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 52 for “"Defense Responses"”.
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Soybean Resistance and Defense Responses Against Aphis Glycines
… and (iv) identifying resistance-related defense responses. Antibiosis in the resistant soybean genotypes ('Dowling', 'Jackson', and PI200538) was demonstrated by a significant decrease in fecundity and longevity and increased mortality of A. glycines, compared with two susceptible …
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Role of the COP9 Signalosome In Defense Responses In tomato
… the involvement of the CSN in the regulation of defense responses is largely unknown. It was shown that silencing of the CSN subunit <em>CSN5</em> resulted in reduced wound-and herbivory-induced levels of jasmonic acid and reduced expression of wound-response genes. Unexpectedly, these plants …
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REGULATION OF DEFENSE RESPONSES MEDIATED BY BON1 AND BAP2 IN ARABIDOPSIS THALIANA
… infections. Comprehension of the natural defenses against these threats could enable the production of genetically modified plants with enhanced innate immunity without the use of chemicals to which insects and microbes are renown for developing resistances to. Plants have three main …
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Characterization of Host Plant Defense Responses to Parasitization by <I>Orobanche aegyptiaca</I>
… To investigate how parasitism effects host defense pathways, we are studying the patterns of expression of host genes known to be involved in various aspects of plant defense responses. With respect to local defense responses, two genes of the isoprenoid pathway were studied, one of which is …
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Analysis of defense responses in the barley-Rhynchosporium secalis pathosystem / by Seyed-Reza Zareie.
This thesis investigates the resistance response of barley towards R. secalis by examining the in vitro interaction between various components of the apoplastic fluid and the fungus.
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MED9, a Mediator Complex Component, and its Interacting Protein MORC1 Balance Growth and Defense in Arabidopsis
… dynamics assessments at multiple-time points of defense genes, up- and down-regulated, reacting to avirulent P. syringae revealed that med9 morc1/2 expressed some defense genes in a slow but sustained manner, unlike its low-ordered mutants. This expression pattern may explain the restored …
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Dissecting Transcriptional Regulation of Rpp8 in Arabidopsis thaliana
… have evolved physical barriers and inducible defense responses to combat microbial pathogens. Inducible responses are mediated by R proteins, which recognize invading pathogens. R proteins must be precisely regulated to provide effective resistance, without inhibiting normal plant growth. …
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Molecular cloning, characterization, and expression of 3-hydroxy-3-methylglutaryl coenzyme a reductase gene from tomato
… growth regulators, carotenoids, antimicrobial defense compounds, and numerous other isoprenoids. To initiate molecular studies of HMGR in relation to defense responses in plants, we utilized yeast HMGR cDNA sequences to isolate tomato genomic sequences encoding HMGR. The nucleic acid sequence …
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HOOKLESS1 REGULATES RESPONSES TO PATHOGENS AND ABSCISIC ACID THROUGH INTERACTION WITH MEDIATOR18 AND ACETYLATION OF WRKY33 AND ABI5 CHROMATIN
… seed insensitivity to ABA as well as plant defense responses including enhanced susceptibility to the necrotrophic pathogen Botrytis cinerea and the hemi-biotrophic pathogen Pseudomonas syringae DC3000 strain expressing the effector protein AvrRpm1 strain. We show that HLS1 modulates the …
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Understanding the impact of Russian wheat aphid-associated microbes on plants
… interactions shape the outcome of plant defense responses, yet the role of aphid-associated bacteria in modulating host susceptibility remains largely unexplored. This dissertation investigates the influence of bacterial communities associated with the Russian wheat aphid (RWA, Diuraphis …
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Specificity in the ecology and evolution of plant defense against herbivores: Identity and history
… may in turn evolve allocation away from costly defense towards competitive ability. This assumes that plants face a fundamental tradeoff between growth and defense, but we predict that this tradeoff depends on the biotic environment and specificity of plant responses to herbivores. I examined …
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Identification and characterization of an adenosine triphosphate binding cassette (ABC) transporter EcABCB1 involved in the transport of alkaloids in Eschscholzia californica
… and abiotic elicitors, which activates plant defense responses. Sanguinarine accumulated in the media is taken up into the cell through a potential active transport process. A large and widely distributed superfamily of proteins found in bacteria, fungi, plants and animals called adenosine …
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Soybean mosaic virus-soybean interactions: molecular, biochemical, physiological, and immunological analysis of resistance responses of soybean to soybean mosaic virus
… in localized virus and induction of a series of defense responses, but in inhibition of virus replication. However, this resistance was overcome by the resistance- breaking strain, SMV-G4, which induced lethal necrosis (N). Unlike HR, G4 strain was not restricted but spread ina restricted pattern …
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The Sword and the Shield: Active and Passive Defense Against North Korean Nbc and Ballistic Missile Weapons
… threat. It also analyzes the active and passive defense responses required by the threat. It concludes with policy recommendations for the United States to deter and defend against North Korea’s NBC and ballistic missile arsenal.
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New Tools to Understand Mechanisms of Nutrient Transfer from Plants to Biotrophic Pathogens
… may be manipulated by the pathogen to suppress defense responses and extract nutrients.
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Cytokinin-mediated processes promote heat-induced disease susceptibility of plants to bacterial pathogens
… non-optimal, high temperature conditions plant defense responses to pathogen attack are attenuated, leading to a process referred to here as heat-induced disease susceptibility. The plant growth hormone cytokinin is known to regulate responses to both biotic and abiotic pressures, making it an …
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Physiological and cellular characterization of a plant natriuretic peptide
… response to any given stress factors. Systemic defense responses thus provide an attractive model for the study of cell-to-to cell signal transduction pathways that operates over long distances (Lucas and Lee, 2004). Cellular and physiological evidence suggest the presence of a novel class of …
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Regulation of ethylene biosynthesis by mitogen-activated protein kinase cascades in Arabidopsis
… attack, and is an important component of plant defense response to pathogens. All ethylene-regulated processes begin with the induction of ethylene biosynthesis. The committing and generally rate-limiting step in ethylene biosynthesis in plants is catalyzed by a labile enzyme, ACC synthase …
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Effects of a Brief Mindfulness Induction on Death-Related Anxiety
… behavior are referred to as distal and proximal defense mechanisms. Relatively little research has investigated mechanisms to buffer effects of mortality salience. Mindfulness refers to a conscious awareness and acceptance of moment-to-moment experiences. By allowing individuals to take a …
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Towards understanding of plasmodesmal association and regulation using Plasmodesmata-Located Protein 5 as a model
… PD and how it restricts PD permeability during defense responses. To gain insight into the mechanisms underlying PDLP5 targeting and function, a mutagenesis approach in combination with various functional analyses was taken. Subcellular localization studies of the mutant constructs fused to …
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