile genes in honeybee gut bacteria." Thesis, Uppsala universitet, Institutionen för biologisk grundutbildning, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-360510.
Full textKaltenpoth, Martin. "Protective bacteria and attractive pheromones - symbiosis and chemical communication in beewolves (Philanthus spp., Hymenoptera, Crabronidae)." Doctoral thesis, [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=982568959.
Full textSchimak, Mario-Philip [Verfasser], Nicole [Akademischer Betreuer] Dubilier, and Monika [Akademischer Betreuer] Bright. "Transmission of bacterial symbionts in the gutless oligochaete Olavius algarvensis / Mario-Philip Schimak. Betreuer: Nicole Dubilier. Gutachter: Nicole Dubilier ; Monika Bright." Bremen : Staats- und Universitätsbibliothek Bremen, 2016. http://d-nb.info/1084866269/34.
Full textNguyen, Van Phuong. "Plant and bacterial functions required for morphological bacteroid differentiation in the Aeschynomene-Bradyrhizobium model." Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTT158/document.
Full textThe legume species are able to form symbiotic organs, the nodules, that house soil bacteria called rhizobia. Within these nodules intracellular rhizobia differentiate into bacteroids, which are able to reduce atmospheric dinitrogen to ammonium for the benefit of the plants. In counterpart, the plants provide carbon sources to the bacteria. Recent studies on symbiotic model Medicago-Sinorhizobium showed that the nodules of M. truncatula produce a massive diversity of peptides called NCRs, which are similar to antimicrobial peptides (AMPs) of innate immune systems. These NCRs are responsible in maintaining the homeostasis between the host cells in the nodules and the large bacterial population they contain. Although many NCRs are genuine AMPs, which kill microbes in vitro, in nodule cells they do not kill the bacteria but induce them into the terminally differentiated bacteroids characterized by cell elongation, genome amplification, membrane permeability and loss of cell division capacity. However, the action mode of NCRs is still an open question. During my PhD thesis I focused on the identification of plant and bacterial functions required for bacteroid differentiation in the Aeschynomene-Bradyrhizobium model.Firstly, a new class of cysteine rich peptides (NCR-like) was identified in tropical aquatic legumes of the Aeschynomene genus, which belong to the Dalbergioid clade. These peptides govern terminal bacteroid differentiation of photosynthetic Bradyrhizobium spp. This mechanism is similar to the one previously described in Medicago suggesting that the endosymbiont differentiation in Dalbergioid and ILRC legumes is convergently evolved.Secondly, in order to identify the bacterial functions involved in bacteroid differentiation, I screened 53 fix- Tn5 mutants of the ORS278 strain on Aeschynomene indica. This screening allowed identify 8 bacterial genes, which inhibit or disorder the bacteroid differentiation. Among these identified genes, I focused on DD-CPase encoding a peptidoglycan-modifying enzyme and two genes pstC and pstB belonging to Pst-system.The characterization of DD-CPase gene demonstrated that the remodeling peptidoglycan enzyme, DD-CPase1, of Bradyrhizobium is required for normal bacteroid differentiation in host legumes that produce NCRs, in general, and in Aeschynomene spp., in particular. This prompts a possibility of direct interaction of DD-CPase1 with NCRs leading to endoreduplication of the bacteroids.Finally, I have investigated the physiological and symbiotic properties of different mutants of pstC and pstB genes. The Tn5 mutants of pstC and pstB genes of Bradyrhizobium sp. strain ORS278 severely affected symbiosis on A. indica and A. evenia. Further functional studies on pst-operon will provide deeper understanding the correlation between phosphate homeostasis and nitrogen fixation efficiency in Aeschynomene-Bradyrhizobium symbiosis.This study broadens our knowledge on the evolution of symbiosis by showing that the modus operandi involving peptides derived from innate immunity used by some legumes to keep their intracellular bacterial population under control is more widespread and ancient than previously thought and has been invented by evolution several times
Paredes, Jorge R., and Jorge R. Paredes. "Phylogeography of the Asia Ii and the Americas Major Clades of the Bemisia Tabaci Sibling Species Group." Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/626338.
Full textTéfit, Mélisandre. "Drosophila melanogaster and its bacterial partners : community dynamics and effects on animal physiology." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEN055.
Full textIn nature, symbiotic relationships are widespread, and of paramount ecological importance. Animals have appeared, evolved, and are now living constantly associated with a variety of microorganisms. In the spectrum of different symbioses types, the microbiota occupies a central and balanced part by establishing commensalistic or mutualistic relationships with its host. Over the last years, the microbiota has been extensively studied given the crucial role it plays in animal health and disease. In this research effort, Drosophila melanogaster represents a fruitful model, thanks to the ease to generate and maintain axenic flies, and the simplicity of re-associating them with a defined microbial community.The association of Drosophila with one of its natural commensals, Lactobacillus plantarum, revealed a growth-promoting effect mediated by this bacterial species. In case of nutrient scarcity, larvae associated with L. plantarum develop twice faster than the germ-free ones. However, adjusting development to environmental cues is key to organismal fitness, and yet here animals are growing fast even though the nutritional conditions are poor. We thus questioned whether what seems like an advantage could in turn be deleterious at later stages, and adversely impact adult fitness. We showed that L. plantarum is a true beneficial partner for D. melanogaster throughout the fly life cycle. Indeed, it allows the precocious emergence of mature and fertile adults without fitness drawbacks, and in certain conditions, this commensal can even increase the lifespan of nutritionally challenged males.Broader studies assessing the interaction of Drosophila with several bacterial species can inform about the dynamics of a fly microbiota. Indeed, in the environmental niche bacteria are transferred between the fly and its nutritive substrate, and these reciprocal transfers could alter the composition of the community. We addressed this question using a wild-derived microbial community and observed a high degree of similarity between the bacteria associated with the flies and the composition of the community in the diet, illustrating the stable association of the Drosophila microbiota with the fly population in the niche.Altogether these results emphasize the power of the Drosophila model in the study of the relationships between animals and their microbiota, which allows deciphering the dynamics of commensal bacterial communities and their impact on animal physiology
Weglarz, Kathryn M. "Investigating the Roles of Bacterial Endosymbionts in the Evolution of Adelgidae (Hemiptera: Sternorrhyncha)." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7645.
Full textZheng, Hao [Verfasser], and Andreas [Akademischer Betreuer] Brune. "Genome Evolution of Endomicrobia: From Free-Living Bacteria to Intracellular Symbionts of Termite Gut Flagellates / Hao Zheng. Betreuer: Andreas Brune." Marburg : Philipps-Universität Marburg, 2015. http://d-nb.info/1080299211/34.
Full textNegandhi, Karita L. "Microbial Communities with Emphasis on Coral Disease-Associated Bacteria within Florida Reef Sponges." NSUWorks, 2009. http://nsuworks.nova.edu/occ_stuetd/109.
Full textSaidin, Jasnizat Bin. "Isolation and characterization of Suberites domuncula (Olivi, 1792) associated bacteria : insights on potential molecules of communication." Lorient, 2012. http://www.theses.fr/2012LORIS269.
Full textOne hundred and fifty one cultivable bacteria were isolated from the sponge Suberifes domuncula collected in Brittany (France). This bacterial population consisted of Gammaproteobacteria (é20/0), Firmicutes (18Yo), Alphaproteobacteria (13%) and Bacteroides (7%). One hundred and fifteen were subjected to a microplate luminescence assay using E. Coli pSB40é as a reporter strain in order to determine a production of AHLs, using the supernatants at 24, 48,72 and 9é hours. These molecules are a possible mean to communicate between resident bacteria and/or the host. Both positive luminescence values as well as negative ones were obtained. After further experimentations, the negative values were the result of bacteriostatic/bactericidal effects. Among the AHLs producers 75 did not produce these molecules constantly but, at least once, during the time of the culture. Only 19 of them produced AHLs throughouttheir growth (from24 to 9é hours). Fifty two bacteria exhibited both effects (enhancement and inhibition of the luminescence), 3é showed a inhibition effect and 4 had no activity. Ln term of AHLs the productions at specific growth's time, at 24 hours of growth only 22. 31o/o of them were able to produced AHL, while at the 48 hours growth, the number of isolates that produced AHL were 42. 31o/o, then at 72 and 9é hours, the percentage of the AHL producers were 3é. 47o/o and 35. 30%, respectively. As for the production of E. Coll inhibitor compound(s) at specific growth time was 47. é9% at 24 hours of growth, 27. é9Yo at 48 hours, 47. 01% at 72 hours and 55. 29% at 9é hours. Among the AHL producers (at least once throughout the culture time), 4é out of 75 isolates (é8%) were Gammaproteobacteria, 9 (13Yo) were Alphaproteobacteria,7 (10o/o) were Firmicufes and é (9%) were Flavobacteriia. The AHLs producers within the Gammaproteobacteria were those from the genera Pseudoalteromonas (15 bacteria), Shewanella (7), Endozoicomonas (é) and Coweillia (é), Vlbrio (5), Pseudomonas (4), Microbulbifer (1) and Cobetia (1). The Alphaproteobacteria contained only one genus: Pseudovibrio with nine isolates. Fhe Flavobacteriia group contained the genus Tenacibaculum with five isolates and one from the genus F/avobacterium. Seven inducing the luminescence were from the Phylum Firmicutes. Ln this study ten isolates probably belonged to a sponge-specialist bacterial symbiont group endemic to S. Domuncula collected from the area of the study. Lndeed, the closest related bacterium for this group was an Uncultured bacterium, clone Past-O03, coming from a coral (Porites asfreiodes) (93-9é% of identity) while the closest cultivable representative was Endozoicomonas elysicola MKT110 isolated from the sea slug, Elysia ornata (91-93%). Further phylogenetic analysis of the available sequences from NCBI revealed that this group was more related to the group of the uncultured bacterium with a bootstrap value of 85% rather than to lhe Endozoicomonas group (bootstrap value: é0%). Besides, we reported for the first time, the capability of lhe Endozoicomonas family to induce luminescence relative to the production of AHLs. Among five sponge- Endozoicomonas tested, one of lhem, Endozoicomonas sp. Cdtt2, showed a possibility of AHLs production throughoutthe 9éh of culture. An other Endozoicomonas, Hex311 as for it, produced an inhibitor compound(s) al24 hours; then, from 48 to 9é hours AHLs were produced. The other three Endozoicononas displayed an inhibition of the E. Coli luminescence reporter strain throughout their growth. Nevertheless the possibility of an AHLs production cannot be neglected this one being hidden. For other studies, we selected two sponge-associated bacteria to proceed to the isolation of active compounds from their culture supernatants: Pseudoalteromonas sp. Hex322 and Pseudomonas sp. H312. The Pseudoalteromonas sp. Hex322 was choosen because it inhibited the luminescence of the E. Coli reporter strain so, produced a bacteriostatic/bactericidal compound(s). Further investigations of the fractions showed that the inhibitor compound(s) was present in the non-polar fractions while the polar fractions exhibited an anti-biofilm effect. Unfortunately, due to the minute quantity of the non-polar and polar fractions with a very polar characteristic, none of the active compounds were successfully isolated. Concerning Pseudomonas sp. H312, three pure compounds were isolated: the phenazine-1-carboxylic acid, a dirhamnolipid Cro-Cro and a glycolipid. The experiments setting in contact both bacteria showed that they seemed to be in competition, but to gain conclusive insights more experiments are needed
Dittmer, Jessica. "Diversity of endosymbiotic bacterial communities in terrestrial isopods : the role of feminizing Wolbachia and other major players." Thesis, Poitiers, 2013. http://www.theses.fr/2013POIT2322/document.
Full textIn recent years, there has been a shift of focus in symbiosis studies, away from the traditional 'one host-one symbiont' concept towards a more holistic, community-based approach. This concept takes into account that a host is not only associated with one bacterium, but harbours and interacts with a diverse bacterial community, the microbiome. Terrestrial isopods represent an excellent model system for the understanding of complex multipartite symbioses due to their well-characterised association with feminizing Wolbachia bacteria. To date, three different feminizing Wolbachia strains have been identified in Armadillidium vulgare, presumably representing different host-symbiont co-evolutionary histories. The aim of this PhD was to get a more complete picture of the terrestrial isopod microbiome and the role of Wolbachia within the bacterial community. In order to achieve this, quantitative and metagenomic techniques were combined to characterize the microbiome of A. vulgare on multiple levels: (i) Field vs. lab populations, (ii) in different host tissues, and (iii) in relation to Wolbachia infection status, i.e. presence/absence of Wolbachia as well as infection with different Wolbachia strains. Wolbachia represented the predominant member of the bacterial community in infected individuals and was identified as an important factor influencing bacterial community structure. Apart from Wolbachia, we detected a second highly abundant bacterium: Candidatus Hepatoplasma crinochetorum, a facultative symbiont previously reported from the midgut caeca, was for the first time observed in all tested host tissues. The potential interactions of Wolbachia and Ca. H. crinochetorum constitute an interesting example for symbiont-symbiont relationships between two highly abundant members of a diverse bacterial community
Ali, Sajjad [Verfasser], Stefan [Akademischer Betreuer] Vidal, Petr [Akademischer Betreuer] Karlovsky, and Stefan [Akademischer Betreuer] Schütz. "Exploring the interactions of bacterial secondary symbionts (BSS) in wheat aphids, Sitobion avenae F. with parasitoids / Sajjad Ali. Betreuer: Stefan Vidal. Gutachter: Petr Karlovsky ; Stefan Schütz." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2015. http://d-nb.info/1079384561/34.
Full textSouza, Danilo Tosta. "Exploração da diversidade bacteriana de esponjas marinhas por abordagens dependente e independente de cultivo." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11138/tde-06012017-113512/.
Full textThis study describes the diversity of associated bacterial communities to five marine sponges, and the potential of these microorganisms as producers of bioactive substances with fungicidal properties. Sponges live in symbiosis with microorganisms that have a high ecological interest, evolutionary and biotechnological. However, this microbial system remains poorly understood. To fully understand sponge biology, it is necessary to describe the ecological and evolutionary factors that influence the structure and dynamics of their microbial communities. In this work, it is supported the hypothesis that the taxonomic composition and structure of bacterial communities correlate with phylogenetic relatedness of their corresponding hosts. Bacterial communities associated with the sponges Aplysina fulva, Aiolochroia crassa, Chondrosia collectrix, Didiscus oxeata and Scopalina ruetzleri were examined using the Ion Torrent platform for partial sequencing of the 16S rRNA gene. Seawater surrounding specimens were collected for comparisons. The analysis detected a complex and specific microbial system living in sponges, with the operational taxonomic units dominant classified in the phyla: Acidobacteria, Actinobacteria, Chloroflexi, Proteobacteria and Gemmatimonadetes. Despite sympatric occurrence of the specimens, the studied sponges presented different bacterial compositions that differed from those observed in seawater. However, lower dissimilarities in bacterial communities were clearly observed within sponges from the same phylogenetic group (A. fulva and A. crassa). Isolation of bacteria was done from the sponges D. oxeata and S. ruetzleri. Fifty-six strains were isolated and classified into three phyla: Actinobacteria, Proteobacteria and Firmicutes. Phylogenetic analysis indicated five possible novel bacterial species. Based in a polyphasic taxonomy approach, one of the isolates denominated ASPSP 40 was identified as belonging to a novel species of the genus Saccharopolyspora for which the name, Saccharopolyspora spongiae sp. nov. has been proposed. All bacterial isolates were evaluated by their antagonisms against Pythium species. Two of them, Terrabacter sp. ASPSP 140 and Bacillus sp. ASPSP 434 demonstrated strong potential in inhibiting the following species P. aphanidermatum, P. ultimum and P. graminicola. The bioactive secondary metabolites of both, characterized by LC-MS/MS, were identified as a mixture of cyclic dipepitides belonging to the class of diketopiperazine (DKP). This is the first report of fungicidal activity, and thus the detection of DKP of the genus Terrabacter.
LEITE, Jakson. "Simbiose feij?o-caupi e riz?bio: diversidade de bact?rias associadas aos n?dulos." Universidade Federal Rural do Rio de Janeiro, 2015. https://tede.ufrrj.br/jspui/handle/jspui/1992.
Full textMade available in DSpace on 2017-08-23T18:13:31Z (GMT). No. of bitstreams: 1 2015 - Jakson Leite.pdf: 1055808 bytes, checksum: fa105f74410a81a1f30e45ae5e911c9d (MD5) Previous issue date: 2015-02-27
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Cowpea [Vigna unguiculata (L.) Walp] is an important crop in northeastern Brazil with strategic advantages for production in semi-arid region, such its drought tolerance and good performance in low fertility soils. In addition, the nitrogen (N) fixed in symbiosis with rhizobia eliminates the demand for N fertilizers, with economic, social and environmental benefits. Little is known about the genetic diversity of bacteria associated to cowpea nodules in Brazilian semi-arid. The aim of the study was to characterize the bacterial diversity of Brazilian semi-arid soils associated with nodules of different cowpea cultivars by dependent and independent bacterial cultivation strategy. Initially a collection of 86 bacteria cowpea nodules isolated from semiarid soils was genetically characterized by partial 16S rRNA gene sequencing and symbiotic genes nifH and nodC. The sequences were compared with the NCBI database to identify isolates and phylogenetic relationships were built. In another study, we applied the independent cultivation method to evaluate bacterial communities associated with the nodules of two cowpea cultivars (BRS and BRS Acau? Pujante), in Ultisol with no history of cowpea cultivation. Nodules (N) were collected 35 days after germination, and soil samples (BS) from 0-20 cm deeper. DNA was extracted for analysis of bacterial communities with 454 pyrosequencing of the 16S ribosomal gene rRNA. The analysis of the diversity of the bacterial collection of the nodules 54 of the 86 isolates were Bradyrhizobium. Other (32) belong to Rhizobium (13) and Microvirga (1), Alfaproteobact?ria class; Burkholderia (8), and Ralstonia (1), Betaproteobacteria class; Acinetobacter (1), Cronobacter (3), Enterobacter (1), and Pantoea (1), Gamaproteobact?ria; and Leifsonia (3), phylum Actinobacteria. As Bradyrhizobium predominated, analyzes were performed with the almost full 16S rRNA, nifH and nodC and isolates were distributed in 5 lines: 16S rRNA type I (44 isolates), type II (6), Type III (1), Type IV ( 2) and type IV (1). Phylogenetic analysis of the 16S rRNA gene grouped the Type I strain in the large group Bradyrhizobium japonicum and close to the type strain of Bradyrhizobium yuanmingense. The analyses of the nifH and nodC gene separated the isolates in 5 symbiotic lines (I, II, III, IV and IV) and were congruent among them, which supports the theory of monophyletic in origin symbiotic gene Bradyhrizobium. The symbiotic lineages I and II are nearby and correspond to all isolates with 16S rRNA type I, being the dominant group associated with nodules. The partial 16S rRNA gene sequencing of bacterial communities showed high diversity in the three environments (BS, RS and N). The communities associated with the nodes were significantly different (p> 0.01) from the surrounding nodules (LS and RS). Phyla Actinobacteria, Bacteriodetes, Proteobacteria were plentiful for BS and RS. In nodes, the Proteobacteria and Bacteriodetes phyla predominated, Gammaproteobacteria being (58.8%) and Alphaproteobacteria (37.4%) in the phylum Proteobacteria and dominant Flavobacteriia (84.8%) and Sphingobacteriia (10.9%) in the phylum Bacteriodetes. For gender, Chryseobacterium, Entreobacter and Bradyrhizobium dominate in all nodes samples where Chryseobacterium prevailed in BRS Acau? and Enterobacter in BRS Pujante.
O feij?o-caupi [Vigna unguiculata (L.) Walp] ? uma das principais culturas no Nordeste do Brasil com vantagens estrat?gicas para produ??o no semi?rido, como toler?ncia a seca e bom desempenho em solos de baixa fertilidade. Al?m disso, fixa N em simbiose com riz?bios eliminando a demanda de fertilizantes nitrogenados, com benef?cios econ?micos, sociais e ambientais. Pouco se sabe sobre a diversidade gen?tica de bact?rias associadas aos n?dulos de feij?o-caupi no semi?rido. O objetivo do estudo foi caracterizar a diversidade de bact?rias de solos do semi?rido brasileiro associadas aos n?dulos de diferentes cultivares de feij?o-caupi com arbordagem que depende e independe de cultivo das bact?rias. Inicialmente uma cole??o de 86 bact?rias de n?dulos de feij?o-caupi isoladas de solos do semi?rido foi caracterizada geneticamente pelo sequenciamento parcial do gene 16S rRNA e dos genes simbi?ticos nifH e nodC. As sequ?ncias foram comparadas com as do banco de dados do NCBI para identificar os isolados e as rela??es filogen?ticas dos mesmos com as de esp?cies conhecidas. Em outro estudo, aplicou-se o m?todo independente de cultivo para avaliar comunidades de bact?rias associadas aos n?dulos de dois cultivares de feij?o-caupi (BRS Pujante e BRS Acau?), em Argissolo Amarelo sem hist?rico de uso com a lavoura. Os n?dulos (N) foram coletados 35 dias ap?s a germina??o e a amostragem do solo (BS) de 0-20 cm. O DNA das amostras foi extra?do para an?lises das comunidades bacterianas com 454 pirosequenciamento do gene ribossomal 16S rRNA. Na an?lise da diversidade da cole??o de n?dulos 54 dos 86 dos isolados foram de Bradyrhizobium. Os demais (32) pertencem aos g?neros Rhizobium (13) e Microvirga (1), classe Alfaproteobact?ria; Burkholderia (8) e Ralstonia (1), classe Betaproteobact?ria; Acinetobacter (1), Cronobacter (3), Enterobacter (1) e Pantoea (1), Gamaproteobact?ria; e Leifsonia (3), filo Actinobact?ria. Como Bradyrhizobium predominou, foram feitas an?lises com os genes 16S rRNA, nifH e nodC e os isolados distribu?ram-se em 5 linhagens: 16S rRNA tipo I (44 isolados), tipo II (6), tipo III (1), tipo IV (2) e tipo IV (1). A an?lise filogen?tica do gene 16S rRNA agrupou a linhagem tipo I no grande grupo Bradyrhizobium japonicum e pr?ximo da estirpe tipo de Bradyrhizobium yuanmingense. A an?lise dos genes nifH e nodC separou os isolados em 5 linhagens simbi?ticas (I, II, III, IV e IV) e as ?rvores foram congruentes, o que suporta a teoria da origem monofil?tica de genes simbi?ticos em Bradyhrizobium. As linhagens simbi?ticas I e II s?o pr?ximas e correspondem a todos os isolados com 16S rRNA tipo I, sendo o grupo dominante associado aos nodulos. O sequenciamento parcial do gene 16S rRNA das comunidades bacterianas mostrou alta diversidade nos tr?s ambientes (BS, RS e N). As comunidades associadas aos n?dulos foram significativamente diferentes (p> 0,01) das que cercam os n?dulos (LS e RS). Os filos Actinobacteria, Bacteriodetes, Proteobacteria foram abundantes para BS e RS. Em n?dulos, os filos Proteobacteria e Bacteriodetes predominaram, sendo Gammaproteobacteria (58,8%) e Alphaproteobacteria (37,4%) dominantes no filo Proteobacteria e Flavobacteriia (84,8%) e Sphingobacteriia (10,9%) no filo Bacteriodetes. Para g?nero, Chryseobacterium, Entreobacter e Bradyrhizobium dominam em todas as amostras de n?dulos, onde Chryseobacterium predominou em BRS Acau? e Enterobacter em BRS Pujante.
Miquel-Guennoc, Cora. "Étude de l’interaction physique entre le champignon ectomycorhizien Laccaria bicolor S238N et la bactérie auxiliaire de la mycorhization Pseudomonas fluorescens BBc6." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0028/document.
Full textIn soil ecosystems, ectomycorrhizal fungi (ECM) form a widespread symbiosis with roots of trees, contributing to tree growth and health. It has been shown that some bacteria, called mycorrhization helper bacteria (MHB), stimulate mycorrhizal symbiosis. The mechanisms of this helper effect are poorly understood. Previous studies have shown that the MHB Pseudomonas fluorescens BBc6 formed biofilm-like structures around the hyphae of the ECM Laccaria bicolor during their in vitro interaction. In this context, in order to increase knowledge concerning MHB/ECM interactions, the work presented here focuses on the physical interaction between these two organisms. To this purpose, a method of analysis based on confocal microscopy was developed. The results showed that the bacteria formed biofilms preferentially localized on the apical region of the ECM colonies, which could indicate a trophic interaction. Such an interaction has been subsequently confirmed. The results also showed that the physical interaction between L. bicolor and BBc6 is not specific since all thirteen other bacterial strains tested formed biofilms on the hyphae of L. bicolor. On the other hand, BBc6 was unable to form biofilms on some fungi belonging to Ascomycetes, suggesting the existence of inhibition mechanisms. Moreover, the study of the BBc6 biofilm matrix revealed networks of DNA-containing filaments which seem to structure these biofilms and which have also been observed in all the bacterial strains tested. These results reveal a structural role of the DNA molecule, a role that has been rarely reported so far despite its probable high occurrence. Finally, it has been shown that BBc6 mutants having lost their helper effect presented a modified phenotype concerning their biofilm formation on abiotic surface, suggesting a potential link between the helper effect and the biofilms formation
Miloud, Youssra. "Etude du potentiel bénéfique des souches de Rhizobium pour Medicago truncatula : symbiose, solubilisation du phosphate et lutte contre la verticilliose." Thesis, Toulouse, INPT, 2018. http://www.theses.fr/2018INPT0123/document.
Full textBecause of their ability to form a symbiosis with soil bacteria called Rhizobium, legumes play an important role in agriculture. These bacteria fix atmospheric nitrogen; hence their host plants do not need nitrogen fertilizers. In addition, some strains of Rhizobium have the ability to solubilize phosphate, thus providing phosphorus to host plants. An ability to control certain pathogens has also been demonstrated in several studies. The present study evaluates the symbiotic efficiency of Tunisian rhizobia, their ability to solubilize phosphate, and their ability to control Verticillium wilt and other pathogenic fungi in Medicago truncatula. Thirty-six rhizobial isolates were obtained from root nodules of M. truncatula from different parts of Tunisia were used in this work. About 60% of these isolates were able to solubilize phosphate in vitro. In a second step, three phosphate solubilizing rhizobia and one isolate unable to solubilize phosphate in vitro were used for phytotron assays to see the effect of the presence of rhizobia on plant growth parameters in the presence of soluble and insoluble forms of phosphate. The results of the experiment show that A17 plants treated with CaHPO4, tend to produce more nodules and shoot biomass than F83005.5 and that the phosphate form used, soluble or non-soluble, affects parameters studied. Inoculation of four M. truncatula lines with 16 previously selected rhizobial isolates showed significant interaction between isolates and lines for symbiotic abilities as visualised by nodule formation. All rhizobial isolates tested increased above-ground biomass, reduced root biomass, and increased nitrogen content with strains effects of plant genotype and bacterial isolate. Finallly, these isolates were tested for their ability to protect M. truncatula plants against Verticillium wilt, and to inhibit the growth of pathogenic fungi such as Verticillium and Fusarium in vitro. However, no isolate could be identified as effective for biological control. The results of this study suggest that selected rhizobial isolates could be used as biofertilizers in poor soils to reduce the use of nitrogen and phosphorus fertilizers but not to control Verticillium wilt
Irshad, Usman. "Relations trophiques dans la rhizosphère : effet des interactions entre champignon ectomycorhizien, bactéries et nématodes bactérivores sur le prélèvement minéral du Pin maritime (Pinus pinaster)." Thesis, Montpellier, SupAgro, 2011. http://www.theses.fr/2011NSAM0029/document.
Full textSoil microorganisms act as a sink and a source of available N and P bymediating key processes in the biogeochemical N and P cycling. The microbial loop, basedupon the grazing of bacteria by predators such as bacterial-feeding nematodes, is thoughtto play a major role in the mineralization of nutrients such as nitrogen (N) and phosphorus(P) in terrestrial ecosystems. However, little is known about the impact of grazing bynematodes on mineral nutrition of ectomycorrhizal woody plants. Different studies wereundertaken to quantify the role of nematode grazing on bacteria on the root growth andarchitecture, mineral nutrition (N and P) of a woody species, Pinus pinaster, whether ornot associated with the ectomycorrhizal basidiomycete Hebeloma cylindrosporum. Plantswere grown in a sterile simplified experimental system, whether inoculated or not withBacillus subtilis and bacterial-feeding nematodes (belonging to Rhabditidae orCephalobidae families) that were isolated from ectomycorrhizae and from soil of a P.pinaster plantation. The effect of nematode grazing on plant growth and the fate ofbacterial 15N towards plant shoots was strongly dependent upon medium P availability. Inaddition, nematode grazing was required to enable the plant to access P from phytate, awell-known poorly available P source to plants but that was used by bacterial populationsof B. subtilis due to its ability to release phytase in the medium. These results open analternative route to increase the use of phytate for plant P nutrition
Sudakaran, Sailendharan [Verfasser], Rolf G. [Akademischer Betreuer] Beutel, Martin [Akademischer Betreuer] Kaltenpoth, and Andreas [Akademischer Betreuer] Brune. "Evolution of mutualistic microbiome in firebugs and cotton stainers (Hemiptera; Pyrrhocoridae) : characterizing the role of bacterial symbionts in diversification and niche expansion of Pyrrhocoridae / Sailendharan Sudakaran. Gutachter: Rolf Georg Beutel ; Martin Kaltenpoth ; Andreas Brune." Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2015. http://d-nb.info/1079217819/34.
Full textSudakaran, Sailendharan Verfasser], Rolf G. [Akademischer Betreuer] [Beutel, Martin [Akademischer Betreuer] Kaltenpoth, and Andreas [Akademischer Betreuer] Brune. "Evolution of mutualistic microbiome in firebugs and cotton stainers (Hemiptera; Pyrrhocoridae) : characterizing the role of bacterial symbionts in diversification and niche expansion of Pyrrhocoridae / Sailendharan Sudakaran. Gutachter: Rolf Georg Beutel ; Martin Kaltenpoth ; Andreas Brune." Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2015. http://d-nb.info/1079217819/34.
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