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 30 for “"Oomycetes"”.
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Genomic Evolution in the Oomycetes
… devastating pathogens of plants and animals. Oomycetes secrete large arsenals of effector proteins that perform a wide range of functions, including sequestering nutrients from hosts and the environment, degrading host cells to facilitate colonisation, and modulating host immune responses. …
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NOVEL PERSPECTIVES IN THE CONTROL OF PLANT PATHOGENIC OOMYCETES
Plant pathogenic oomycetes pose significant threats to the productivity, quality and sustainability of agricultural production. Traditionally, the control of oomycete-borne diseases is achieved by means of chemical control based on fungicides. However, the negative impact of these molecules on the …
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A tale of two clades: genome evolution of oomycetes and fungi.
… from two groups of filamentous eukaryotes; the oomycetes and the fungi. Although similar in morphology and ecological niche, the two groups are only very-distantly related in terms of evolutionary history. The oomycetes are underresearched in evolutionary science, despite their historical and …
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Distribution and Frequency of Aquatic Oomycetes Throughout Marin County in Relation to Physical Chemical Water Parameters
<p>Oomycetes, also known as water molds, belong to the kingdom <em>Stramenopila </em>and<em> </em>are a well-known group of plant pathogens and saprophytes. Important species include <em>Phytophthora ramorum </em>(causal agent of sudden oak death), <em>Pythium aphanidermatum</em> (root rot), and …
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Nuclear Localization of Proteins and Genome Editing in the Oomycete Phytophthora sojae
Oomycetes are fungi-like eukaryotic microorganisms, which are actually phylogenetic relatives of diatoms and brown algae, within the kingdom Stramenopila. Many oomycete species, mainly in the genera Phytophthora, Pythium and downy mildews, are devastating plant pathogens that cause …
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Characterization of oomycete species causing soybean diseases in Illinois and management applications
… stem rot (PRR) and seedling diseases caused by oomycetes, are two of the most important yield limitations for soybean production in the US Midwest. Several species of Phytophthora and Pythium cause PRR and seedlings diseases, respectively. PRR is managed using cultivars with single resistance …
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Molecular systematics of Plasmodiophora brassicae
… parasites of various higher plants, algae and Oomycetes have been classified in various ways as both protists and fungi. It is not known which, if any, of these classification schemes reflects the actual evolutionary relationships of this group.
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Identification and characterisation of phytophthora capsici CRN effector proteins and their targets in planta
… have occurred in the peronosporales lineage of oomycetes (to which P. capsici belongs), though CRNs can be identified in all oomycetes sequenced to date.<br/>We show that CRN effectors are upregulated during infection and as expected by their diverse sequences, appear to have different dynamics. …
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CHARACTERIZATION OF BIOACTIVE PEPTIDES IDENTIFIED FROM GENETICALLY ENCODED LIBRARIES.
… protect crops from disruptive diseases caused by oomycetes. With this aim, a yeast two-hybrid suitable library was constructed to identify cyclic peptides (CPs), which provide enhanced levels of in vivo stability and affinity for the target protein respect to linear counterparts. The produced …
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Evaluation of Pythium root rot and damping off resistance in the ancestral lines of North American soybean cultivars and chemical control of the active ingredient ethaboxam in seed treatments
… been on the market for over 30 years to control oomycetes, especially Pythium spp. and Phytophthora sojae. A new active ingredient, ethaboxam, has recently come to the fungicide seed market as a new management tool against oomycetes. In order to understand the effects of the new active …
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New Tools to Understand Mechanisms of Nutrient Transfer from Plants to Biotrophic Pathogens
… (Hpa), provides a model for understanding how oomycetes colonize plants. Hpa is a model organism for many highly destructive oomycete pathogens and transcriptomics of this interaction have been well-documented. However, the material in these studies has been derived from infected leaves that …
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Identification and functional characterization of RXLR effector proteins that are conserved between downy mildew pathogens and Phytophthora species
… candidate effectors is conserved in related oomycetes. Here, we describe a comparative functional characterization of the Hpa RXLR effector HaRxL96 and a homologous gene, PsAvh163, from the soybean pathogen Phytophthora sojae. HaRxL96 and PsAvh163 are induced during early stages of infection …
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Unveiling and exploiting <i>Phytophthora capsici</i> effectors and their host targets, with an emphasis on CRN effector proteins
… effectors were first described in oomycetes by their capacity to induce host cell death. Nevertheless, despite recent efforts aiming to elucidate CRN virulence functions, the virulence relevance of CRN mediated cell death remains unknown. In this thesis, by performing a PCR based …
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Evaluation of Lysobacter enzymogenes C3 for control of soybean fungal diseases
… the following soybean-pathogenic fungi and oomycetes: Cercospora sojina, Fusarium virguliforme, Macrophomina phaseolina, Phytophthora sojae, Pythium sylvaticum, Rhizoctonia solani, Septoria glycines, and Sclerotinia sclerotiorum. Our experiments confirmed previous reports that antagonism …
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Approaches towards disease resistance to filamentous pathogens
… effect of capsidiol towards these two oomycetes was determined and quantified. I also monitored intraspecific variation among various P. infestans isolates in their sensitivity towards capsidiol. Plant defence machinery also involves intracellular immune receptors of the …
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Investigation of the molecular basis of PAMP-induced resistance
… Arabidopsis employs to restrict fungi and oomycetes invasion. Results showed that these compounds are dispensable for antibacterial resistance triggered by the bacterial PAMP flagellin (flg22). In addition, as an unbiased approach, I performed a novel genetic screen aimed at identifying …
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STRUCTURE-FUNCTION STUDIES OF TRANSLOCATED EFFECTORS FROM THE LATE BLIGHT PATHOGEN
… defence responses. Amongst plant pathogens, oomycetes of the genus Phytophthora have arguably caused almost unrivalled levels of human suffering and represent significant threats to global food security. The late blight pathogen, Phytophthora infestans, is the most devastating pathogen of …
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Molecular Analysis of Oomycete Pathogens to Identify and Translate Novel Resistance Mechanisms to Crops
Disease outbreaks caused by oomycetes can be catastrophic. The first part of this dissertation describes development of a system to identify potential new and durable resistance (R) genes against P. sojae in soybean germplasm. We developed a system to screen soybean germplasm for genes that …
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Structural basis for interactions of the Phytophthora sojae RxLR effector Avh5 with phosphatidylinositol 3-phosphate and for host cell entry
Oomycetes, such as Phytophthora sojae, are plant pathogens that employ protein effectors that enter host cells to facilitate infection. Plants may overcome infection by recognizing pathogen effectors via intracellular receptors (R proteins) that form part of their defense system. Entry of some …
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