Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 50 for “"Symbioses"”.
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Engineering plant-microbe communication for synthetic symbioses
Current agricultural practices will not be able to keep pace with a growing population in a changing climate. A better understanding and increased reliance on the symbiotic relationships between plants and their resident microbiome will be crucial in addressing this challenge. In addition, these …
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Liverwort-Fungal Associations: Novel Symbioses In Polar Regions?
Symbioses between plants and fungi are ubiquitous in terrestrial ecosystems, in which they play key roles in plant nutrient acquisition and the cycling of elements. The plant host provides carbon fixed in photosynthesis to the fungi, which in return provide the host with limiting nutrients such as …
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Coevolution and consequences of symbioses between aphids and maternally transmitted bacteria
… biology or the coevolutionary histories of these symbioses. I have addressed these mysteries in this dissertation, through use of molecular and experimental analyses. My findings reveal that secondary symbionts are diverse and infect members of numerous aphid and insect taxa. Though they are …
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The nutritional role of endosymbiotic bacteria in animal-bacteria symbioses : Solemya velum, a case study
… bacteria and the host in animal-bacteria symbioses were investigated using the endosymbiont-containing protobranch clam, Solemya velum, as a general model. C, N, and S stable isotope compositions were investigated in tissues of S. velum; C and N isotope values were also examined in an …
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OF GERMS AND BUGS: ECOLOGICAL AND GENETIC APPROACHES TO DISENTANGLING SYMBIOSES IN A HONEY BEE PARASITE SYSTEM
Complex communities of microorganisms reside within and impact the health of their hosts along a dynamic continuum of interactions that fall under the blanket term symbiosis. Host-microbe associations are a fundamental feature of animal life, where they shape digestion, development, immunity, …
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Characterisation and expression of Receptor-like Cytoplasmic Kinases in Medicago truncatula during Rhizobial and Arbuscular Mycorrhizal symbioses
… during rhizobial and arbuscular mycorrhizal symbioses.
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Host specificity in the Rhizobium symbioses of two Aspalathus species and an invasive alien legume, Acacia saligna
The symbiotic specificity of Aspalathus capensis and A. carnosa in relation to their geographical distribution, was investigated by growing plants in soil and in tubes containing soil solutions plus nitrogen-free nutrient solutions. Soila were collected from three sites within their distribution …
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In search of symbioses : an assessment of the relationships between two industrial estates and their adjacent communities in Trinidad, West Indies
… in Trinidad to determine wherein lie the symbioses between industry and community in each case; under what conditions are these links created; and finally, what conditions can lead to their propagation of these established connections.
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Control of arbuscular mycorrhizal colonisation : studies of a mycorrhiza-defective tomato mutant / Lingling Gao.
… defence responses in the establishment of AM symbioses.
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The chemical ecology of Lingulodinium polyedra and its microbiome
… that could be critical to L. polyedra-bacteria symbioses and that are connected to pyridoxine synthesis. Overall, this research has important implications for HAB management, biochemistry of vitamins in the ocean, and algae-bacteria symbioses.
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Characterisation of CCaMK in symbiosis signalling
Many plants form important and beneficial symbioses with microbes including arbuscular mycorrhization and the legume-rhizobial interaction. The establishment of both these symbioses involves common genes which encode the Sym pathway proteins, of which calcium- and calmodulin-dependent protein …
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In Hot Water: Thermal Acclimation is Insufficient to Save Corals in the Anthropocene
… corals are animal partners in exquisite symbioses with a suite of algal, microbial, fungal and viral associates comprising miniature ecosystems collectively referred to as a holobiont. In recent decades, ocean warming has jeopardized the delicate balance of the very symbioses that have …
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Analysis of gene expression, regulation and function of three symbiotic ABC subfamily-B transporters in Medicago truncatula
… Establishment of functional beneficial symbioses requires successful microbial infection. An initial exchange of signalling molecules between the host and the microbe sets off extensive transcriptional reprogramming of the host developmental programme to accommodate the incoming microbe. …
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Health and human nature: A naturalist's account of health and normality
… among ecologists of the classification of symbioses.
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A comprehensive microbiome analysis of wheat and its wild relatives
… in their native environment by establishing symbioses with a consortium of beneficial microbes (Iannucci et al., 2017). However, these microbial communities are not well understood. The goal of this study is to better understand the core community of microbes in wild wheat relatives and how …
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Abiotic and Biotic Factors Shaping Plant-Microbe Interactions
Symbioses between plants and soil microbes can shape plant traits and performance, population dynamics, community composition, and ecosystem function. However, the context-dependency of plant-microbe interactions remains an underexplored frontier of scientific understanding. Given that the biotic …
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The effects of different concentrations of phosphite on ectomycorrhiza formation by Pisolithus tinctorius in Castanea dentata
… ability to form ectomycorrhizas, the mutualistic symbioses between tree roots and certain soil fungi, and the phosphites themselves may be phytotoxic at high doses. Container-grown chestnut seedlings were treated with six phosphite solutions ranging from 0.0g/l to 12g/l both with and without a …
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Oxygen control of nitrogen fixation in Frankia and Coriaria arborea
… Frankia and Frankia - actinorhizal plant symbioses. Daily addition of fresh medium at a low dilution rate (D=0.125 day⁻¹) allowed Frankia to be maintained in continuous culture with a stable rate of growth and nitrogenase activity for periods of more than 30 days. Use of continuous …
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