Dokument: Mathematical models of light acclimation mechanisms in higher plants and green algae
| Titel: | Mathematical models of light acclimation mechanisms in higher plants and green algae | |||||||
| URL für Lesezeichen: | https://docserv.uni-duesseldorf.de/servlets/DocumentServlet?id=40634 | |||||||
| URN (NBN): | urn:nbn:de:hbz:061-20161212-120626-5 | |||||||
| Kollektion: | Dissertationen | |||||||
| Sprache: | Englisch | |||||||
| Dokumententyp: | Wissenschaftliche Abschlussarbeiten » Dissertation | |||||||
| Medientyp: | Text | |||||||
| Autor: | MSc. Eng. Matuszyńska, Anna [Autor] | |||||||
| Dateien: |
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| Beitragende: | Prof. Dr. Ebenhöh, Oliver [Gutachter] Prof. Dr. Westhoff, Peter [Gutachter] | |||||||
| Stichwörter: | acclimation, Arabidopsis, Chlamydomonas, kinetic models, non-photochemical quenching, photosynthesis | |||||||
| Dewey Dezimal-Klassifikation: | 500 Naturwissenschaften und Mathematik » 570 Biowissenschaften; Biologie | |||||||
| Beschreibung: | Mathematical models have become an increasingly accepted and widely used tool in biology. Their power lies in detecting common underlying principles behind broad classes of phenomena. Throughout this work, a modelling approach was used to study photosynthesis and provide a better understanding of the role and regulation of several short-term acclimation mechanisms in plants and green algae, collectively termed as non-photochemical quenching (NPQ).
In the process of photosynthesis, solar energy is harvested by chlorophyll pigments and converted into chemical energy by a series of redox reactions. High light intensities may severely impair the photosynthetic apparatus and damage the reaction centres, where charge separation occurs. In order to protect themselves against photodamage, plants and other photosynthetic organisms are capable of switching from a photosynthetic, light-harvesting state to a protective one, in which excess absorbed radiant energy is dissipated as heat. Through the re-organisation of light harvesting complexes various photosynthetic organisms gain the ability to dynamically react to external stimuli and to keep the redox balance within the thylakoid membrane. However, what is a desired and even an essential mechanism in natural, fluctuating environments, becomes an unwanted feature in industrial cultivation, where one aims at utilising the applied light energy with the highest possible efficiency. A developed modular, mathematical model of light acclimation processes of the photosynthetic electron transport chain translates our current knowledge gained from years of experimental work, into more general, mathematical statements. With that, a more thorough understanding of the molecular signalling mechanisms guiding acclimation responses is possible. The model sets a framework for assessing the role of photoprotective mechanisms in improving fitness of the organisms and helps to answer open questions on the molecular mechanisms of key components of the signalling pathways of acclimation. Thanks to its simplicity and modularisation, it can be used to test various hypotheses regarding photoprotective behaviour of plants under specific conditions. The model was successfully applied to quantify the contribution of several acclimation components on short-term light memory, to analyse possible mechanisms of state transitions and to predict the response of organisms responses while exposed to monochromatic light. It is envisaged that the detailed understanding of non-photochemical quenching shall contribute to developing optimal strategies for a sustainable biotechnological exploitation of plants and microalgae. | |||||||
| Lizenz: |  Urheberrechtsschutz | |||||||
| Fachbereich / Einrichtung: | Mathematisch- Naturwissenschaftliche Fakultät | |||||||
| Dokument erstellt am: | 12.12.2016 | |||||||
| Dateien geändert am: | 12.12.2016 | |||||||
| Promotionsantrag am: | 30.09.2016 | |||||||
| Datum der Promotion: | 23.11.2016 |
