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 19 of 19 for “"Conidiation"”.
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The analysis of gene transcripts associated with conidiation in the insect pathogenic fungus, Metarhizium anisopliae /
… the insect cadaver. The genes associated with conidiation have not yet been studied in this fiingus. hi this study we used the PCR-based technique, suppression subtractive hybridization (SSH) to selectively amplify conidial-associated genes in M. anisopliae. We then identified the presence of …
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Primary characterization of genes involved in the colony development of the insect pathogenic fungus Metarhizium anisopliae /
… may negatively affect the ecosystem. Controlling conidiation is a potential means of limiting the release of engineered strains since conidia are the infective propagules and the means of dispersal. The purpose of this study was to research the colony development of M. anisopUae to identify …
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Lipid accumulation and utilization during microcycle growth of Aspergillus niger.
… was decreased. Each stage in this microcycle conidiation was photographed and dry weight was determined. Aberrant growth forms sometimes occurred and these are described with the measures taken to attempt to minimize such problems. The lipid content and composition was investigated throughout …
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Biochemical Genetic Analysis of Blue Light Responses in Neurospora Crassa
… for the photosuppression of circadian conidiation and reduced the photosensitivity for phase shifting and carotenogenesis to about 1/16th and 1/4th of normal, respectively. (ii) Riboflavin analogs were used to demonstrate that flavins can function as photoreceptors. The analogs …
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A greenhouse screening method for resistance to gray leaf spot in maize
… much more severe host response than the latter. Conidiation of C. zeae-maydis was examined with the mycelial inoculation method in the greenhouse. Conidiophores were found emerging from stomata as early as 15 days after inoculation in B73 and M017 and limited only to necrotic tissue. No …
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Characterization of PRD-1 Mutation in Neurospora crassa
In Neurospora crassa, rhythmic conidiation is controlled by several oscillators such as FRQ/WCC and FLO. The frequency (frq) gene and white collar genes (WC-1 and WC-2) are the most important components of the FRQ/WCC oscillator and prd-1 and prd-2 genes could be important components of the FLO. …
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Genetic mapping of novel mutation, UV90, and its effects on the Neurospora crassa circadian system
… FLO. One mutation, UV90, disrupts the rhythmic conidiation of the FLO, and locating this gene will lead to better understanding of the FLO mechanism. Mapping of the UV90 gene location was performed using Cleaved Amplified Polymorphic Sequence (CAPS) markers and gene knockout screens. DNA …
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The Role of G-Protein Signaling in Pathogenesis in Cercospora zeae-maydis
… detection, virulence, fungal development, conidiation, secondary metabolism, and pathogenesis in many plant pathogenic fungi. This research explored the role of each G-protein α (Gpα) subunit of C. zeae-maydis in pathogenesis. To this end, the three Gpα subunits identified in C. zeae-maydis …
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Sleepers and Creepers, Colony Polymorphisms in Metarhizium robertsii
… suspension of M. robertsii. Key genes in the conidiation pathway, such as the methyltransferase MrDIM-2, may be relevant for differentiation between the Sleeper and Creeper/Mixed phenotypes. Expression levels of the Sleeper phenotype were found to be significantly lower than the Mixed or …
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Study of Ochratoxin A biosynthesis by Aspergillus ochraceus and incidence of ochratoxigenic fungi on Wine Grapes from Southern Illinois
… in OTA production accompanied with reduction in conidiation, a defect in beta-oxidation and an abnormal mitochondrial phenotype. A yeast, two-hybrid screen revealed that Aomdv1 interacts with proteins involved in regulating mitochondrial functions necessary for mycotoxin production. To further …
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Protein Kinase A Regulates Hyphal Growth by Relieving the Interaction of MoSfl1 with the Cyc8-Tup1 Co-repressor in Magnaporthe oryzae
… mutant. The double mutant had severe growth and conidiation defects. It was non-pathogenic though the intracellular cAMP level and activation of the Pmk1 MAP kinase were increased. Interestingly, the double mutant spontaneously produced fast-growing suppressors after cultivation on oatmeal agar …
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Role of Striatin Complexes in the Control of Development and Secondary Metabolism of the Filamentous Fungus Aspergillus nidulans
… responses, fungal fruit body formation, asexual conidiation and secondary metabolite SM production.
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Analysis of the role of velvet and laeA in the molecular interactions between grass and Epichloë fungal symbionts
… hyphal morphology, resistance to stress, and conidiation in nutrient limited conditions. In planta studies showed the requirement for both genes in establishing and maintaining a compatible interaction, with high levels of seedling death and a drastically reduced infection rate after …
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The Redox and Systems Biology of Ergothioneine Biosynthesis in Aspergillus fumigatus
… glutathione biosynthesis, resulted in attenuated conidiation and affected cell wall integrity. EGT deficiency specifically decreased resistance to high H2O2 levels, which strongly infers functionality as an auxiliary, high-level, antioxidant. Quantitative proteomic analysis revealed significant …
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Functional Analysis of Secondary Metabolite Biosynthesis-Related Genes in Alternaria brassicicola
… of intracellular reactive oxygen species during conidiation and pathogenesis in both plant and animal pathogenic fungi. Collectively our results indicate that small molecule nonribosomal peptides and polyketides in A. brassicicola play diverse, but also fundamental, roles in fungal development …
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Role of UV90 Gene in the FRQ-Less Oscillator of the Neurospora Crassa Circadian System
… nutritional conditions and showed altered conidiation rhythms. My findings establish a connection between the TOR pathway and circadian rhythms. I conclude that VTA is a key protein in the complex that anchors TOR to the vacuole. It plays a role in maintaining circadian rhythmicity by …
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Implementation of genetic and untargeted metabolomics to study the role of the terpene synthase vir4 from Trichoderma virens in plant-microbe interactions : A thesis submitted in partial fulfilment of the requirements for the Degree of Doctor of Philosophy at Lincoln University
… compounds, b) fungal development (fungal growth, conidiation, germination and colony morphology, pigmentation and hydrophobicity) and, c) modulated the non-volatile fungal metabolome. Using Zea mays as an agriculturally relevant plant model, the role of T. virens volatile terpenes as facilitators …
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Phylogeny, histological observation, and in vitro fungicide screening and field trials of multiple Colletotrichum species, the causal agents of grape ripe rot
… genotypes and C. nymphaeae, as well as secondary conidiation with isolates of C. aenigma, C. fructicola-like genotype 3, and C. nymphaeae on blooms. And finally, benzovindiflupyr, cyprodinil + fludioxonil pre-mix, and potassium phosphite + tebuconazole were identified as candidates for chemical …
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IDENTIFICATION AND CHARACTERIZATIONS OF PATHOGENICITY GENES IN FUSARIUM VIRGULIFORME, THE CAUSAL AGENT OF SOYBEAN SUDDEN DEATH SYNDROME (SDS)
… a complete loss of virulence as well as impaired conidiation, conidiophore development and pigmentation in the fungus. The FvΔstr1 mutant also failed to colonize the vascular tissues of roots of inoculated soybean plants. The results suggest that FvSNF1and Fvstr1 have critical roles in …