@phdthesis{Griebel2010, author = {Griebel, Thomas}, title = {Local and systemic resistance in Arabidopsis thaliana in response to Pseudomonas syringae: impact of light and phytosterols}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-48370}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2010}, abstract = {Inoculation with plant pathogens induces a diverse range of plant responses which potentially contribute to disease resistance or susceptibility. Plant responses occuring in consequence of pathogen infection include activation of classical defence pathways and changes in metabolic activity. The main defence route against hemibiotrophic bacterial pathogens such as Pseudomonas syringae is based on the phytohormone salicylic acid (SA). SA-mediated responses are strictly regulated and have also been shown to depend on external factors, e.g. the presence of light. A major goal of this work was to provide a better understanding of the light dependency of plant defence responses mediated through SA. The second part of the project focussed on the influence of plant sterols on plant resistance. I analyzed leaf lipid composition and found that accumulation of the phytosterol stigmasterol in leaves and in isolated (plasma) membranes is a significant plant metabolic process occurring upon pathogen infection.}, subject = {Ackerschmalwand}, language = {en} }