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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 17 of 17 for “"nitrogen starvation"”.
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Analysis of Nitrogen starvation induced filamentous growth and characterization of putative essential genes in the human fungal pathogen, Candida albicans
1. Zusammenfassung Candida albicans ist ein opportunistisch pathogener Hefepilz, der sowohl oberflächliche Infektionen der Schleimhaut als auch lebensbedrohliche systemische Infektionen hervorrufen kann. Obwohl die Fähigkeit von C.albicans Infektionen auszulösen weitgehend vom Immunstatus des Wirts …
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Algae and cyanobacteria platforms for engineering biofuel production
… model green alga, were subjected to nitrogen starvation to examine carbon storage and partitioning between starch and lipid synthesis. The starch-less mutant, BAF-J5, was found to store up to 75% of dry cell weight as fatty acid when grown photoheterotrophically under nitrogen …
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Algae and cyanobacteria platforms for engineering biofuel production
… model green alga, were subjected to nitrogen starvation to examine carbon storage and partitioning between starch and lipid synthesis. The starch-less mutant, BAF-J5, was found to store up to 75% of dry cell weight as fatty acid when grown photoheterotrophically under nitrogen …
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Characterization of Two Genes Up-regulated During Heterocyst Development in the Cyanobacterium Anabaena sp. strain PCC 7120.
… in a manner similar to plants and is capable of nitrogen fixation. This organism has developed a necessary spatial separation of the incompatible processes of photosynthesis and nitrogen fixation, as nitrogen fixation is sensitive to oxygen that is produced during photosynthesis. A differentiated …
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Some aspects of the nitrogen nutrition and growth of Gracilaria gracilis grown by suspended cultivation in Saldanha Bay, South Africa
… by upwelling. This study documents the extent of nitrogen starvation during this period and investigates some possible methods of managing this problem. Nitrogen content, C:N ratio and stable isotope abundances of C and N were obtained for material grown for varying lengths of time, material grown …
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Improving biomass of the marine microalga Nannochloropsis oculata by chemical elicitation
… biofuels. Stress culture conditions, such as nitrogen starvation, are favourable for inducing the biosynthesis of certain metabolites (e.g., lipids), but supplementation with phytohormones is another viable method for promoting specialised metabolite accumulation. The eustigmatophyte …
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Post-transcriptional coordination by an RNA-binding protein
… morphogenetic switch that occurs in response to nitrogen starvation and requires alterations in cell growth, cell cycle, and cell wall functions. Tyl element retrotransposition is also induced under conditions of nitrogen starvation. I describe a role for the RNA-binding protein Khdl in …
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Regulation of GAP1 permease sorting in Saccharomyces cerevisiae
… of Saccharomyces cerevisiae is regulated by the nitrogen source in the growth medium. During growth on a non-preferred nitrogen source or during nitrogen starvation, Gaplp is sorted to the plasma membrane, where it is active and can transport amino acids into the cell. During growth on a …
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Lost in Starvation: How the interplay between physiology and ecology impacts bacterial persistence in a patchy landscape
… phenotypic changes undergone by bacteria during starvation affect their ability to search for and acquire nutrients. Here, we quantified the physiological responses of the marine heterotroph Vibrio coralliilyticus to carbon and nitrogen starvation and its subsequent success at foraging in a …
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Molecular dissection of Alternaria brassicicola pathogenesis mechanisms
… length cDNA library of genes expressed during nitrogen starvation. The first library was created to be enriched for genes expressed during spore germination on the plant leaf surface using SSH. To create this library, RNA was isolated from A. brassicicola spores incubated in water and on the …
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Novel Insights into the Regulation of Autophagy in Saccharomyces Cerevisiae
… autophagy is normally triggered by nutrient starvation. However, by using a prototrophic strain, I discovered that autophagy can be strongly induced upon switch from a rich medium (YPL) to a minimal medium (SL) without nutrient starvation. This new autophagy-inducing condition was termed …
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Molecular and Physiological Aspects of Arbuscular Mycorrhizal Symbiosis with near-Isogenic White Clover: A Gene Expression Study
… and can form effective associations with both nitrogen-fixing Rhizobium and phosphate-scavenging arbuscular mycorrhizal fungi (AMF). Understanding the genetic control of plant-AM interactions will allow clover breeders to develop genetic markers for selection of phenotypes favourable to AM …
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Phosphate starvation alters calcium signalling in roots of Arabidopsis thaliana
… or whether signalling is altered under P starvation conditions. The aim of this PhD project was to characterise the use of Ca2+ ions, particularly cytosolic free Ca2+ ([Ca2+]cyt), in stress signalling by P-starved roots of the model plant Arabidopsis thaliana. The hypothesis was that under …
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The development and application of mass-spectrometry-based tools to monitor proteome remodeling in microbes
… degradation drives proteome remodeling under nitrogen starvation conditions, with selective autophagic degradation of peroxisome supporting the cells transition from methanol media to glucose media. In contrast, I uncover that synthesis and growth-coupled dilution is the primary driver as K. …
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Characterization of a minimal abiotic stress-inducible promoter in the development of a binary vector for crop protection
… efficiency. This study optimized a nitrogen-starvation regeneration protocol to enable efficient callus regeneration from tobacco leaf discs, consequently establishing a versatile platform for high-throughput promoter screening. The responsiveness of the ABR1Pr to multiple abiotic …
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Investigating mechanisms of triacylglycerol synthesis induced by nitrogen depletion in the diatom Phaeodactylum tricornutum and characterising its diacylglycerol acyltransferases and phospholipid: diacylglycerol acyl transferase
… development for biofuels and human nutrition. Nitrogen depletion is a well-studied experimental system for producing high levels of TAG in P. tricornutum. Identication of the mechanisms involved in TAG synthesis holds promise for increasing TAG yields. Numerous studies of nitrogen depletion …
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Role of Gcn4p in nutrient-controlled gene expression in Saccharomyces cerevisiae
Unter Aminosäure-Mangelbedingungen schaltet die Bäckerhefe Saccharomyces cerevisiae die sogenannte Allgemeine Kontrolle der Aminosäure-Biosynthese" ein. Gcn4p, der Transkriptionsfaktor dieses Systems, aktiviert die Expression von über 50 Genen, die in die verschiedenen Aminosäure-Biosynthesewege …