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 13 of 13 for “"plant defense responses"”.
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Characterization of Host Plant Defense Responses to Parasitization by <I>Orobanche aegyptiaca</I>
<I>Orobanche</I> (spp.) are parasitic plants that attack the roots of many important crops. <I>O. aegyptiaca</I> penetrates the host root (aided by digestive enzymes) and forms connections to the host vascular tissue, from which it will withdraw all of its water and nutrient requirements. In order …
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HOOKLESS1 REGULATES RESPONSES TO PATHOGENS AND ABSCISIC ACID THROUGH INTERACTION WITH MEDIATOR18 AND ACETYLATION OF WRKY33 AND ABI5 CHROMATIN
… that the loss of function hls1 mutant plants have broad effects on the plant development such as early senescence and flowering, seed insensitivity to ABA as well as plant defense responses including enhanced susceptibility to the necrotrophic pathogen Botrytis cinerea and the …
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Understanding the impact of Russian wheat aphid-associated microbes on plants
Plant-insect-microbe 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, …
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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
… biotic 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 …
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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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Pathogen-induced protein secretion in plants.
… mannitol is an important carbohydrate in many plants and fungi that has well-documented roles in both metabolism and osmoprotection. In addition, mannitol is an antioxidant, and as such might play a role in host-pathogen interactions. Research suggests that pathogenic fungi secrete mannitol …
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Investigations on the role of mitogen-activated protein kinases 11 and 17 in defense response of Arabidopsis thaliana
Priming of defense for a stronger and faster response to abiotic and biotic stress is an important part of acquired immunity in plants and animals. Recent findings revealed the involvement of the two mitogen-activated protein kinases MPK3 and MPK6 in the regulation of priming in Arabidopsis …
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Gene expression and signaling in Rxo1 governed innate immunity in cereals
… temporal expression profiles of nonhost and host responses to isogenic strains of Xanthomonas oryzae pv. oryzae (Xoo), the rice bacterial blight pathogen, and Ba with and without the Xoc type III secreted effector gene avrRxo1. Xoc AvrRxo1 induces disease resistance in maize when delivered by Xoo …
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Histone Variant H2A.Z Substitution Mediated by the SWR1-like Complex is a Novel Transcriptional Regulatory Mechanism Controlling Defense Genes and Immunity in Plants
Plants have evolved a complex immune system as a result of an evolutionary arms race between the host and various pathogens. One of the most vigorous immune responses in plants involves resistance (R) proteins, which detect the presence of effector molecules from pathogens and trigger a large-scale …
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The role of autophagy in arabidopsis thaliana during biotrophic and hemibiotrophic fungal infections
A plant's response to pathogen infection is tailored dependent on infection strategy. Successful plant pathogens employ various infection strategies to avoid or reduce plant defense responses for the establishment of host compatibility. Autophagy is a non-selective degradation pathway conserved in …
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Cytokinin-mediated processes promote heat-induced disease susceptibility of plants to bacterial pathogens
… to 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 …
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An investigation of gene expression, alternative splicing and nonsense-mediated decay in potato in response to Phytophthora infestans infection
Plants have evolved systems to defend against pathogens and adapted pathogens deliver effector proteins inside host cells to suppress these defences. Effectors are detected by immune receptors: the cytoplasmic nucleotide binding leucine-rich repeat (NB-LRR) proteins, leading to effector-triggered …
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Key roles of glutamate metabolism and cuticle permeability in the multifaceted defense response of the abscisic acid deficient sitiens tomato mutant against Botrytis cinerea
… result of a ping-pong-type co-evolution, plants have devised sophisticated defense mechanisms to cope with the constant threat of pathogenic microorganisms. These mechanisms are diverse, varying from constructing physical barriers in order to mechanically halt pathogen penetration, to de …