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Showing 1 to 18 of 18 for “"Pflanzen (Botanik)"”.
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Ein molekularer Mechanismus des „Primings” in Arabidopsis thaliana
In plants and animals acquired immunity to biotic and abiotic stress is associated with priming of cells for faster and stronger activation of defense responses. It has been hypothesized that cell priming involves accumulation of latent signaling components that are inactive until challenge …
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Untersuchungen zur Funktion einer Lipoxygenase in der induzierten Resistenz bei Reis
The phenomenon of systemic acquired resistance (SAR) can be induced by the application of chemical substances like BTH, which is considered as a functional analogue of salicylic acid. Acquired resistance in plants leads to a long-lasting protection against a broad range of pathogens. However, in …
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Comparative study of the subcellular localisation and the N-glycosylation patterns of a recombinant glycoprotein expressed in Oryza sativa, Nicotina tabacum and Medicago truncatula
Nowadays, plants have become a promising alternative over the traditional expression systems for the production of biologically active complex recombinant proteins. So far, research has been focussed on increasing accumulation levels of recombinant proteins expressed in many plant models. On the …
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Untersuchungen zur Funktion von Alb 3 im plastidären Proteintransport von Arabidopsis thaliana
Members of the Oxa1 protein family mediate the integration of proteins in their respective membranes. To the date, homologs within mitochondria (Oxa1p), E. coli (YidC) and chloroplasts (Alb3) have been investigated. Alb3 is the least investigated protein of this triple. A function within thylakoid …
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Physiological, genetic and molecular analysis of two Arabidopsis mutants with defects in normal development
Unlike animal cells, plant cells have a rigid wall and hence cannot migrate. Rather, they are permanently fixed in their relative position to neighbouring cells after cell division. Therefore, for normal plant organ morphogenesis the orientation of the cell division plane is critical. Cortical …
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Eine Untersuchung zur Endozytose in Pflanzenzellen
Endocytosis is a fundamental property of all eukaryotic life. In contrast to animal cells the endosomal system of plants is largely unknown. Recent research indicates a central role of endocytosis as a regulatory mechanism in plant morphogenesis and growth (Baluska et al., 2003; Geldner et al., …
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Isolation von Ascosporen des pflanzenpathogenen Pilzes Venturia inaequalis und Charakterisierung von Antikörperinteraktionen zur Entwicklung eines immunogravimetrischen Sensors
The work presented here was performed in the frame of an interdisciplinary project. The aim of this project was the development of a biosensor detecting ascospores of Venturia inaequalis, the causual agent of apple scap. It was shown, that such a biosensor could be a useful addition to present-day …
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Biochemische und molekularbiologische Untersuchungen zur Beteiligung reaktiver Sauerstoffspezies (ROS) am Wirkungsmechanismus der systemisch erworbenen Resistenz (SAR) in Arabidopsis thaliana (L.) Heynh
Systemic Acquired Resistance (SAR) can be conditioned in Arabidopsis by chemical and biological activators. This acquired resistance to a subsequent infection manifests itself as a phenocopy of the Hypersensitive Reaction (HR) and is correlated with an increased expression of so-called PR genes, …
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Molecular and biochemical analyses of transgenic nicotiana tabacum plants metabolizing glycolate in the chloroplasts
The photorespiratory pathway in C3 plants consumes not only ATP and reducing equivalents but also results in loss of ~ 25% carbon that has been fixed during the process of photosynthesis. In the present study, an alternative biochemical pathway for the metabolism of glycolate was established in the …
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Generation and characterisation of plant produced recombinant antibodies specific to LHRH for treatment of sex hormone dependent diseases
Leutinising hormone releasing hormone (LHRH) is a hypothalamic neurohormone that plays a pivotal role in the endocrine control of reproduction. Acting through its high affinity receptors on pituitary gonadotrophs, it regulates the secretion of gonadotropins. Manipulation of the neuroendocrine …
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A novel approach for the suppression of photorespiration in C 3 plants by gene transfer
In the present study, a novel principle is proposed to increase the CO2 concentration in the vicinity of Rubisco thereby suppressing photorespiration in C3 plants. The pathway is derived from E. coli and converts the glycolate formed during photorespiration into glycerate. Three enzymatic …
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Die epigenetische Regulation des C 4 -Syndroms : belichtungsabhängige Chromatinveränderungen am Promotor der Phosphoenolpyruvat Carboxylase aus Mais (Zea mays L.)
C4 plants have developed a unique mechanism to suppress the undesirable effects of photorespiration by separating primary and secondary CO2 fixation in two different leaf tissues. The primary fixation step takes place in the mesophyll cytoplasm and is controlled by phosphoenolpyruvate carboxylase …
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Studies to influence the carbon metabolism of the C 3 plant Nicotiana tabacum by expressing heterologous enzymes involved in C 4 -like CO 2 fixation
In the present study, heterologous enzymes were overexpressed in the C3 plant Nicotiana tabacum in order to establish a C4-like metabolic pathway ("C4-cycle"). These enzymes include phosphoenolpyruvate carboxylase (PC), NADP-malic enzyme (ME), pyruvate, orthophosphate dikinase (DK), …
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Untersuchung möglicher Effekte von transgenem, insektenresistentem Mais (Bt-Mais) auf Nichtzielorganismen im Boden, sowie Analyse und Bewertung von Beifußpopulationen (Artemisia vulgaris L.) des Maiszünslers (Ostrinia nubilalis Hbn.) als Mittel zur Resistenzverzögerung
1. Acute toxicity tests with the Bt-spray product MVP®II (active substance Cry11Ac) exhibited in Folsomia candida a LC50 of 12,48 mg/g Lufa 2.1 soil and 1,08 mg/g quartzous sand. Presumably this was an effect of seed treatment products. 2. Trypsin-resistant Cry1Ab (Monsanto, SLFA Neustadt) caused …
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Beta vulgaris subsp. maritima an Deutschlands Ostseeküste : Kartierung, genetische und physiologische Charakterisierung und ihre Rolle als Kreuzungspartner für transgene Zuckerrüben
B. vulgaris subsp. maritima (wild beet) has reached a high importance in the context of the deliberate release of genetically modified cultivated beets: as potential crossing partner it faciliates an uncontrollable outcrossing of genetically modified traits. In Germany, it occurs within a short …
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Arabidopsis thaliana class II TGA transcription factors provide a molecular link between salicylic acid and ethylene defense signalling
Pflanzen haben ein kompliziertes Immunsystem evolviert, um sich gegen Krankheitsausbrüche, die durch unterschiedlichste Pathogene hervorgerufen werden können, zu schützen. Je nach Pathogen-Typ werden bei der pflanzlichen Immunreaktion unterschiedliche Signal-Hormone synthetisiert, die die jeweils …