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 31 for “"plant parasitic"”.
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Developing a genetic toolkit for plant-parasitic nematodes
… and feed on bacteria, fungi, and protozoa. Plant-parasitic lifestyles are relatively rare in terms of numbers, however, through their parasitism these nematodes have a substantial impact on agriculture. They are estimated to account for over 10% of the annual life-sustaining crop losses, …
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Investigating the role of neuropeptides in plant parasitic nematodes
Plant parasitic nematodes (PPNs) devastate agriculture on a global scale causing severe annual economic losses. Withdrawal of the chemical nematicides used to control PPNs, due to their harmful environmental effects, has led to a short fall in<br/>our ability to manage these pests. This thesis …
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The development of gene silencing strategies for plant parasitic nematodes
… (RNAi) mechanism in two economically important plant parasitic nematodes (PRNs), the potato cyst nematode Globodera pallida and the root knot nematode Meloidogyne incognita. Much of the work contributing to this project has advanced our understanding of RNAi in these nematodes, and may also have …
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The nervous system of plant-parasitic nematodes and their behaviors
… fungi in the soil. However, some nematodes are parasitic to other animals and plants and have a huge impact on human health and agriculture worldwide. The nervous system of the non-parasitic nematode Caenorhabditis elegans has been studied extensively. Based on C. elegans and a few other …
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Plant-parasitic nematodes: from genomics to functional analysis of parasitism genes
… practically all ecological niches, including plants. Plant-parasitic species live on plant roots, causing substantial damage to the plant and hampering its development. As such, they cause gigantic economical losses in crop production. We used a molecular approach to analyze the …
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Developmental biology of heterodera glycines (soybean cyst nematode) and other plant - parasitic nematodes
… fungal feeders, while many nematodes species are parasitic to animals or plants and have a huge impact on human health and agriculture worldwide. Sedentary plant-parasitic nematodes (PPN) like Heterodera glycines, among the most damaging pathogens to agriculture production. The sedentary nematodes …
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Cloning and Characterization of Putative Parasitism Genes From the Plant Parasitic Nematode Meloidogyne Javanica
*This dissertation is a compound document (contains both a paper copy and a CD as part of the dissertation). The CD requires the following system requirements: Internet Browser; Microsoft Office; Quicktime; Windows MediaPlayer or RealPlayer.
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The Ecology and Distribution of Plant-Parasitic Nematodes on Three Farms in Southern Illinois
Made available in DSpace on 2014-12-10T23:41:26Z (GMT). No. of bitstreams: 1 7207051.pdf: 2816298 bytes, checksum: 49768475d510a2081fcb348736045820 (MD5) Previous issue date: 1971
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Molecular analysis of migratory plant-parasitic nematodes with a focus on plant cell wall modifying enzymes
Plant-parasitic nematodes cause a considerable amount of crop damage worldwide. These nematodes all have a stylet to damage plant cells mechanically, but through which they also secrete proteins important for their infection process. Most studies on genes encoding these so-called parasitism …
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The incidence of plant-parasitic nematodes on sugarcane in Queensland, and studies on pathogenicity and associated crop losses, with particular emphasis on lesion nematode (Pratylenchus Zeae)
… In the last 30 years, plough-out and replant (no fallow) has increased, as has reliance upon inorganic fertilisers, and intensive tillage to remove soil compaction. An associated decline in the productive capacity of the soil to grow sugarcane has been identified, and has been termed …
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Management strategies for control of soybean cyst nematode and their effect on the nematode community
… yield-limiting pathogen on soybean and various plant-parasitic nematodes can damage corn. Additionally, the nematode community is a useful bioindicator for soil health. In chapter 1, relevant research is reviewed. Chapter 2 describes experiments testing ten organic soil amendments at various …
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An investigation into the potential of crude and partially separated material of selected non–crop plant species as control agents of root–knot nematodes (Meloidogyne incognita) in tomato
Plant-parasitic nematodes (PPN) are a serious problem in vegetable production and can cause severe damage to several crops. In rural, low-input farming nematode damage is much higher and yields can be completely destroyed. Some Commercial nematicides have been withdrawn from the market due to …
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Molecular characterization of CLE peptide mimicry during cyst nematode pathogenesis
… OF MISSOURI-COLUMBIA AT AUTHOR'S REQUEST.] Plant-parasitic cyst nematodes establish intimate parasitic relationships with their hosts by penetrating the root as motile juveniles and migrating intracellularly until they reach the root vasculature where they select a single cell to initiate a …
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Analysis of Genes Expressed by Meloidogyne incognita Males: Generation of ESTs and Comparative Genomics
… knowledge that has revolutionized the study of plant parasitic nematode biology and disease. Meloidogyne incognita is one of the most devastating plant parasitic nematodes worldwide and has proven to be a prime example of the utility of comparative genomics in the investigation of plant …
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Nematode Community Structure and Indicators of Biologically-Based Fertility: Influence of Management During Transition to Certified Organic Production
… associated with soil resource condition. Plant parasitic, predators and omnivorous nematodes were related with soil moisture and bulk density in a less consistent pattern. Nematode indicators, based on family taxonomic identification, were evaluated using standard and multi-date sampling …
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Automated soybean cyst nematode extraction unit
The soybean cyst nematode (SCN) is a plant parasitic roundworm of soybeans responsible for an estimated $0.7-1.2 billion reduction in annual yield loss. In order to manage yield loss due to SCN, soybean producers employ a nematode management plan which utilize extensive soil sampling to assess SCN …
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The role of heterodera glycines biotin synthase in the nematode-soybean interactions
… glycines, the soybean cyst nematode (SCN), is a plant-parasitic nematode capable of manipulating host plant biochemistry and development. Many studies have shown that the nematode has acquired genes from bacteria via horizontal gene transfer events (HGTs) that have the potential to enhance …
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Acción nematicida (Globodera rostochiensis) y metabólica del suelo, en procesos de biodesinfección, mediante la aplicación de enmiendas de origen animal, vegetal y antrópico
… novedosa, muy sensible. Esta tesis doctoral se plantea, en primer lugar, conocer los componentes enzimáticos relacionados con la acción nematicida sobre G.rostochiensis y, en segundo lugar averiguar, si es posible, en qué ámbito enzimático/físico-químico del suelo se integra y a quién se puede …
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Diversity and relationships of South Africa's fig-associated nematodes
Parasitic nematodes of the fig microcosm have received limited attention in South Africa. I have assessed the molecular diversity of nematodes present in the native South African species and discovered 24 undescribed species. Two were previously described but the descriptions need reviewing. I have …
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