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 15 of 15 for “"phytopathogen"”.
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The in planta role of the global regulator Lrp in the bacterial phytopathogen Pantoea stewartii subsp. stewartii
Pantoea stewartii subsp. stewartii is a bacterial phytopathogen that causes the disease Stewart's wilt in corn. The insect vector Chaetocnema pulicaria, the corn flea beetle, transmits P. stewartii into corn plants through wounds in the leaves. The bacteria can then move to the xylem of the plant …
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Identification of novel regulators of the necrosis-inducing protein (Nip) and carbapenem antibiotic production in the phytopathogen Pectobacterium
Pectobacterium is a Gram-negative phytopathogen that causes soft rot and blackleg disease of potatoes. It produces plant cell wall degrading enzymes (PCWDEs) and is capable of swimming and swarming motility. Some strains also produce a simple β-lactam carbapenem antibiotic, …
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Cyclic di-GMP signalling and the regulation of virulence, biofilm formation and epiphytic fitness in the phytopathogen <i>Xanthomonas campestris</i>
The full virulence of Xan<i>thomonas campestris</i> pathovar c<i>ampestris</i> (<i>Xcc</i>) for its host plant is dependent on many different factors (Chan and Goodwin, 1999). A pivotal role is played by the second messenger cyclic di-GMP. C-di-GMP is essential for successful infection of the host …
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Cause and Impacts of the Early Season Collapse of Lilium grayi (Gray’s lily), on Roan Mountain, TN/NC
… of the <em>Lilium</em> spp. host-specific fungal phytopathogen, <em>Pseudocercosporella inconspicua</em> (G. Winter) U. Braun were associated with 19/20 symptomatic and 0/30 asymptomatic plants. Strength of the association between pathogen and disease and the replication of disease symptoms in 4/4 …
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Investigation of Pantoea stewartii Quorum-Sensing Controlled Regulators and Genes Important for Infection of Corn
… lead to informed intervention strategies. This phytopathogen uses quorum sensing (QS) to coordinate cell density-dependent gene expression and successfully colonize corn leading to wilt disease. Prior to the research presented in this dissertation, the QS master regulator EsaR was shown to …
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The Potential Interaction of Salmonella enterica and Ralstonia solanacearum in Tomato Plants
… plant disease, bacterial wilt, caused by the phytopathogen Ralstonia solanacearum threatens the sustainability of ESV tomato production. Bacterial wilt is present in most ESV tomato fields and causes devastating yield losses each year. Due to the ESV\'s endemic population of R. solanacearum …
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Analysis of the Quorum Sensing Regulons of Vibrio parahaemolyticus BB22 and Pantoea stewartii subspecies stewartii
… wounds. P. stewartii, on the other hand, is a phytopathogen that causes Stewart's wilt in maize. It is found in soil or the mid-gut of the corn flea beetle, its insect vector. Both V. parahaemolyticus and P. stewartii utilize quorum sensing to control their pathogenicity. Quorum sensing enables …
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Callus Culture as a Prospective Biosensor: Examining Fusarium graminearum Infection and Exploring the Use of RUBY as a Pathogen-Inducible Reporter
… confirm the efficacy of using reporter callus in phytopathogen detection. The work presented here can inform the design of novel phytosensors, hopefully contributing to the development of portable, on-site biosensor technology that can immediately alert the presence of agronomically important …
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In planta studies of the corn pathogen Pantoea stewartii subsp. stewartii and applications of a corn-based industrial byproduct
… stewartii subsp. stewartii, is a bacterial phytopathogen that is vectored into the plant by the corn flea beetle, Chaetocnema pulicaria. After entering the apoplast of the leaf, the bacteria cause water soaking symptoms before traveling to the plant xylem to form a dense biofilm, thereby …
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Investigations on the antifungal and cancer modulating properties of extracts from selected species of Tulbaghia
… verticil/ioides (Sacc) Nirenberg a common phytopathogen of maize and maize-based products produces fumonisin B (FB) mycotoxins that have been related to several diseases such as equine leukoencephalomalacia (ELEM), porcine pulmonary edema (PPE), liver toxicity in several animals and …
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Nano-indentation and Nano-scale imaging using atomic force microscopy: from single cell to single molecule
… which is secreted by the gram- negative phytopathogen the Xanthomonas campestrisis (Xcc). Given its distinctive rheological properties such as the capability to form a highly viscous solution at low shear forces, xanthan was used in various applications such as the foods industry, …
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Characterization of Novel Type VI Effectors of Acidovorax citrulli and Their Applicability to Biological Control of Plant Diseases
… focus on the characterization of the T6SS of a phytopathogen, Acidovorax citrulli (strain AAC00-1), and the secreted T6 effectors, and will also discuss the possible application of AAC00-1 as a BCA. The seed-borne, gram-negative A. citrulli is able to cause bacterial fruit blotch (BFB) disease …
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Environmental bacteriophages infecting Dickeya and Serratia species: receptors and diversity
Phytopathogenic Dickeya species inflict large economic losses on a variety of crops. A lack of effective chemical control methods has generated interest in the use of bacteriophages (phages) as a novel tool for biocontrol. In the last decade, six phages have been isolated in Belgium and Poland …
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Investigation of the quorum-sensing regulon in the corn pathogen Pantoea stewartii
Pantoea stewartii subsp. stewartii is a bacterium that causes Stewart’s wilt disease in corn plants. The bacteria are transmitted to the plants via an insect vector, the corn flea beetle Chaetocnema pulicaria. Once in the plant, the bacteria migrate to the xylem and grow to high cell densities, …
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Role of the Leucine-responsive Regulatory Protein during growth of the bacterial corn pathogen Pantoea stewartii subspecies stewartii in the xylem environment
In the United States corn is one of the leading agricultural products and one of the top exports. The majority of U.S corn is grown in the Midwestern region of the U.S. known as the Corn Belt where the bacterial disease Stewart's Wilt reduces crop yield. Pantoea stewartii subsp. stewartii (Pss) is …