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 68 for “"Plant cell wall"”.
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Molecular interactions of plant cell wall polymers
Specialised plant cells produce thickened cell walls, called secondary cell walls comprised of lignocellulose. The main polymers in lignocellulose are cellulose, xylan, galactoglucomannan and lignin. Lignocellulose forms the majority of biomass on the planet and its utilization for construction, …
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Xylan chain length and plant cell wall assembly
The plant cell wall is a structure surrounding plant cells to serve signalling, developmental, and structural functions. In woody tissues, the cell wall is composed of cellulose (40-60%), lignin (20-30%), and hemicelluloses (20-30%). The plant cell wall is the largest source of renewable carbon …
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Integrative analysis of heterogeneous plant cell wall related data
Plant cell walls are complex structures that underpin plant growth and are widely exploited in diverse human activities thus placing them with a central importance in biology. Cell walls have been a prominent area of research for a long time, but the chemical complexity and diversity of cell walls …
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Bio-based composites that mimic the plant cell wall
… One of the most significant materials is the plant cell wall. The plant cell wall is a composite of oriented cellulose microfibrils reinforcing a lignin/hemicellulose matrix. In principle, the plant cell wall composite is designed much like a synthetic fiber-reinforced polymer composite. …
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Evolutionary and functional study of plant cell wall polysaccharide glucomannan
My PhD thesis focused on the cell wall polysaccharide mannan; I investigated the function, evolution, and mutant phenotypes of its synthase. The main chapter consists of three independent parts. Chapter2 addresses the question, “In which group of evolutionary stages does β-GGM …
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Plant cell wall degrading enzymes and their potential application to biofuel production
… stocks will always be a matter of great concern Plants have evolved photosynthetic mechanisms in which solar energy is used to fix CO2 into carbohydrates. Thus, combustion of biofuels, derived from plant biomass, can be considered a potentially carbon neutral process. Plants cell walls which are …
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Engineering yeast to synthesize high-value natural products from plant cell wall
… bioenergy and biorefineries based on ligonocellulosic plant materials offers a promising solution to address global concerns about limited natural resources and climate change. Economically feasible production of biofuels and chemicals from plant biomass requires complete and efficient …
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Defining the role of cellulose synthase-like M genes in the plant cell wall
… budget, has led to over 500 sequenced genomes of plants currently. Genomic data and resources are now publicly available in databases and online sources, providing opportunities for using functional genomics to understand the role of genes of interest. The cellulose synthase-like M (CslM) …
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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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Untersuchungen zur Biosynthese der pflanzlichen Zellwand = [Identification and characterization of genes involved in plant cell wall synthesis]
Even though the structure of the plant cell wall is by and large quite well characterized, its synthesis and regulation remains largely obscure. However, it is accepted that the building blocks of the polysaccharidic part of the plant cell wall are nucleotide sugars. Thus to gain more insight into …
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Biochemical and molecular analyses of plant cell wall degrading enzymes from the rumen bacterium Ruminococcus albus 8
… on microorganisms inhabiting the rumen to digest plant matter for subsequent fermentation to provide the host with the majority of its energy demands. Ruminococcus albus 8 is a rumen bacterium that efficiently degrades and ferments plant cell wall polysaccharides, such as cellulose and …
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Molecular ecology of plant cell wall hydrolysis by mixed cultures of Ruminococcus albus 8, Ruminococcus flavefaciens FD-1 and Fibrobacter succinogenes S85
… as monocultures, dicultures and in triculture on cellobiose, cellulose and alkaline hydrogen peroxide-treated wheat straw to study competition among the three bacterial species on these substrates. The cellubiose-grown cultures were incubated at 39$\sp\circ$C for 10 hours and sampled hourly. The …
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Comparative Gene-Centric Metagenomics of the Rumen Microbiome
… effective system for the conversion of plant cell wall biomass to microbial protein, short chain fatty acids, and gases including hydrogen and methane. As such, it provides a unique genetic resource for plant cell wall degrading microbial enzymes that could be used in the production of …
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Adsorption of Biomacromolecules onto Polysaccharide Surfaces
Plant cell wall polysaccharides are abundant natural polymers making them potential sources for sustainable and biodegradable materials. Interfacial behavior, including adsorption and enzymatic degradation, of several plant cell wall polysaccharides and their derivatives were studied with a quartz …
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Molecular mechanisms of pathogenesis incited by Erwinia carotovora subsp. carotovora
… subsp. Carotovora (Ecc) incites soft-rot on many plants. It is believed that soft-rot is due to the concerted activity of extracellular enzymes. Recombinant DNA techniques were used to study the molecular basis of pathogenesis incited by Ecc. Specifically, a clone library of Ecc strain EC14 DNA in …
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A short & sweet story of CHO
… resonance (SSNMR) study of nearly intact plant cell walls along with the computational study of glucose and malonic acid are presented. Previously unassigned <sup>13</sup>C chemical shifts are presented for the various carbohydrates in the primary plant cell wall of <em>Arabidopsis …
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The transcription factor, fixK, plays a central role in carbon source metabolism and cellulose synthesis in Komagataeibacter species
… and K. hansenii ATCC 23769 are model bacterial cellulose producers. This thesis investigated both carbon source utilization and the role that a Crp/Fnr transcription factor, FixK, plays in bacterial cellulose biosynthesis. Extracellular proteins secreted by Komagataeibacter were assayed for …
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Synthesis of lignin-carbohydrate model compounds and neolignans
Woody plants are the most abundant renewable resources on the earth. From the paper we consume to the house we live in, our daily lives rely heavily on woody plants. Over the past decades, enormous efforts have been expended to improve the utilization of fiber and wood. For example, much research …
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Adsorption Studies of Polysaccharides and Phospholipids Onto Cellulose
Interactions between biomolecules and cellulose films at solid/liquid interfaces was studied by surface plasmon resonance spectroscopy (SPR), quartz crystal microbalance with dissipation monitoring (QCM-D) and in situ atomic force microscopy (AFM) measurements. This dissertation shows the porous …
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Comparative whole genome transcriptional responses of Ruminococcus albus strain 7 and 8: a case for specialization and niche differentiation
… bacteria in the rumen that contribute to plant biomass as well as vitamin utilization in host nutrition. To better understanding of host-microbe interactions, it is relevant to establish the model for fiber degradation and vitamin metabolism of the dominant fibrolytic bacteria and …
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