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 33 for “"plant defence"”.
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An investigation into the role of the ubiquitin-proteasome system in plant defence
… pathway appears to be more diversified in plants compared to the other organisms. In plants, the ubiquitin-26S proteasome pathway appears to be particularly involved in regulating plant growth, development and defence signalling. This project is concerned with establishing potential …
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6-deoxy-6-amino chitosan: A plant defence priming biopolymer that enhances resistance against Botrytis cinerea in tomato and Fusarium verticillioides in maize
… cinerea growth and sporulation. Additionally, in planta studies were conducted to phenotype and quantify temporal stress responses using both qualitative and quantitative chlorophyll fluorescence imaging as well as DAB assays combined with microscopy. Despite batch-to-batch variations, …
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Control of arbuscular mycorrhizal colonisation : studies of a mycorrhiza-defective tomato mutant / Lingling Gao.
… with respect to fungal colonisation patterns and plant defence reactions during interactions with different species of arbuscular mycorrhizal (AM) fungi, root fungal pathogen Rhizoctonia solani and binucleate Rhizoctonia (a fungal parasite that colonises roots without causing disease). The results …
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Influence of salicylate and abscisic acid on the resisitance of tomato to biotrophic and necrotrophic pathogens
Plants protect themselves against pathogenes by putting up physical and biochemical barriers through processes involving hormone-mediated signalling. The plant defence hormone, Salicylic acid (SA), was tested for its role in the response of tomato and tobacco to a necrotroph, Botrytis cinerea and a …
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Dissecting the jasmonate singalling pathway in Arabidopsis thaliana
… releasing toxic by-products which play a role in plant defence against insects and pathogens.
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Approaches towards disease resistance to filamentous pathogens
In the co-evolutionary arms race between plants and pathogens, plants have developed a multifaceted armory consisting of diverse defence responses, such as the production of antimicrobial compounds and the activation of immunity via specific receptors. This work examines the use of the phytoalexin …
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The exploration of potato-associated bacteria in the Central Andean Highlands and their application in integrated crop management systems
… the influence of microbial isolates on plant defence responses was determined. Volatile organic compounds of bacterial isolates were identified using GC/MS. RT-qPCR analysis revealed the significant expression of Ethylene Response Factor 3 (ERF3) and the results of this study suggest …
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An investigation into the role of ubiquitination in plant immunity
Plants have developed elaborate defence mechanisms to protect themselves against pathogens. Recently, the ubiquitin-proteasome pathway has been proven to play important roles in regulating plant disease resistance. Previously, the tobacco (Nicotiana tabacum) ACRE276 and its Arabidopsis homolog …
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Kartenorientierte Isolierung des Rar1 Locus
… the molecular mechanisms of R-gene mediated plant defence Rar1 was isolated by map-based cloning. The Rar1-cosegregating marker MWG87 was employed for the identification of five barley YAC clones. Genetic mapping of the YACends showed that the corresponding clones cover the Rar1-containing …
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An investigation into the role of cytosolic free Ca2+ in Salicylic acid mediation of disease resistance in Arabidopsis
… requirement for the activation of numerous plant defence mechansms. Cytosolic free Ca2+ ([Ca2+]c) is a ubiquitous signalling molecule involved in a host of cellular processes. Using transgenic Arabidopsis thaliana seedlings expressing the Ca2+-sensitive photoprotein aequorin, we previously …
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Charakterisierung des GR1-Gens aus Arabidopsis thaliana (L.) Heynh. im Hinblick auf die rassenspezifische Resistenz des Ökotypen Wassilewskija gegenüber dem Peronospora parasitica-Isolat WELA
… to the T-DNA insertion in GR1. Therefore, gr1 plants were retransformed using different genomic constructs. Independent transformant lines showed local resistance responses after inoculation with WELA and these were not apparent in control plants. However, a completely resistant transformant …
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Investigating the regulation of plant immunity by the N-degron pathway
Crop losses arising from plant diseases present a major obstacle for efforts to meet the food demands of a growing global population, and these impacts may be exacerbated by unprecedented rates of climate change. The Ubiquitin Proteasome System (UPS) contributes to the regulation of plant immunity …
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Assessment of endosomes as sites of signal transduction in plants during bacterial attack
… to cellular function and particularly to plant defence. Environmental signals are perceived and immediate signalling responses are triggered from the PM, but how information is effectively transduced to generate the appropriate responses is less well understood. Furthermore the role of …
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Responses of wheat to infection by Mycosphaerella graminicola
… with virulent M. graminicola. Expression of 11 plant defence- and senescence-related genes was tested in eight variety/isolate combinations which involved Stb6 and Stb15, the two most common resistance genes in European wheat. Inoculation with M. graminicola caused a large effect on plant gene …
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Role of xanthophyll and water-water cycles in the protection of photosynthetic apparatus in Arbutus unedo and Arabidopsis thaliana
… and VDE mRNA amount in not-irrigated plants. Unexpectedly, gene expression is higher during the night when xanthophylls are mostly epoxidated and VDE activity is supposed to be very low than during the day. The importance of the water-water cycle in protecting the chloroplasts from …
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The Molecular Consequences of CK2-mediated Phosphorylation of the TGA2 Transcription Factor within Systemic Acquired Resistance of Arabidopsis thaliana
During infection, the model plant Arabidopsis thaliana is capable of activating long lasting defence responses both in tissue directly affected by the pathogen and in more distal tissue. Systemic acquired resistance (SAR) is a type of systemic defence response deployed against biotrophic pathogens …
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Untersuchungen zu Monolignolbiosynthese-Mutanten und den CCR Genen in Arabidopsis thaliana
Producing plants with reduced or suitably altered lignin are desirable industrial goals allow reduced energy input in paper mills and to obtain biomass that can be more efficiently fermented. Lignin is a water-insoluble complex phenolic polymer made up of condensed phenylpropanoid subunits. The …
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Iron and reactive oxygen in wheat-pathogen interactions
… of various proteins and pigments for both plants and pathogenic fungi. However, redox cycling between the ferric and ferrous forms of iron can also catalyse the production of dangerous free radicals and iron homeostasis is therefore tightly regulated. During pathogen attack, plants quickly …
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Investigating the effect of mutations in lipopolysaccharides (LPS) (O-antigen and Core region) of Salmonella Typhimurium on the colonisation of “microgreens”
… for bacterial proliferation or suppression of plant immune responses. In contrast, the SGSC230 mutant strain, which has mutations in the LPS core region, showed significantly reduced attachment after multiple washes, emphasising the importance of the LPS core in bacterial adhesion and survival …
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Common Accommodation Mechanisms for Mutualistic and Detrimental Fungi in Oryza sativa (Rice) Roots
… possibly as a disguise to bypass the plant defence machinery whilst entering the host. Identifying shared plant genes and development programmes utilised by M. oryzae and R. irregularis during rice root invasion will provide a better understanding of how the host plant responds to and …
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