DECLARATION LETTER
声明
Table of contents
摘要
ABSTRACT
List of Abbreviations
1 Literature review
1.1 Genus Pseudomonas
1.1.1 Pseudomonas syringae
1.2 Importance of iron to life
1.2.1 Problems with iron
1.2.2 Iron uptake system of Gram-negative bacteria
1.3 Siderophores
1.3.1 Types of siderophores
1.3.2 Siderophores of Pseudomonas species
1.3.3 Pyoverdine
1.3.4 Global pathway of a pyoverdine from biosynthesis to secretion in P.aeruginosa
1.4 Host range of some species of Genus Pseudomonas
1.5 Caenorhabditis elegans
1.5.3 Survival assays using C.elegans
1.5.4 Role of pyoverdine in virulence of bacteria
2 Aims and significance of this study
3 Material and Methods
3.1 Experimental Design
3.2 Bacterial and C.elegans strains,Genes and Plasmids
3.3 Apparatus and equipment
3.4 Chemicals,Media and Growth Conditions
3.5 Preparation of Bacterial Culture
3.5.1 Revival of Bacterial Culture
3.5.2 Preparation of overnight Bacterial culture
3.7 Pyoverdine determination assay
3.8 Molecular Biology Techniques
3.8.1 Polymerase chain reaction (PCR)
3.8.2 Agarose gel electrophoresis
3.8.3 Purification of DNA
3.8.4 Plasmid Extraction
3.8.5 Preparation of electro-competent cells of P.syringae MB03
3.8.7 Disruption of pyoverdine biosynthetic genes by RecTE recombination system
3.9 LC-MS analysis of cell filtrates of MB03 and its derivatives
3.10 C.elegans Special Techniques
3.10.2 Synchronization of C.elegans
3.10.3 Liquid Killing Assay
4 Results
4.1.P.syringae MB03 has Genetic PotentiaI to Produce Pyoverdine
4.2.Pyoverdine is produced by P.syringae MB03 only under iron1imitil conditions limiting conditions
4.3.Genetic,Biochemical and Spectrofluorometric Analysis of Pyoverdine NRPS Genes pvdD and pvdJ
4.4 Pyoverdine Exposure Causes C.elegans Death
4.5 Role of Iron in the Pathogenicity of MB03 against C.elegans
5 Discussion
6 Concluding remarks and Future Prospects
References
List of Publications
Extra Achievements during my Master’s
Appendix
Acknowledgements