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 17 of 17 for “"Phyllosphere"”.
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The Effect of Environmental Perturbations on the Plant Phyllosphere Microbiome
… across the habitat in time or space. The phyllosphere is the aboveground surface of plants on which microbial communities, composed primarily of Bacteria, but also including Archaea and microbial eukaryotes, exist and is characterized by stochastic immigration balanced with strong …
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Host Specificity, Negative Feedbacks, and Pathogen Defense in the Plant Phyllosphere Microbiome
… with aboveground tissues, termed “plant-phyllosphere feedback”. In this work, I found that all four species tested experienced strong negative plant-phyllosphere feedback suggesting that phyllosphere, like rhizosphere (belowground), microbiota can potentially mediate plant species …
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The effect of Septoria brown spot on soybean yield and phyllosphere microbiome
… the effect of the fungicide applications on the phyllosphere fungal community needs further understanding. In this study, my research goals were to (i) characterize the development of SBS and its relationship with yield reduction, (ii) develop molecular markers for early identification and …
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Exploring Interactions of Phyllosphere Epiphytes with Plant Pathogenic Bacteria Pseudomonas and Xanthomonas on Tomato
… been recognized as common residents of the <em>phyllosphere</em> for many host plants, however their role in disease control needs to be further investigated. The purpose of this study was to conduct experiments investigating the effectiveness of <em>phyllosphere</em> <em>Methylobacterium</em> …
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Microbial Ecology and Horticultural Sustainability of Organically and Conventionally Managed Apples
… applications on the microbial ecology of phyllosphere and soil microflora. An important objective was to establish if organic or conventional selection pressures contribute to an increased presence of enteric pathogens in phyllosphere microflora. The horticultural and economic …
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The Comparative Risk of Antimicrobial Resistance Transfer from Pig, Poultry and Bovine Manure to Grassland
… and is a vital source of food for livestock. The phyllosphere of plants is an under-researched area regarding the impact of agricultural management practices. Therefore, the grass phyllosphere is a possible source of AMR transmission to livestock, which may enter the food chain. Despite the …
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Identification, Characterization, and Use of Precipitation-borne and Plant-associated Bacteria
… of the plant leaf microbiome, also called the phyllosphere microbiome, are still under debate. Here, I hypothesized that precipitation is a so far neglected source of the phyllosphere microbiome. Using 16S rRNA amplicon and metagenomic sequencing, I identified the genera Massilia, Sphingomonas, …
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Metabolic control of the ethylmalonyl-CoA pathway in Methylobacterium extorquens AM1
… in nature and is often associated with the plant phyllosphere, a heterogeneous environment with consistently changing substrate availability. During growth on one-carbon substrates, such as the renewable feedstock methanol, M. extorquens AM1 utilizes the ethylmalonyl-CoA pathway that involves …
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Intercellular production of Hydrogen peroxide in Solanum lycopersicum: an immune response to Salmonella infection
… may proliferate in both the rhizosphere and phyllosphere of the tomato plant Solanum lycopersiscum. In tomatoes, Salmonella has varying levels of proliferation success depending on the variety of tomato in question. Previous studies had shown that tomatoes of the cherry variety were …
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Tracing the New Carbon Cycle From Plant Inputs to Microbial Outputs Across an Arctic Permafrost Thaw Gradient
… composition plays an important role in shaping phyllosphere microbial communities but environmental conditions are more important to shaping rhizosphere communities. Plant communities were especially important in shaping methanogenic and methanotrophic communities, which may have important …
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Molecular Characterization of Spinach (Spinacia Oleracea) Microbial Community Structure and its Interaction With Escherichia coli O157:H7 in Modified Atmosphere Conditions
… of enteric pathogens like E. coli O157:H7 on the phyllosphere.
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Interplay between selenium hyperaccumulator plants and their microbiome
… occur on the plant root (rhizosphere) and shoot (phyllosphere) or inside plants (endosphere). Many of these microbes benefit their host by promoting growth, helping acquire nutrients or by alleviating biotic or abiotic stress. In addition to its intellectual merit, better knowledge of …
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Investigating behaviors of zoonotic and human pathogens on plants
… well as how these organisms persist within the phyllosphere and rhizosphere of these plants is an extremely complex issue. In addition, the CDC estimates that unspecified agents are responsible for 38.4 million out of the 48 million (80 %) cases of foodborne illnesses. It is hypothesized that …
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Tea (Camellia sinensis (L.) O. Kuntze) plant productivity and protection with microbial stimulants : A thesis submitted in partial fulfilment of the requirements for the Degree of Doctor of Philosophy at Lincoln University
… endophytes were identified from the tea phyllosphere in Sri Lanka. More than 50% of them exhibited biocontrol potential against the economically important tea pathogens in-vitro while Trichoderma harzianum provided the best inhibition. Seven indigenous fungal and four bacterial genera …
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Respuestas fúngicas a señales ambientales: Funciones de las proteínas CarO, OpsA, CutA y AcyA en Fusarium fujikuroi
… fungi, where green light dominates the phyllosphere. Our data provide the first reliable clue on a possible biological function for a fungal rhodopsin.
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The wheat seed phytomicrobiome as a potential source of resistance to the fungal disease, Fusarium head blight
Plant-associated microbes (collectively the microbiome) are important contributors to plant health. They are known to play roles in increasing yield via improving stress tolerance, promoting growth, and suppressing the activity of plant pathogens. We investigated the wheat seed-head microbiome …
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The role of cross-kingdom biofilms in the epiphytic growth of Zymoseptoria tritici
Septoria leaf blotch (STB), caused by the fungal pathogen Zymoseptoria tritici, is one of the biggest threats to wheat production globally. Recently, it has been shown that this pathogen can survive for extended periods and form biofilms on the leaf surface prior to infection. However, it is …