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施氏假单胞菌A1501双组分调节系统GacS/GacA参与固氮及生物膜形成的功能解析

摘要第6-7页
ABSTRACT第7-8页
Abbreviations第16-18页
Chapter1 Introduction第18-28页
    1.1 GacS/GacA,two component system第18-19页
    1.2 Pseudomonas stutzeri A1501第19-20页
    1.3 Signaling pathway and its role with GacS/GacA two component system in Pseudomonas第20-22页
    1.4 Native and synthetic gene regulation to nitrogen limitation stress第22-25页
    1.5 Role of sigma factors and its importance in stress第25-27页
    1.6 Research plan第27-28页
Chapter2 Demonstrating gacS and gacA activity during different abiotic conditions in Pseudomonas stutzeri A1501第28-36页
    2.1 Introduction第28页
    2.2 Methods and material第28-30页
        2.2.1 Bacterial strains,culture media and growth condition:第28-29页
        2.2.2 Analysis at abiotic stress第29页
        2.2.3 Nitrogenase activity assays第29-30页
        2.2.4 Quantitative real-time qRT-PCR analysis第30页
    2.3 Results第30-34页
        2.3.1 Effect of high osmolarty第30-31页
        2.3.2 Effect of nitrogen starvation on biofilm formation第31页
        2.3.3 Effect of low pH第31页
        2.3.4 Effect of extreme temperature第31-34页
    2.4 Biofilm formation at different oxygen levels第34页
    2.5 Nitrogenase activity different oxygen concentrations第34-35页
    2.6 Conclusion第35-36页
Chapter3 The effect of mutation of anr gene on nitrogen fixation and biofilm formation in Pseudomonas stutzeri A1501 at low levels of oxygen第36-62页
    3.1 Introduction第36-38页
    3.2 Method and Materials第38-39页
        3.2.1 Bacterial strains,culture media,plasmids and growth condition第38页
        3.2.2 Growth curve analysis第38页
        3.2.3 Oxidative stress analysis:第38页
        3.2.4 Estimation of biofilm formation第38-39页
        3.2.5 Nitrogenase activity assays第39页
        3.2.6 Quantitative Real-Time PCR analysis第39页
    3.3 Results第39页
    3.4 Construction of anr insertional mutant第39-40页
        Amplification for anr region of gene for insertion mutation第39-40页
    3.5 pJET assembly of gene:第40-41页
    3.6 JET plasmid transformed in E.coli:第41-42页
    3.7 Formation of pK-18 mob with anr plasmid and transformation in E.coli第42-43页
    3.8 Colony PCR第43-44页
    3.9 Tri-parental mating or Conjugation:第44-46页
        3.9.1 Pre-cultures第44页
        3.9.2 Conjugation第44-46页
    3.10 Construction of dnr insertional mutant第46-48页
        3.10.1 Amplification for dnr region of gene for insertion mutation第46页
        3.10.2 Ligating the plasmid pK-18 mob with dnr fragment第46-48页
    3.11 Tri-parental mating or conjugation:第48-50页
        3.11.1 Pre-cultures第48页
        3.11.2 Conjugation第48-50页
    3.12 Complimentary Mutant formation:第50-52页
        3.12.1 Cutting the Plasmid using restriction enzymes:第50页
        3.12.2 Ligating the plasmid pLAFR-3 with anr and dnr gene第50页
        3.12.3 Escherichia coli transformation:第50-51页
        3.12.4 Colony PCR第51页
        3.12.5 Pre-cultures第51-52页
        3.12.6 Conjugation第52页
    3.13 Bioinformatics Analysis第52-55页
        3.13.1 Growth curve analysis第53-54页
        3.13.2 Effect of different oxygen concentration on gacS,gacA and anr第54-55页
    3.14 Oxidative stress analysis:第55-56页
    3.15 Studying biofilm dispersal of anr and dnr genes第56-59页
        Test tube Biofilm formation第56-58页
        Relative qRT-PCR analysis for biofilm formation第58-59页
    3.16 Nitrogenase activity anr and dnr genes第59-60页
    3.17 Relative qRT-PCR analysis for nitrogenase activity第60-61页
    3.18 Conclusion第61-62页
Chapter4 Functional and regulatory characterization of GacS/GacA two component system in plant associated microorganism Pseudomonas stutzeri A1501第62-99页
    4.1 Introduction第62-63页
    4.2 Materials and Method第63-65页
        4.2.1 Bacterial strains,culture media,plasmids and growth condition第63页
        4.2.2 Strains and plasmids第63-64页
        4.2.3 Medium第64页
        4.2.4 Enzymes and chemical reagents第64-65页
        4.2.5 Major instruments第65页
        4.2.6 Commonly used solution and antibiotics第65页
    4.3 Experimental methods第65-70页
        Extraction of bacterial plasmid DNA第65-66页
        4.3.1 Isolation of Pseudomonas stutzeri A1501 genome:第66-67页
        4.3.2 PCR amplification of genes第67-70页
    4.4 Colony PCR第70页
    4.5 Extraction of DNA from gel第70-71页
    4.6 Tri-parental mating or conjugation第71-72页
        4.6.1 Pre-cultures第71页
        4.6.2 Conjugation第71-72页
    4.7 Selection of the first recombination event第72页
    4.8 Selection of the second recombination event第72-73页
    4.9 Complimentary mutant formation第73-76页
        4.9.0 Amplification of the gene of interest第73页
        4.9.1 Cutting the plasmid using restriction enzymes第73-74页
        4.9.2 Ligating the plasmid pLAFR-3 with gacS and gacA gene第74页
        4.9.3 Escherichia coli transformation第74页
        4.9.4 Colony PCR第74-75页
        4.9.5 Pre-cultures第75页
        4.9.6 Conjugation第75-76页
    4.10 Construction of double mutant(ΔgacS/ ΔgacA mutant)第76-77页
    4.11 Extraction Of bacterial total RNA第77页
    4.12 cDNA reverse transcription synthesis第77-78页
    4.13 Growth curve analysis第78-79页
        4.13.1 Analysis at abiotic stress using96 well plate for estimation of biofilm formation第79页
        4.13.2 Nitrogenase activity assays第79页
        4.13.3 Quantitative real-time qRT-PCR analysis第79页
    4.14 Fluorescence real-time quantitative PCR第79-82页
    4.15 Probe design principles第82-83页
    4.16 Results第83-84页
        4.16.1 Ligating the up and down regulation gene of gacS with gmR(gentamycin resistant gene)第83-84页
        4.16.2 Ligating the plasmid pK18 mob-sacB with up and down regulatory gene of gacS with gmR(gentamycin resistant gene)第84页
    4.17 Tri-parental mating or conjugation第84-85页
        4.17.1 After first cross第84-85页
        4.17.2 After second cross第85页
    4.18 Complimentary mutant formation:第85-87页
        Amplification of the gene of interest第86页
        Transformation of pLAFR-3 along with gacS gene in E.coli第86-87页
    4.19 Construction of double mutant(ΔgacS/ ΔgacA mutant)第87页
        Relative qRT-PCR analysis for nitrogenase activity第87页
    4.20 Bioinformatics Analysis:第87-88页
    4.21 Growth curve analysis第88-89页
    4.22 Effect of different abiotic stress on biofilm formation第89-90页
    4.23 Effect of nitrogen starvation condition第90-92页
    4.24 Effect of low pH第92页
    4.25 Effect of temperature第92-93页
    4.26 Nitrogenase activity第93-95页
    4.27 Biofilm formation第95-97页
    4.28 Conclusion第97-99页
Chapter5 Transcriptome analysis of gacA mutant in Pseudomonas stutzeri A1501 during normal growth curve第99-116页
    5.1 Introduction第99-100页
    5.2 Method and Materials:第100-101页
        5.2.1 Bacterial strains,culture media,plasmids and growth condition第100页
        5.2.2 Growth curve analysis第100页
        5.2.3 Sample collection第100页
        5.2.4 RNA isolation第100-101页
        5.2.5 RNA deep seq data analysis第101页
    5.3 Results第101-115页
        5.3.1 Influence of gacA inactivation on transcriptome profile第103页
        5.3.2 gacA targets involved in primary metabolism and energy metabolism第103-105页
        5.3.3 Total number of sRNA:第105-115页
    5.4 Conclusion:第115-116页
Discussion第116-123页
    Role of sRNA in stress condition第118-123页
Reference第123-137页
Appendix第137-140页
ACKNOWLEDGEMENT第140-141页
RESUME第141页
    Personal Profile第141页
    Academic Qualification第141页
    Award and Fellowship第141页
    Research Publication第141页
    Thesis titled第141页

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