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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 20 of 39 for “"phenylpropanoid"”.
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Paralogous genes in Arabidopsis thaliana contribute to diversified phenylpropanoid metabolism
… in specialized metabolism. Using the Arabidopsis phenylpropanoid pathway as a model, in this thesis I describe two cases where neofunctionalization and subfunctionalization of duplicated genes contributed to metabolite diversification.^ The phenylpropanoid pathway intersects with primary …
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Anti-oxidant Action and Anti-aging Activity of Phenylpropanoid Compounds
… between structure and biological activity of phenylpropanoids, we measured effects of phenylpropanoids on anti-oxidant and anti-inflammatory activity and effect of caffeic acid on wound healing in skin-incised mice. Materials & methods: The cinnamic acid derivaties, C_(6)-C₃ compounds, of …
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Structural Biology of Cytochrome P450 Monooxygenases in Arabidopsis Thaliana Phenylpropanoid Pathway
… rate-limiting hydroxylation steps in the phenylpropanoid pathway. Homology modeling studies of the P450-substrate interactions in these four P450s have indicated that substrates bind in similar orientations and locations in all four P450s. De novo models of several bacterial and mammalian …
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Investigating Extreme Lifestyles Through Mangrove Transcriptomics
… , which are at major regulatpry points in the phenylpropanoid pathway. I have identified one DFR, two CHS, and ten PAL genes in R. mangle . Differential expression patterns within a family as well as co-expression patterns across families were identified in different tissues indicating possible …
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KINETICS, REGULATION AND PURIFICATION OF L-PHENYLALANINE AMMONIA-LYASE FROM GERMINATING LETTUCE SEEDS (PHENYLPROPANOIDS, ENZYME, ALPHA-AMINOXY - BETA-PHENYLPROPIONIC ACID)
… of PAL by various substrate analogues and phenylpropanoid compounds was studied. Substrate analogues like D-phenylalanine, p-fluorophenylalanine, (beta)-phenyllactic acid and tryptophan were found to inhibit PAL competitively whereas tyrosine did not show any inhibition of enzyme activity. …
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Impact of growth stage, supplemental red LED, and salinity stress on the quality and aroma attributes of hydroponic fennel (Foeniculum vulgare Mill.)
… and aroma compounds accumulation, particularly phenylpropanoids such as (E)-anethole ("sweet", "anise"), estragole ("anise", "herbal"), and p-anisaldehyde ("floral", "sweet"). Transcriptome analysis showed upregulation of key genes involved in phenylpropanoid biosynthesis, including eugenol …
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Development and Application of a High-Throughput Assay for Discovery of Starch Hydrolase Inhibitors
… to the inhibition of starch hydrolase. Phenylpropanoid sucrose ester compounds, smilaside A and smilaside D were isolated from extracts of the Smilax glabra rhizome. Both compounds displayed negligible inhibitory effects towards porcine pancreas a-amylase, but weak and moderate …
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Study of podophyllotoxin biosynthesis in Podophyllum species
Lignans are a structurally diverse group of phenylpropanoid metabolites widely distributed throughout the plant kingdom. Their biogenetic pathway has generally been viewed to occur via coupling of two monomeric moieties, with subsequent modifications as required to afford the various Iignan …
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NATURAL POLYPHENOLS AS LEAD COMPOUNDS IN THE SYNTHESIS OF ANTITUMOR AGENTS AND OTHER USEFUL PRODUCTS
… polyphenols belonging to the stilbenoid and phenylpropanoid families, namely resveratrol or caffeic acid analogues. To this purpose we employed both chemical and enzymatic methods; in particular, metal-mediated reactions were used for the synthesis of nitrogenated lignans with a benxanthene …
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Factors influencing the infectivity of the potato cyst nematodes, Globodera rostochiensis and G. pallida
… tissues indicated the accumulation of phenylpropanoid compounds which may be involved in the expression of nematode resistance.
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MOLECULAR APPROACHES TO ANALYZE HORIZONTAL RESISTANCE AMONG PLANT SPECIES (MAIZE, SOYBEAN, AND ARABIDOPSIS) TO SYNTENIC FUSARIAL PATHOGENS (F. GRAMINEARUM AND F. VIRGULIFORME)
… others (secondary metabolism). For example, the phenylpropanoid pathway response was different between the two species. In contrast to soybean, the phenylpropanoid pathway was not fully activated during the resistance response in Arabidopsis. Therefore, soybean and Arabidopsis did not share …
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Application of bacterial ligninase enzymes from rynchophorus ferrugineus’s gut consortium in agropulp biodelignification
Lignin is a complex phenylpropanoid heteropolymer entangled around cellulose and hemicellulose fibre. It is recalcitrant towards degradation, thus pose a major problem in obtaining good quality fibre. Moreover, the conventional degradation methods (chemically and mechanically) consume vast amount …
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An Investigation of Plant Hypersensitive Response and Photosynthesis Inhibition on a Genomic and Physiological Scale
… The differences included distinct regulation of phenylpropanoid production in response to two treatments. The infection of P. syringae resulted in decreased transcript of D1 but did not affect the steady state level of D1 protein. Bentazon treatment benefited bacterial multiplication in planta …
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Circadian regulation and phytohormone responses of cytochrome P450 monooxygenase genes in Arabidopsis
… and demonstrated that P450s involved in phenylpropanoid, carotenoid, oxylipin, glucosinolate and brassinosteroid biosynthese pathways are circadian-regulated. The next phase of my research investigated the circadian rhythms of P450 genes under different phytohormone treatments including …
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Molekulare, physiologische und biochemische Charakterisierung der Genfamilie für 4-Cumarat:Coenzym A Ligase aus Sojabohne (Glycine max L.)
… Hydroxyzimtsäure-Ester zur Synthese spezifischer Phenylpropanoide bereitstellt. In vielen Pflanzen kommen strukturell und funktionell sehr ähnliche 4CL-Isoformen vor, weshalb diesem Enzym dort nur eine beschränkte regulatorische Funktion bei der Verteilung der unterschiedlich substituierten …
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Structural studies on the biosynthesis and biological functions of natural products
… represent the key branching point in the phenylpropanoid pathway in plants. They are the precursors to many molecules that are important either pharmaceutically or for plant development. Studies on 4-coumarate:CoA ligase (4CL), the enzyme that synthesizes 4-coumarate-CoA, are thus crucial …
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Estudio del origen genético de la variedad de vid Garnacha Blanca, de su diversidad fenotípica y de los efectos moleculares asociados a la variación en el color de la uva
… role of VviMYBA1 and VviMYBA2 genes in phenylpropanoid biosynthesis pathway and in triggering protection againts pathogens and abiotic stress in the berry skin during berry ripening. In addition, white grapes accumulated higher levels of alternative photoprotective molecules …
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Gene regulation in a pathogen-plant interaction: soft rot erwinias versus potato tubers
… (HMGR), key genes in the biosynthesis of phenylpropanoid- and terpenoidderived compounds believed to be important in plant defenses. Ecc inoculation caused much more rapid and greater increases in PAL mRNA and enzyme activity levels in potato tuber than wounding alone. Escherichia coli, a …
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Functional analysis of selected DOF transcription factors in the model plant Arabidopsis thaliana
… metabolism and affects production of various phenylpropanoid compounds in a tissue and environmental specific manner. It was found that under certain stress conditions AtDOF4;2 negatively regulates flavonoid biosynthetic genes whilst in certain tissues it activates hydroxycinnamic acid …
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