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 9 of 9 for “"soil-borne pathogen"”.
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Dissection of Innate Immunity in Tomato and Tolerance to Bacterial Wilt in Solanaceae species
… cells. However, plants can still recognize pathogens and defend themselves. They do that by recognizing microbial-associated molecular patterns (MAMPs) and secreted pathogen proteins, called effectors. MAMP-triggered immunity (MTI) relies on recognition of MAMPs by leucine-rich repeats …
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Influence of site and soil type on the distribution of anthrax infectious sites and the contribution of anthrax to elephant mortality in Ethosha National park, Namibia
Bacillus anthracis, a soil-borne pathogen, causes the deadly zoonotic disease anthrax. Anthrax outbreaks occur frequently in Etosha National Park (ENP). ENP has nine major soil types and a distinct rainfall gradient decreasing from east to west. The sporulation success of B. anthracis is believed …
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IDENTIFICATIN AND CHARACTERIZATION OF PATHOGENICITY GENES IN FUSARIUM VIRGULIFORME, THE CAUSAL AGENET OF SUDDEN DEATH SYNDROME (SDS) IN SOYBEAN
<italic>Fusarium virguliforme</italic> is a soil-borne pathogen that causes sudden death syndrome (SDS) disease in soybean. SDS is one of the most significant diseases of soybean in the United States. Fungal infection results in root and crown rot as well as SDS typical foliar symptoms including …
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Soil Microbial Community Distributions And Disease Suppressiveness In The Coastal Plain Of Georgia
<p>This study compared the soil microbial communities of three vegetation types in the coastal plain of Georgia: 1. crop land actively in use for agricultural production, 2. transitional grassland in early stages of secondary succession, and 3. pristine unmanaged forest land. Microbial species …
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Using Modelling to Optimise the Use of Biological Control Agents Against Soil-Borne Plant Pathogens
… agents as a control strategy against plant pathogens. However, significant variability in their success at pathogen suppression across field trials has resulted in them often not being seen as commercially viable. This thesis uses mathematical modelling to explore the interactions between a …
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Quantitative Investigations of Infection and Colonization of Peanut Roots by Cylindrocladium crotalariae
… to estimate the inoculum potential for this soil-borne pathogen under soil-temperature tank conditions favorable for CBR development. Using cultural plating methods, numerous Q. crotalariae infections (1 to > 1,000 per plant) were observed on asymptomatic root systems of peanut plants, …
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Phaeomoniella chlamydospora: potential inoculum sources in the grapevine propagation process
… chlamydospora is a recently described fungal pathogen that infects grapevines causing Petri disease, which is observed externally as a general decline. The objective of this research programme was to identify potential sources of inoculum in the grapevine propagation process (including …
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Ecological assessments of Pseudomonas communities in pastoral soils: implications for disease suppression and sustainable production in agricultural grasslands
… services such as ensuring water quality and soil carbon storage. An increasing proportion of grasslands are being used to support grazing livestock, with agricultural grasslands covering over 25% of the Earth’s ice-free land surface. Despite the increasing economic value of pasture-derived …
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Biochemical, Molecular and Functional Analysis of Volatile Terpene Formation in Arabidopsis Roots
… in Arabidopsis roots in interaction with the soil-borne oomycete, Pythium irregulare. Infection of roots with P. irregulare causes emission of the C11-homoterpene (or better called C4-norterpene) 4,8-dimethylnona-1,3,7-triene (DMNT), which is a common volatile induced by biotic stress in …