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菊叶薯蓣中的皂素生物合成调控研究

摘要第6-8页
ABSTRACT第8-10页
1 Introduction第14-45页
    1.1 Dioscorea composite第14-20页
        1.1.1 Taxonomy and Morphology第14-20页
            1.1.1.1 Taxonomy第14-15页
            1.1.1.2 Morphology第15-20页
                1.1.1.2.1 Vegetative Morphology第15-17页
                1.1.1.2.2 Reproductive Morphology第17-20页
    1.2 Secondary metabolites in plants第20-24页
        1.2.1 Functions of secondary Metabolites第21-23页
        1.2.2 Types and origins of secondary metabolites第23页
        1.2.3 Production of secondary metabolites第23-24页
    1.3 Diosgenin and it's biosynthesis in plant第24-40页
        1.3.1 Bioactivities of diosgenin第25-27页
        1.3.2 Chemistry and plants sources第27-33页
        1.3.3 Methods of quantitative analysis第33页
        1.3.4 Diosgenin biosynthesis in plant第33-40页
            1.3.4.1 Diosgenin biosynthesis pathway第33-39页
            1.3.4.2 Factors affecting diosgenin accumulation in plant第39-40页
    1.4 Diosgenin biosynthesis regulation in D. composite第40-44页
        1.4.1 Elicitation第41页
        1.4.2 Bioactivities of elicitors第41-42页
        1.4.3 Jasmonate pathway第42-43页
        1.4.4 Ethylene pathway第43页
        1.4.5 Salicylic acid pathway第43-44页
    1.5 Objective of the study第44-45页
2 Effect of methyl dihydro jasmonate, ethephon and salicylic acid on diosgeninlevel in in vitro cultured D.composita第45-88页
    2.1 Materials and methods第46-54页
        2.1.1 Explants initiation growth and treatment第46-49页
        2.1.2 Determination of diosgenin content第49-50页
        2.1.3 Determination of photosynthetic pigments, soluble proteins and sugars第50-51页
        2.1.4 Estimation of lipid peroxidation and hydrogen peroxide (H2O2)第51-52页
        2.1.5 Antioxidant enzymes activity第52-53页
        2.1.6 Ascorbate and dehydroascorbate estimation第53-54页
    2.2 Results第54-85页
        2.2.1 Plantlets growth rate第54-58页
        2.2.2 Diosgenin content第58-61页
        2.2.3 Photosynthetic pigments, total soluble proteins and soluble sugars第61-71页
        2.2.4 Oxidative stress第71-75页
        2.2.5 Antioxidant enzymes activity第75-85页
            2.2.5.1 Superoxid dismutase (SOD) activity第75-77页
            2.2.5.2 Peroxidase (POD) activity第77-78页
            2.2.5.3 Ascorbate peroxidase (APX) activity第78-80页
            2.2.5.4 Catalase (CAT) activity第80-81页
            2.2.5.5 Total ascorbate and dehydroascorbate content第81-85页
    2.3 Discussion第85-88页
3 Improvment of Diosgenin Level in the Tubers of D.Composita by MethylDihydro Jasmonate, Ethephon and Salicylic Acid treatment第88-96页
    3.1 Material and methods第92页
    3.2 Results第92-95页
    3.3 Discussion第95-96页
4 Conclusions第96-98页
References第98-116页
List of publications第116-117页
Acknowledgements第117页

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