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GRK 1342:  Molecular and Functional Analysis of Lipid-based Signal Transduction Systems

Subject Area Plant Sciences
Term from 2007 to 2015
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 19719780
 
Final Report Year 2016

Final Report Abstract

The research training group GRK1342 (Molecular and functional analysis of lipid-based signal transduction systems) was established as a research-oriented program that combined advanced research in lipid biology and signal transduction with an interdisciplinary training curriculum for PhD students. It was concerned with the biosynthesis of small molecule lipid signals, the molecular analysis of components of the signal transduction machinery including their arrangement in nanodomains, activation of ion channels and protein kinases/phosphatases, transcriptional regulation of target genes and functional output of lipid-based signals. The impact of structural lipid composition on plant microbe interactions was also studied. Results from these projects helped to explain how, in the context of abiotic and biotic stresses, reactive oxygen species and lipid modifying enzymes rapidly generate biological active lipids that transcriptionally activate detoxification and survival genes to cope better with environmental stress challenges. Beyond their function in stress responses, jasmonate and absicic acid (ABA) lipid signals were found to play an important regulatory role in the hunting cycle and trap performance of the carnivorous Venus flytrap (Dionaea muscipula). Furthermore, first evidence - in plants - that membrane nanodomains represent a platform for functional protein assembly within different signalling complexes was provided. The core ABA-signalosome, consisting of an ABA- receptor/phosphatase complex and anion channel-activating kinases, was reconstituted in vitro, in planta and in the Xenopus oocytes which allowed analyses of the properties of these signaling components and their regulation in membrane lipid nanodomains (rafts). With respect to structural lipids, several projects demonstrated a previously unrecognized impact of cuticle and membrane lipid composition on the phyllosphere microbial community and agrobacteriummediated crown gall disease. Thus, within the research program of the GRK1342, PhD students became familiar with a very broad range of state-of-the-art methods including trancriptomics, proteomics, lipidomics, electrophysiology, optogenetics and high resolution microscopy enabling them to develop a scientific career in academics or industry. Our graduate students further absolved a structured training program comprising lecture series covering a broad range of topics, seminars, conferences and common activities embedded in a vivid plant science community in Würzburg and beyond.

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