Growth and nitrate reduction of Beggiatoa filaments studied in enrichment cultures [Elektronische Ressource] / von Anja Kamp

Growth and nitrate reduction of Beggiatoa filamentsstudied in enrichment culturesVon der naturwissenschaftlichen Fakultätder Gottfried Wilhelm Leibniz Universität Hannoverzur Erlangung des Grades einerDoktorin der NaturwissenschaftenDr. rer. nat.genehmigteDissertationvonDipl.-Biol. Anja Kampgeboren am 06.05.1968 in Bremen2007Referentin: Juniorprof. Dr. Heide Schulz-VogtKorreferent: Prof. Dr. Bo Barker JørgensenTag der Promotion: 28.11.2007CONTENTSSummary 5Zusammenfassung 7Chapter 1 General introduction 9• Introduction 10• Objectives and outline of this thesis 24• Contributions to publications 26Chapter 2 Video-supported analysis of Beggiatoa filament 27growth, breakage, and movementChapter 3 Anaerobic sulfide oxidation with nitrate by a freshwater 43Beggiatoa enrichment cultureChapter 4 Dissimilatory nitrate reduction to ammonium by a 57freshwater Beggiatoa strainChapter 5 Concluding remarks and outlook 71List of publications 77Danksagung 79Erklärung 81Summary 5SUMMARYIn this thesis, several aspects of the gliding, filamentous, colourless sulphur bacteriaBeggiatoa were investigated. The first part of this thesis addressed the growth mode, breakageof filaments for multiplication, and movement directions of filaments of Beggiatoa. MarineBeggiatoa were enriched in oxygen-sulphide gradient tubes, and observed with a camerasystem.